Acupuncture (PDQ®)–Health Professional Version - National Cancer Institute

Acupuncture (PDQ®)–Health Professional Version

Human/Clinical Studies

Effect of Acupuncture on Immune Function

There has been limited research, mostly performed in China, evaluating the effect of acupuncture on immune system function in cancer patients, suggesting that acupuncture improves immune function.[1-7]

Effect of Acupuncture on Cancer Pain

Clinical studies and reviews of acupuncture as a treatment for cancer-related pain have been reported in the English language (refer to Table 1).[8-15] Two studies were randomized controlled trials (RCTs), with one study conducted in China and one in France.[9,13] Four studies were case series, with one each from England, France, Hong Kong, and the United States.[8,10-12]

One randomized trial compared classical Chinese acupuncture, acupuncture point injection with freeze-dried human transfer factor, and conventional analgesic treatment in patients with gastric cancer pain.[9] The investigators reported an equivalent analgesic effect among the three groups observed after 2 months of treatment; however, the conventionally treated group experienced significantly superior analgesia compared with both acupuncture treatment groups during the first 10 days of treatment. The researchers reported that the patients in both acupuncture treatment groups also experienced improved quality of life (QOL) and a decrease in the side effects of chemotherapy, in addition to analgesia.

Also, a nonrandomized, single-arm, observational clinical study evaluated the effect of auricular acupuncture in 20 cancer patients who were still experiencing pain after treatment with analgesics.[10] While patients continued their analgesic medication, auricular acupuncture needles were embedded in ear acupuncture points, chosen according to clinical symptoms and electrodermal response, and were left in place until they fell out. In some cases, the needles remained in place for 35 days, while in others they fell out after 5 days. Pain intensity was measured by a nurse on the visual analog scale (VAS) on day 0 and day 60, and the data were analyzed using a t test. The results showed that pain intensity decreased or remained stable after auricular acupuncture in all patients, with a significant average pain intensity decrease of 33 mm (P < .001). The same investigators later reported a larger (N = 90) randomized, blinded, controlled trial in which cancer pain intensity was significantly decreased (by 36%) in an auricular acupuncture treatment group, in comparison with control groups (by 2%, acupuncture at placebo points or auricular seeds placed at placebo points) after 2 months of treatment (P < .001).[13]

Although most of these studies were positive and demonstrated the effectiveness of acupuncture in cancer pain control, the findings have limited significance because of methodologic weaknesses such as small sample sizes, an absence of patient blinding to treatment in most cases, varying acupuncture treatment regimens, a lack of standard outcome measurements, and an absence of adequate randomization. A 2015 Cochrane systematic review of five RCTs reported benefits of acupuncture in reducing pancreatic cancer pain, pain from late-stage cancer, and chronic cancer-related neuropathic pain; the study found no difference between real and sham electroacupuncture (EA) for ovarian cancer pain.[16] However, because of small sample sizes and a high risk of bias, the authors concluded, “there is insufficient evidence to judge whether acupuncture is effective in treating cancer pain in adults.”[16] In addition, a 2016 systematic review and meta-analysis of 1,639 participants with cancer-related pain in 20 RCTs with a high risk of bias showed that acupuncture alone was not superior to conventional drug therapy, although acupuncture plus drug therapy appeared to be superior to drug therapy alone.[17] However, this study was limited by the poor quality of combination therapy trials. Further investigations into the effects of acupuncture on cancer pain using rigorous scientific methodology are warranted.

Table 1. Clinical Studies of Acupuncture for Cancer-Related Paina

ENLARGE

Reference/Sample Size	Type of Study	Type of Pain	Treatment Groupsb	Treatment Duration	Concurrent Therapy Used (Yes/No/ Unknown)c	Level of Evidence Score and Resultsd
EA = electroacupuncture; N = number of patients; RCT = randomized controlled trial; VAS = visual analog scale.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially recruited/considered by the researchers who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported.
cConcurrent therapy for symptoms treated (not cancer).
dStrongest evidence reported that the treatment under study has activity or otherwise improves the well-being of cancer patients. For information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
eP < .05, acupuncture treatment versus conventional analgesics.
fP < .0001, acupuncture versus placebo.
gP < .00001, day 60 after start of acupuncture treatment versus day 0.
[9] (N = 48)	RCT	Gastric cancer pain	Group 1, acupuncture (N = 16) and acupuncture point injection of freeze-dried human transfer factor (N = 16); Group 2, conventional analgesics (N = 16)	2 mo	No	1iiC; in long-term treatment, equal or better analgesia than conventional drugs e
[13] (N = 90)	RCT	Cancer pain	Group 1, auricular acupuncture (N = 28); Group 2, acupuncture at placebo points in ear or auricular seeds fixed at placebo points with adhesive (N = 51)	2 mo	Yes, analgesics and co-analgesics, including tricyclic antidepressants and antiepileptics	1sC; pain intensity decreased by 36% at 2 monthsf
[10] (N = 20)	Nonconsecutive case series	Cancer pain	Group 1, auricular acupuncture (N = 20); Control, none	Unknown	Yes, analgesics	3iiiC; average pain intensity decreased by 43%, using VAS (0–100 mm)g
[11] (N = 183)	Nonconsecutive case series	Cancer-related pain	Group 1, acupuncture (N = 183); Control, none	Unknown	Yes, analgesics	3iC; 95 (52%) “significantly helped”
[12] (N = 29)	Nonconsecutive case series	Cancer pain	Group 1, EA (N = 29); Control, none	Unknown	Yes, analgesics	3iC; pain reduced; injection of analgesics reduced or no longer required
[8] (N = 5)	Best case series	Cancer pain	Group 1, auricular EA (N = 5); Control, none	Unknown	Unknown	4; symptoms improved

Effect of Acupuncture on Cancer Treatment–Related Side Effects

Pain

Acupuncture for postsurgical pain

Five RCTs published in English have addressed the use of acupuncture for pain related to cancer treatment, mostly postsurgical pain (refer to Table 2). One RCT of 106 cancer patients who experienced postthoracotomy pain showed no statistical difference in the real acupuncture (RA) group compared with the sham acupuncture (SA) group in patients' pain scores measured by the Brief Pain Inventory at the 30-, 60-, and 90-day follow-up.[18] The efficacy of the unique intradermal needles used in this study was questionable.

Another smaller RCT (N = 27) showed a trend of lower VAS pain scores in patients who received EA when compared with patients who received SA on postoperative days 2 and 6; and a statistically significant lower cumulative dose of patient controlled analgesia on postoperative day 2 (P < .05).[19] However, this study was limited by its small sample size.

One RCT (N = 93) compared acupuncture with massage therapy and usual care in controlling postoperative pain, nausea, vomiting, and depressive moods.[20] This study showed that postoperative acupuncture and massage in addition to usual care significantly improved pain control when compared with usual care alone.

Another study showed that in cancer patients with chronic pain or dysfunction as a result of neck dissection, four weekly acupuncture treatments significantly reduced pain and improved function compared with standard care alone.[21] Additionally, a study of 80 patients with breast cancer showed that when compared with usual care alone, acupuncture significantly improved postoperative pain and range of movement.[22] However, with no sham therapy group in these two studies, it is difficult to determine how much of the improvement is because of the placebo effect, and whether RA needles and professionally trained acupuncturists and massage therapists are required in the intervention.

Acupressure has been shown to be efficacious in reducing procedural pain. Two RCTs showed that acupressure at LI4 and HT7 significantly reduced patients’ pain and anxiety.[23,24]

Table 2. Summary of Randomized Controlled Trials of Acupuncture for Cancer Treatment–Related Pain Reliefa

ENLARGE

Reference/Sample Size	Type of Pain	Treatment Groupsb	Treatment Duration	Concurrent Therapy Used (Yes/No/ Unknown)c	Level of Evidence Score and Resultsd
BMAB = Bone marrow aspiration and biopsy; CI = confidence interval; EA = electroacupuncture; N = number of patients; SA = sham acupuncture.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially recruited/considered by the researchers who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported.
cConcurrent therapy for symptoms treated (not cancer).
dStrongest evidence reported that the treatment under study has activity or otherwise improves the well-being of cancer patients. For information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
eP < .05, acupuncture versus placebo.
fP = .038, acupuncture and massage versus usual care.
gP = .008, acupuncture versus usual care.
hP ≤ .01, acupuncture versus usual care.
iP < .001, acupuncture versus usual care.
[18] (N = 106)	Postthoracotomy pain	Group 1, intradermal acupuncture (N = 52); Group 2, SA (N = 54)	1 mo	Unknown	1sC; no difference between the two groups
[19] (N = 25)	Postthoracotomy pain	Group 1, EA (N = 13); Group 2, SA (N = 12)	7 d	Yes, oral or intravenous antibiotics	1sC; lower cumulative dose of patient-controlled analgesic morphine used on postoperative day 2 in EA groupe
[20] (N = 45)	Postoperative pain	Group 1, acupuncture and massage (N = 93); Group 2, usual care (N = 45)	2 d	Massage	1iiC; the treatment group reported less painf
[21] (N = 58)	Pain and dysfunction in patients with cancer and a history of neck dissection	Group 1, acupuncture (N = 28); Group 2, usual care (N = 30)	Weekly for 4 wk	Unknown	1iiC; Constant-Murley scores improved more in the acupuncture group (adjusted difference between groups = 11.2; 95% CI, 3.0–19.3)g
[22] (N = 80)	Postoperative pain in breast cancer patients	Group 1, acupuncture (N = 48); Group 2, usual care (N = 32)	Postoperative d 3, 5, 7 and day of discharge	Unknown	1iiC; the acupuncture group had improved postoperative painh and range of movementi
[23] (N = 77)	BMAB pain	Group 1, acupressure (N = 37); Group 2, sham acupressure (N = 40)	During the BMAB (11–12 min)	Yes, local analgesics	1sC; acupressure reduced severe pain compared with sham acupressure
[24] (N = 90)	BMAB	Group 1, acupressure at LI4 (N = 30); Group 2, acupressure at HT7 (N = 30); Group 3, sham acupressure (N = 30)	2 min after the start and end of biopsy	Yes, lidocaine	1sC; reduced anxiety and pain in treatment group

Acupuncture for aromatase inhibitor-associated musculoskeletal symptoms

A 2012 meta-analysis of 29 trials with 17,922 patients found that RA is more beneficial than both SA and no acupuncture in the treatment of chronic pain, with a modest effect size of 0.23 (95% confidence interval [CI], 0.13–0.33).[25] However, none of the patients in these trials had pain due to cancer or cancer therapies. Recently published meta-analyses have examined outcomes from RCTs evaluating the effects of acupuncture on aromatase inhibitor-associated musculoskeletal symptoms (AIMSS) in breast cancer survivors with a history of stage I, II, or III nonmetastatic hormone receptor–positive breast cancer currently taking an aromatase inhibitor.

Three meta-analyses [26-28] identified five studies [29-33] that randomly assigned participants to receive SA or RA. Four of the studies were conducted in the United States and one was conducted in Australia. Two studies used EA [31,32] and three studies used manual acupuncture (MA).[29,30,33] Three of these studies were sham-controlled; one randomly assigned patients to receive either acupuncture followed by observation or vice versa, and one was a three-arm study where participants were randomly assigned to SA, EA, or wait-list control (WLC). All studies had relatively small sample sizes ranging from 19 to 67.

All studies included in the meta-analyses [26-28] classified changes in measures of joint pain and stiffness as primary outcomes. Participant symptom improvement was assessed by using self-reported measures for pain, and pain interference and stiffness at baseline and at specified intervals during and after the intervention. Results from these meta-analyses were not definitive and suggested further research needs to be conducted in this area.

Further extending the literature supporting the efficacy of acupuncture in treating AIMSS, an RCT was conducted using 226 participants (SWOG-S1200 [NCT01535066]) randomly assigned to three groups (MA, SA, and WLC) and found improvements in joint pain after treatment when compared with SA and WLC.[33] These findings are of uncertain clinical significance because the magnitude of difference in the primary outcome measure between groups (MA vs. SA) was less than the amount that was predetermined as being clinically meaningful by the researchers. However, these findings are consistent with results from existing observational studies showing the safety and feasibility of acupuncture in treating pain.

Table 3. Clinical Studies of Acupuncture for Aromatase Inhibitor-Induced Musculoskeletal Symptomsa

ENLARGE

Reference/Sample Size	Type of Study	Treatment Groupsb	Treatment Durationc	Concurrent Therapy Used (Yes/No/ Unknown)d	Level of Evidence Score and Resultse
AIMSS = aromatase inhibitor-induced musculoskeletal symptoms; EA = electroacupuncture; N = number of patients; RA = real acupuncture; RCT = randomized controlled trial; SA = sham acupuncture; WLC = wait-list control.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially recruited/considered by the researchers who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported.
cRepresents primary outcome analysis time point; certain studies may have an extended intervention period.
dConcurrent therapy for symptoms treated (not cancer).
eStrongest evidence reported that the treatment under study has activity or otherwise improves the well-being of cancer patients. For information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
[33] (N = 226)	RCT	Group 1, RA (N = 110); Group 2, SA (N = 59); Group 3, WLC (N = 57)	Twice weekly for 6 wk, then once weekly for the following 6 wk for a total of 12 wk	Yes, non-opioid analgesics	1sC; statistically significant reduction in joint pain at 6 weeks in the RA group compared with SA and WLC groups
[29] (N = 38)	RCT	Group 1, RA (N = 20); Group 2, SA (N = 18)	Twice weekly for 6 wk	Yes, non-opioid analgesics	1sC; RA significantly reduced AIMSS more than did SA
[30] (N = 47)	RCT	Group1, RA (N = 23); Group 2, SA (park device) (N = 24)	Weekly acupuncture or SA for 8 wk	Unknown	1sC; no significant difference between two groups
[31] (N = 29)	Pilot study	Group 1, real EA (N = 14); Group 2 sham EA (N = 15)	Twice weekly for 6 wk	Yes, non-opioid analgesics	1sC; no significant differences in outcome measures between two groups

Nausea and vomiting

Chemotherapy-induced nausea and vomiting

Of all the investigated effects of acupuncture on cancer-related or chemotherapy-related symptoms and disorders, the positive effect of acupuncture on chemotherapy-induced nausea and vomiting (N/V) is the most convincing, as demonstrated by the consistency of the results of a variety of clinical study types, including RCTs, nonrandomized trials, prospective consecutive case series, and retrospective studies (refer to Table 4). Consistent with the findings from clinical studies of acupuncture on N/V due to other causes (i.e., postoperative N/V and morning sickness), these studies showed acupuncture to be effective in the treatment of chemotherapy-induced N/V (CINV).

A 2013 systematic review of literature on acupuncture in cancer care screened 2,151 publications and identified 41 RCTs studying the effect of using acupuncture to treat eight cancer treatment–related symptoms (pain, nausea, hot flashes, fatigue, radiation-induced xerostomia, prolonged postoperative ileus, anxiety/mood disorders, and sleep disturbance). The review concluded that acupuncture is an appropriate adjunctive treatment for CINV, but additional studies are needed because most RCTs had unclear bias or a high risk of bias.[34]

In 2005, a comprehensive meta-analysis of 11 RCTs (N = 1,247) evaluating the effect of acupuncture-point stimulation in controlling CINV showed that acupuncture-point stimulation significantly reduced the proportion of acute vomiting (relative risk, 0.82; 95% CI, 0.69–0.99, P = .04),[35] although the meta-analysis did not show that acupuncture reduced the mean number of acute emetic episodes or acute or delayed nausea severity compared with control.

The trials in the meta-analysis were published between 1987 and 2003, and the sample sizes ranged from ten patients in the smallest trial [36] to 747 patients in the largest trial.[37] Among the ten trials that reported a chemotherapy regimen, all patients received moderate to high emetogenic chemotherapy. Eight of the trials used ondansetron, a 5-HT3-receptor antagonist, as the antiemetic regimen. The other three trials used methotrexate alone, methotrexate with prednisone, or methotrexate with dopaminergic antagonists as the antiemetic regimen.[35] None of the antiemetic regimens contained aprepitant because the trials all predated this drug.

A meta-analysis of acupuncture in N/V is the most comprehensive summary of clinical research on the role of acupuncture-point stimulation in controlling CINV. It found that acupuncture-point stimulation decreases the proportion of patients who experience acute chemotherapy-induced vomiting and concurred with the previous systemic review and meta-analysis.[38,39] It suggested that acupressure may relieve chemotherapy-induced nausea, even though the studies were limited by lack of an effective control arm to rule out the placebo effect. It also suggested differences among acupuncture-point stimulation modalities, with invasive-point stimulation to be more effective than noninvasive-point stimulation in reducing acute CINV.[35] It has since been cited multiple times by review articles and oncology practice guidelines.[40-42]

The National Institutes of Health Consensus Development Conference held in 1997 reviewed studies that evaluated the safety and efficacy of acupuncture in treating postoperative- and CINV.[43] Studies discussed at the conference reported significantly less N/V compared with the control group.[36,44-47] The panel stated that “there is clear evidence that needle acupuncture treatment is effective for postoperative and chemotherapy N/V.”[43]

The acupuncture point specificity is worth mentioning because most of the earlier acupuncture CINV trials used the PC6 acupuncture point and showed positive results. A well-designed, randomized, placebo-controlled trial published in 2014 showed that K1 acupoint acustimulation combined with antiemetics did not prevent cisplatin-induced or oxaliplatin-induced nausea in 103 liver cancer patients who underwent a transarterial chemoembolization (TACE) procedure.[48] A single-blind, randomized, controlled trial in 2017 showed that transcutaneous electrical stimulation at P6, LI4, and ST36 acupoints did not significantly alleviate CINV associated with TACE, when compared with placebo in patients with liver cancer.[49] EA at P6, LI4, and ST36 points did, however, reduce anorexia scores more than SA.

A 2016 RCT showed that among 48 breast cancer patients receiving chemotherapy, patients randomly assigned to the auricular acupressure group (ear seed placed on point zero, stomach, brainstem, shenmen, and cardia) had significantly less intense and less frequent N/V in acute and delayed phases compared with the control group that had no auricular acupressure.[50] This study is limited by its small sample size and lack of placebo control. However, it describes an additional noninvasive method to control CINV that may deserve further investigation.

Researchers have attempted to augment the impact of acupressure on the antiemetic effects using certain methods, but they were not found to be effective.[51]

Fewer studies have been done on acupuncture effects on pediatric oncology patients. A 2018 RCT of 165 pediatric patients receiving chemotherapy with high emetogenic potential showed that acupressure bands at PC6 point were safe but did not improve CINV when compared with placebo wrist bands.[52]

Radiation-induced nausea and vomiting

Acupuncture has also been used to relieve radiation-induced N/V. In one randomized study, patients who were randomly assigned to receive either verum or SA experienced fewer episodes of N/V than did those who received standard care.[53]

Table 4. Randomized Controlled Trials of Acupuncture for Nausea and Vomiting from Chemotherapy or Radiation Therapya

ENLARGE

Reference/Sample Size	Cancer Type	Treatment Groupsb	Treatment Duration	Concurrent Therapyc	Level of Evidence Scored and Resultse
EA = electroacupuncture; N = number of patients; N/V = nausea and vomiting; SA = sham acupuncture.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially considered by the researcher who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported; historical control subjects are not included in number of patients enrolled.
cConcurrent therapy for symptoms treated (not cancer).
dStrongest evidence reported that the treatment under study has activity or improves the well-being of cancer patients. For information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
eThese results indicate statistically significant differences unless stated otherwise.
fP < .001, low-frequency EA at classical antiemetic acupuncture points daily versus minimal needling at control points with sham EA versus no adjunct needling.
gP < .05, acupuncture versus noninvasive placebo acupuncture.
hP < .001, EA versus sham EA.
iP < .001, surface electrodes versus rubber electrodes.
jP < .00059.
kP < .05, acupressure and acustimulation wrist bands versus no treatment.
lP < .02, acupressure versus acupressure at a sham point.
Chemotherapy-Induced Nausea and Vomiting
[54] (N = 104)	Breast	Group 1, electroacupuncture (N = 37); Group 2, sham electrostimulation (N = 33); Group 3, no needling (N = 34)	5 d	Yes, prochlorperazine	1sC; less N/V in EA groupf
[55] (N = 80)	Various cancers	Group 1, acupuncture (N = 41); Group 2, noninvasive placebo acupuncture (N = 39)	Unknown	Yes, ondansetron	1sC; no significant differences between groupsg
[56] (N = 142)	Ovarian	Group 1, acupuncture + vitamin B6 PC6 point injection (N = 48); Group 2, vitamin B6 (N = 46); Group 3, acupuncture (N = 48)	3 wk	Yes, granisetron	1iiC; significantly less emesis compared with control
[36,44,45] (N = 10)	Testicular	Group 1, EA (N = 10); Group 2, sham EA (crossover study) (N = 10)	Unknown	Yes, metoclopramide	1sC; significantly less N/V compared with controlh
[46] (N = 100)	Unknown	Group 1, surface electrodes (N = 27); Group 2, rubber electrodes (N = 11); Group 3, crossover study (N = 14); Group 4, transcutaneous electrical stimulation (N = 24)	5 d	Yes, metoclopramide, thiethylperazine, prochlorperazine, cyclizine	1iiC; significantly less N/V compared with controli
[47] (N = 16)	Unknown	Group 1, ondansetron plus transcutaneous electrical stimulation (N = 16); Group 2, crossover treatment ondansetron only (N = 16)	5 d	Yes, ondansetron	1iiC; significantly less N/V compared with controlj
[48] (N = 103)	Liver or liver metastasis from other primary cancer	Group 1, acustimulation at K1 acupoint (N = 51); Group 2, electrostimulation at placebo point on heel (N = 52)	5 d	Yes, tropisetron	1sC; no significant differences between the groups
[37] (N = 739)	Breast, hematologic neoplasms	Group 1, acupressure bands (N = 233); Group 2, transcutaneous electrical stimulation bands (N = 234); Group 3, no bands	5 d	Yes, 5-HT3 receptor antagonist, prochlorperazine, and/or others	1iiC; significantly less N/V in treatment groups compared with controlk
[57] (N = 53)	Unknown	Group 1, acupressure (N = 38); Group 2, crossover to acupressure at a sham point (N = 38)	Unknown	Yes, antiemetics	1sC; significantly less N/V compared with controll
[52] (N = 165)	Various cancers	Group 1, real acupressure bands (N = 83); Group 2, sham bands (N = 82)	Up to 7 d after chemotherapy	Yes, antiemetics	1sC; no significant differences noted between study groups
[58] (N = 36)	Breast	Group 1, acupressure (N = 17); Group 2, control (N = 19)	5 d	Yes, antiemetics	1iiC; significantly less N/V compared with control
[59] (N = 160)	Breast	Group 1, acupressure P6 (active) (N = 53); Group 2, acupressure S13 (placebo) (N = 53); Group 3, usual care (N = 54)	10 d	Yes, antiemetic	1sC; significantly less delayed N/V for acupressure compared with control
Radiation-Induced Nausea and Vomiting
[53] (N = 277)	Various cancers	Group 1, acupuncture (N = 109); Group 2, SA (N = 106); Group 3, standard care (N = 62)	Six treatments	Yes, antiemetics	1sC; significantly less emesis compared with control

Vasomotor symptoms

Some studies have reported that acupuncture may be effective in reducing vasomotor symptoms among postmenopausal women with breast cancer and prostate cancer patients receiving androgen-deprivation therapy.[60-66]

Six RCTs have studied the role of acupuncture in reducing hot flashes in breast cancer survivors.

In 2007, one study reported results from a randomized, sham-controlled trial on the effect of acupuncture in treating breast cancer survivors who experienced three or more hot flashes per day.[60] The investigators reported that the mean number of hot flashes per day at week 6 changed from 8.7 to 6.2 in the RA arm, and from 10.0 to 7.6 in the SA arm. However, the difference between the RA group and the SA group was not statistically significant (P = .3). When patients in the SA group crossed over to receive RA, their hot flash frequency further reduced from 7.6 to 5.8. The reduction in hot flashes in all patients persisted during the 6 months of follow-up (RA arm, 6.1 per day; SA arm, 6.8 per day). On the basis of fewer hot flashes in both groups, the authors concluded that acupuncture reduced hot-flash frequency, although the difference between the RA and SA groups was not statistically significant.[60]

In 2009, one study reported another randomized SA-controlled trial on the effect of acupuncture in treating women with breast cancer who suffered from hot flashes after receiving tamoxifen for at least 3 months.[67] Fifty-nine women were randomly assigned to either 15 sessions (5 weeks biweekly followed by 5 weeks weekly) of RA or SA. The authors reported that at the end of the treatment period, the mean number of daytime hot flashes was reduced significantly from 9.5 to 4.7 (P = .001) in the RA group and from 12.3 to 11.7 (P = .382) in the SA group. At 12 weeks follow-up, further reduction was observed in the RA group (from 4.7 to 3.2) but not in the SA group (from 11.7 to 12.1). The difference between the RA group and SA group was statistically significant (P < .001). The authors concluded that acupuncture provided effective relief from hot flashes in women with breast cancer who suffered from hot flashes while taking tamoxifen.[67] The evidence generated from these two trials suggests that acupuncture effectively decreases hot-flash frequency, although it is not clear whether it is superior to SA.

Another clinical trial compared the effects of EA with hormonal therapy in breast cancer survivors with vasomotor symptoms; in 19 of 27 women who completed 12 weeks of EA treatment, the number of hot flashes was significantly reduced from 9.6 per day to 4.3 per day. The improvement persisted at the 12-month follow up.[68] In the hormonal treatment group, the median number of hot flashes dropped from 6.6 at baseline to 0 at week 12. Although hot flashes decreased less in the EA group than in the hormonal treatment group, health-related QOL improved at least to the same extent. It suggests that EA could be further evaluated as treatment for women with breast cancer and climacteric complaints, particularly since hormonal treatment is no longer recommended for breast cancer survivors.[68]

In 2010, another RCT compared the effect of acupuncture with venlafaxine in treating vasomotor symptoms in breast cancer patients suffering from more than 13 hot flashes per week.[62] Changes in hot flash frequency from baseline and at 3-, 6-, 9- and 12-month follow-up were used as the primary outcome. Fifty patients were randomly assigned to 12 weeks (biweekly for 4 weeks, followed by weekly for 8 weeks) of acupuncture versus daily venlafaxine (37.5 mg for 1 week, then 75 mg for 11 weeks). The investigators observed a significant reduction in hot flash frequency and severity in both groups. In addition, 2 weeks after treatments were stopped, patients randomly assigned to venlafaxine reported increased hot-flash frequency, whereas the acupuncture group remained at a low level of hot flashes. There was no significant difference between the acupuncture arm and the venlafaxine arm. There were 18 reported adverse events (i.e., nausea, dizziness, headache) in the venlafaxine arm and none in the acupuncture arm. The authors concluded that acupuncture appears to be as effective as venlafaxine and is a safe and durable treatment option for breast cancer patients experiencing vasomotor symptoms.[62]

In 2013, a study reported the results of a three-arm RCT (N = 94) comparing RA (N = 31) with SA (N = 29) and usual care alone (N = 34) in reducing hot flashes in breast cancer survivors. In the acupuncture group, 16 (52%) patients experienced a significant reduction in hot flashes compared with 7 (24%) in the SA group (P < .05). There was also a statistically positive effect on sleep when RA was compared with SA. Importantly, the researchers measured the plasma estradiol level and determined that there was not a correlation between symptoms improvement and an increase in estradiol level.[69]

In 2014, a study reported the results of a two-arm RCT (N = 47) on the effect of acupuncture in reducing AIMSS and hot flashes as one of the secondary end points. When compared with baseline, acupuncture significantly improved hot-flash severity, frequency, and function. SA significantly improved the Hot Flash Related Daily Interference Scale only. However, there was no significant difference between the two groups.[70]

These trials once again confirmed that acupuncture is safe. They showed that acupuncture reduced hot flashes significantly when compared with baseline, although the benefit of RA versus SA was not clear.

A 2015 systematic review of acupuncture to control hot flashes in cancer patients showed that in all eight studies included in the review, acupuncture resulted in significant improvement from the baseline, and three studies showed RA was significantly better than SA in different aspects of hot flashes. However, none of the studies were rated with a low risk of bias.[71] A 2016 meta-analysis of 12 RCTs published before April 2015 on the efficacy of acupuncture or EA on breast cancer survivors suffering from hot flashes failed to show a favorable effect of acupuncture on reducing the frequency of hot flashes when compared with control groups such as SA, hormone therapy, antidepressants, or relaxation intervention.[72] The authors explained that this finding may be due to heterogeneity of the studies, small sample size of the studies, and the underlying methodological issues with some studies. Another 2016 systematic review of 12 RCTs (including eight in the aforementioned meta-analysis) found that all RCTs showed the effect of acupuncture when compared with no acupuncture. However, only two of the six RCTs comparing RA with SA showed significant benefit of acupuncture over placebo. The other studies showed that acupuncture was no better than hormone therapy, venlafaxine, or relaxation controls.[73] Consequently, there is insufficient evidence supporting or refuting using acupuncture to treat hot flashes. Further studies are needed.

A study published in 2015 that used EA in the treatment of hot flashes randomly assigned 120 breast cancer survivors who were suffering from hot flashes at least twice daily to one of four of the following arms: EA, SA, gabapentin (GP), and placebo pills (PP) for 8 weeks.[74] Unlike other acupuncture efficacy trials, however, the primary end point was the change in hot flash composite scores (HFCS) between SA and PP at week 8, with secondary end points including posttreatment comparisons of all groups at different time points and examination of treatment durability at week 24. It showed that SA produced significantly greater reductions in HFCS than did PP by week 8, indicating a greater placebo effect with SA. Although all arms experienced HFCS reductions, SA produced significantly better results than did both GP and PP interventions (EA, −7.4; SA, −5.9; GP, −5.2; and PP, −3.4), compared with baseline scores. In addition, SA had a smaller nocebo effect than PP, as evidenced by the significantly higher percentage of reported adverse events for PP (20.0%) compared with SA (3.1%). Another intriguing finding is the more-durable effect in HFCS reductions produced at week 24 (16 weeks posttreatment) with both EA and SA treatments (EA, −8.5; SA, −6.1) than with GP (GP, −2.8), suggesting that both types of acupuncture may elicit underlying physiologic changes not induced by pharmacologic intervention. On the other hand, the effect size of EA compared with SA was small at week 8 (Cohen’s d, 0.21) but got bigger at week 24 (Cohen’s d, 0.31), suggesting EA may produce additional or longer-lasting physiological effects than would SA.[74]

A 2016 pragmatic RCT (N = 190) that compared individualized acupuncture plus enhanced self-care (as described in an information booklet provided to all patients) with enhanced self-care alone showed that the combination therapy is superior to self-care alone in reducing hot flash scores at the end of treatment, at the 3-month follow-up visit, and at the 6-month follow-up visit.[75][Level of evidence: 1iiC] In addition, this highly impactful study also showed that acupuncture significantly improved patients’ QOL without any serious adverse effects.[75] It used the standard traditional Chinese medicine acupuncture approach, which first identified menopausal syndromes according to Maciocia’s recommendations and consequently chose individualized acupoints in addition to three common acupoints: SP6, LI11, and CV4.[75] This study provides solid evidence to support the use of acupuncture to reduce hot flashes and improve breast cancer survivors’ QOL. However, further research is needed to understand the mechanisms of how acupuncture may have reduced hot flashes.

Table 5. Summary of Randomized Controlled Trials of Acupuncture for Hot Flashes in Breast Cancer Patientsa

ENLARGE

Reference/Sample Size	Treatment Groupsb	Treatment Duration	Concurrent Therapy (Yes/No/Unknown)c	Level of Evidence Scored and Results
EA = electroacupuncture; GA = gabapentin; HFRDI = hot flash–related daily interference scale; hr = hour(s); HT = hormone therapy; N = number of patients; RA = real acupuncture; SA = sham acupuncture; SNRI = serotonin-norepinephrine reuptake inhibitor; SSRI = selective serotonin reuptake inhibitor.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially recruited/considered by the researchers who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported.
cConcurrent therapy for symptoms treated (not cancer).
dFor information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
eP < .001, acupuncture versus hormone therapy.
fP < .05, acupuncture versus placebo versus usual care.
[75] (N = 190)	Group 1, RA and enhanced self-care (N = 85); Group 2, enhanced self-care (N = 105)	12 wk	Yes, HT	1iiC; significantly less hot flashes than control.
[60] (N = 72)	Group 1, RA (N = 42); Group 2, SA (N = 30)	4 wk	Yes, SSRIs	1sC; RA was associated with 0.8 fewer hot flashes per day than SA at 6 wk. No statistical significant differences.
[67] (N = 59)	Group 1, RA (N = 30); Group 2, SA (N = 29)	10 wk	No	1sC; hot flash frequency and Kupperman index were reduced during the treatment period and during the 12 week follow-up.
[68] (N = 45)	Group 1, EA (N = 27); Group 2 HT (N = 18)	24 mo	Yes, estrogen/progesterone	1iiC; the median number of hot flashes/24 hr decreased from baseline to 12 wk of treatment in both groups.
[62] (N = 50)	Group 1, RA (N = 25); Group 2, venlafaxine (N = 25)	12 wk	Yes, venlafaxine	1iiC; acupuncture was as effective as venlafaxine.
[69] (N = 94)	Group 1, RA (N = 31); Group 2, SA (N = 29); Group 3, usual care (N = 34)	Weekly for 5 wk	Yes, clonidine, venlafaxine, mirtazapine, HT	1sC; 16 patients (52%) in the RA group had significant reduction of hot flashes compared with 7 patients (24%) in the SA groupf.
[74] (N = 120)	Group 1, EA (N = 30); Group 2, SA (N = 32); Group 3, GA (N = 28); Group 4, placebo pills (N = 30)	8 wk	Yes, HT, SSRIs, SNRIs	1sC; EA and SA had significant reduction of hot flashes compared with placebo.
[70] (N = 47)	Group 1, RA (N = 23); Group 2, SA (N = 24)	Weekly for 8 wk	Yes, venlafaxine	1sC; compared with baseline, RA significantly improved hot flash severity, frequency, and HFRDI; SA significantly improved HFRDI only. No significant difference between the two groups.

Cancer-related fatigue

Fatigue is a common symptom in patients with cancer and a frequent side effect of chemotherapy and radiation therapy. No effective treatment exists. Several RCTs have been conducted to study the effect of acupuncture in reducing cancer-related fatigue (refer to Table 6).

One pilot RCT enrolled 47 cancer patients experiencing moderate to severe cancer fatigue and randomly assigned them to one of three groups: acupuncture (N = 15), acupressure (N = 16), or SA (N = 16). Patients in the acupuncture group received six 20-minute acupuncture sessions during a 2-week period; patients in the two acupressure groups were taught to massage RA versus SA points daily for 2 weeks.[76] The Multidimensional Fatigue Inventory was used to assess their responses at baseline, and at week 2 and week 4 follow-up. At the end of week 2, general fatigue, physical fatigue, activity, and motivation significantly improved in the acupuncture and acupressure groups when compared with baseline. At the end of week 2, fatigue level improved by 36% in the acupuncture group, 19% in the acupressure group and 0.6% in the control group. Moreover, the improvement was maintained at the week 4 follow-up. Acupuncture was found to be a more effective method than acupressure or SA. The authors concluded that acupuncture showed a greater potential for managing cancer-related fatigue; further testing in a multicenter RCT with larger sample sizes is warranted.[76] A small randomized study of 28 patients with non-small cell lung cancer reported decreased fatigue and improved QOL with RA compared with SA. The effect was sustained during the 6-week observation period.[77]

A follow-up RCT (N = 302) by the same group of investigators was published in 2013; among the 246 evaluable patients, acupuncture significantly reduced cancer-related fatigue, anxiety, and depression, and improved QOL when compared with usual care.[78] The investigators again randomly assigned 197 patients to receive 4 weeks of therapist-delivered acupuncture (N = 65), self-acupuncture (N = 67), or no acupuncture (N = 65) to determine the effect of maintenance therapy for cancer-related fatigue, and found that there was no difference between the therapist-delivered acupuncture and self-acupuncture; there was a nonsignificant trend in improving fatigue when comparing the acupuncture groups with the no-acupuncture group (P = .07).[79]

Conversely, two RCTs showed no significant difference between RA and SA in reducing cancer-related fatigue (refer to Table 6).[80,81] One study reported in 2009 that among the 27 patients receiving daily radiation therapy, both weekly RA and SA treatment improved fatigue, fatigue distress, QOL, and depression from baseline to 10 weeks, but the differences between the two interventions were not significant.[80] In 2013, another study reported the results of an RCT of RA compared with SA involving 101 patients with postchemotherapy chronic fatigue; among the 74 evaluable patients, both groups had a one-point decrease in Brief Fatigue Inventory score; however, there was no statistically significant difference between the groups. This study was limited by the large number of patients (27) lost to follow up.[81]

The effect of acupuncture on cancer-related fatigue was also studied as one of the secondary end points in acupuncture for the AIMSS study published in 2014.[82] When compared with WLCs, EA significantly improved fatigue, anxiety, and depression, although SA did not improve fatigue or anxiety but did improve depression.[82] In this study, the investigators did not compare EA with SA directly because the study was not powered to detect a difference between EA and SA, especially for secondary end points. Lastly, an Australian pilot study (N = 30) showed that when compared with controls, acupuncture significantly reduced fatigue and improved well-being in breast cancer patients with posttreatment fatigue.[83]

These results showed that acupuncture significantly improved fatigue when compared with usual care alone, although whether it is significantly better than SA will warrant further study.

A 2016 pilot RCT of 78 cancer survivors with cancer-related fatigue showed that infrared laser acupuncture point stimulation was safe in cancer patients and that patients who received infrared laser acupuncture point stimulation on ST36, CV4, and CV6 acupoints 3 times per week for 4 weeks had less fatigue than those who received sham treatment at the end of treatment (3.01 vs. 4.40; P = .002), and the effect lasted to week 8.[84] In addition, a 2016 large RCT of 288 breast cancer survivors with persistent fatigue (NCT01281904) showed that two types of acupressure (relaxing and stimulating) significantly reduced cancer fatigue.[85] Post hoc analysis revealed that acupressure was associated with reduced anxiety, pain, and depressive symptoms when compare with usual care.[86]

Table 6. Summary of Pilot Studies of Acupuncture for Cancer Fatiguea

Reference/Sample Size	Treatment Groupsb	Treatment Duration	Level of Evidence Score and Resultsd
BFI = Brief Fatigue Inventory; CI = confidence interval; EA = electroacupuncture; N = number of patients; QOL = quality of life; RA = real acupuncture; SA = sham acupuncture; WLC = wait-list control.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially recruited/considered by the researchers who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported.
cConcurrent therapy for symptoms treated (not cancer).
dStrongest evidence reported that the treatment under study has activity or otherwise improves the well-being of cancer patients. For information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
eP < .001, acupuncture versus usual care.
fP < .10, education and acupuncture versus usual care.
gP = .0095, acupuncture versus WLC group in the improvement of fatigue.
hP = .044, acupuncture versus WLC group in the improvement of anxiety.
iP = .015, acupuncture versus WLC group in the improvement of depression.
jP = .058, acupuncture versus WLC group in the improvement of sleep disturbance.
kP = .0088, SA versus WLC group in the improvement of fatigue, anxiety, and depression.
[76] (N = 47)	Group 1, acupuncture: six 20-minute sessions during 2 wk (N = 15); Group 2, acupressure: massage acupoints daily (N = 16); Group 3, SA: massage no acupoints daily (N = 16)	2 wk	1sC; both acupuncture and acupressure significantly reduced cancer fatigue. Acupuncture was a more effective method than acupressure or sham acupressure.
[78] (N = 302)	Group 1, acupuncture: once per wk for 6 wk (N = 227); Group 2, usual care (N = 75)	6 wk	1iiC; acupuncture significantly improved fatigue (-3.11; 95% CI, -3.97 to -2.25)e.
[87] (N = 13)	Group 1, education integrated with acupuncture (N = 6); Group 2, usual care (N = 7)	Improve self-care for 4 wk; acupuncture for 8 wk	1iiC; a 2.38-point decline in fatigue as measured by the BFI when compared with usual care control (90% CI, 0.586–5.014)f.
[80] (N = 27)	Group 1, RA (N = 16); Group 2, SA (N = 11)	Once to twice per wk during the 6-wk course of radiation therapy	1sC; both groups had improvement in fatigue, fatigue distress, QOL and depression from baseline to wk 10, but no statistically significant intergroup difference.
[81] (N = 101)	Group 1, RA (N = 34); Group 2, SA (N = 40)	Weekly for 6 wk	1sC; 74 (34 RA; 40 SA control) patients were evaluable. No significant difference of BFI scores between groups.
[82] (N = 67)	Group 1, EA (N = 22); Group 2, SA: Steinberg needles (N = 22); Group 3, WLC (N = 23)	10 treatments during 8 wk	1sC; compared with the WLC, EA improved fatigueg, anxietyh, and depressioni during the 12-wk intervention and follow-up period. In contrast, SA did not reduce fatigue or anxiety symptoms but did improve depression compared with the WLC .
[83] (N = 30)	Group 1, acupuncture (N = 10); Group 2, SA (N = 10); Group 3, WLC (N = 10)	Six treatments in 8 wk	1sC; acupuncture significantly reduced fatigue in 2 wk and improved well-being in 6 wk.
[84] (N = 78)	Group 1, laser acupuncture point stimulation (N = 39); Group 2, sham laser acupuncture point stimulation (N = 39)	Once every other day (3x/wk for 4 wk) for a total of 12 sessions	1sC; less fatigue in the treatment group

Xerostomia

A number of clinical studies have investigated the effect of acupuncture for the treatment and prevention of xerostomia in nasopharyngeal carcinoma and head and neck cancer patients.

Acupuncture was associated with a decrease in the onset of symptoms and an increased saliva flow in two randomized studies that compared acupuncture with standard care for preventing xerostomia in patients undergoing radiation therapy.[88,89]

Compared with standard care, acupuncture significantly improved xerostomia symptoms in patients who experienced the condition following radiation therapy.[21,90]

Two RCTs, one for prevention, and one for treatment of radiation-induced xerostomia revealed increases in salivary flow rates following RA and SA (superficial needling 1 or 2 cm away from acupuncture points), although differences between groups were not significant.[91,92] It also reported improvements in QOL after acupuncture treatment, but there were no significant differences between the groups.[92]

In 2012, one group published two studies on the effect of acupuncture for preventing xerostomia. The first was a pilot study (N = 23); when compared with SA, RA significantly reduced xerostomia questionnaire scores from week 3 through the 1-month follow-up after radiation therapy. However, they did not find significant difference in salivary flow rates between the groups.[93] The other study (N = 86) showed that when compared with standard care acupuncture significantly lowered the xerostomia questionnaire scores in weeks 3 to 6 during 6 weeks of chemoradiation therapy. In addition, greater saliva flow was noticed in the acupuncture group than in the control group at weeks 7 and 11 and at the 6-month follow-up.[88]

Another study examined long-term effects of acupuncture on xerostomia.[94] Patients who received RA were followed for 6 months and up to 3 years. Compared with baseline, significant differences in salivary flow rates were seen in patients 6 months after acupuncture treatment. At 3 years, patients who received additional acupuncture exhibited greater saliva flow rates than patients who did not continue acupuncture treatment.

Two ongoing phase III clinical trials are evaluating the effect of acupuncture for treatment (NCT01141231 and NCT01266044) of xerostomia in head and neck cancer patients. Information about ongoing clinical trials is available from the NCI website.

The findings from these studies are summarized in Table 7 below.

Table 7. Summary of Randomized Controlled Trials of Acupuncture for Radiation-Induced Xerostomiaa

Reference/Sample Size	Treatment Groupsb	Treatment Duration	Concurrent Therapy (Yes/No/ Unknown)c	Level of Evidence Score and Resultsd
N = number; RA = real acupuncture; SA = sham acupuncture.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially considered by the researcher who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported.
cConcurrent therapy for symptoms treated (not cancer).
dStrongest evidence reported that the treatment under study has anticancer activity or otherwise improves the well-being of cancer patients. For information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
[92] (N = 12)	Group 1, SA: nonactive acupuncture points located 2 cm away from real points (N = 6); Group 2, RA (N = 6)	6 wk	Unknown	1sC; improved symptoms
[91] (N = 38)	Group 1, acupuncture (N = 20); Group 2, SA (N = 18)	Unknown	Unknown	1sC; increased salivary flow rates
[88] (N = 86)	Group 1, acupuncture (N = 40); Group 2, control (N = 46)	7 wk	No	1iiC; symptoms improved and salivary flow increased
[90] (N = 145)	Group 1, oral care followed by acupuncture (N = 75); Group 2, acupuncture followed by oral care (N = 70)	8 wk	No	1iiC; symptoms improved
[93] (N = 23)	Group 1, acupuncture (N = 11); Group 2, SA (N = 12)	Unknown	No	1sC; symptoms improved only

Chemotherapy-induced peripheral neuropathy

Chemotherapy-induced peripheral neuropathy (CIPN), a common side effect of several chemotherapeutic agents, includes a variety of symptoms, such as paresthesia, pain, and muscle weakness.[95] CIPN can be serious enough to limit or delay the dose of administered chemotherapy and may warrant discontinuation of treatment. Long-term CIPN often produces substantive functional decline and diminished QOL.[96,97] For patients with persistent CIPN, treatment has been limited to symptom management with narcotics, antidepressants, and antiepileptics.[96] Studies suggest that analgesic regimens typically produce only modest relief of pain and are commonly associated with side effects such as dizziness, sedation, dry mouth, and constipation.[96]

CIPN from platinum-containing agents or taxanes

There have been several studies investigating the use of acupuncture treatment to alleviate CIPN. Two small nonplacebo-controlled studies (N = 5 [98] and N = 6 [99]) have shown preliminary evidence that MA can improve CIPN symptoms. A three-arm RCT (N = 90) that examined the use of auricular acupuncture to treat chronic peripheral or central neuropathic pain in cancer patients after treatment found a significant reduction in pain at 2 months compared with sham-controlled patients.[13] Another RCT that randomly assigned patients to either EA (N = 14), hydroelectric baths (N = 14), high-dose B vitamins (N = 15), or placebo (N = 17) reported no significant change in pain when treatments were compared with placebo.[100]

At least one research group has investigated if acupuncture could prevent the progression of CIPN in patients actively undergoing chemotherapy. In a phase IIA trial of acupuncture to prevent progression of CIPN severity from weekly paclitaxel in breast cancer patients, 26 of 27 patients did not experience a progression from grade II to grade III neuropathy, yielding a significantly lower progression than expected from historical controls, meeting the prespecified endpoint for the study warranting further investigation.[101]

CIPN from bortezomib or thalidomide

Studies evaluating the effects of acupuncture on bortezomib and/or thalidomide-induced peripheral neuropathy have also shown promising results. Two studies of patients with multiple myeloma (N = 27 [102] and N = 19, electroacupuncture [103]) concluded that acupuncture was safe and effective in treating CIPN after 10 weeks and 9 weeks of treatment, respectively. Another larger study (N = 104) randomly assigned patients to receive either methylcobalamin or acupuncture and methylcobalamin. This study reported a greater reduction in CIPN pain and improvement in daily functioning in the acupuncture group.[104]

Lymphedema

Treatment-induced lymphedema may be a lifelong concern for some breast cancer survivors. There have been a number of case reports, retrospective chart reviews, and pilot studies demonstrating that acupuncture was safe and potentially effective in reducing swelling and improving symptoms in patients with upper- and lower-extremity edema.[105-108] A 2016 qualitative study of 23 breast and head and neck cancer patients with lymphedema who completed acupuncture and moxibustion treatments showed that patients viewed acupuncture and moxibustion as a valuable whole-person approach that helped them improve their energy and decrease pain.[109]

A 2013 single-arm clinical trial (N = 37) evaluated the safety and potential efficacy of acupuncture in treating patients with breast cancer–related lymphedema (BCRL).[108] In this trial, the investigators enrolled 37 breast cancer survivors with moderate to severe unilateral chronic BCRL; the survivors received eight sessions of standard acupuncture treatment given twice per week for 4 weeks. Four patients were not able to be evaluated because of early withdrawal. Acupuncture was deemed to be safe; no serious adverse events were reported after 255 acupuncture treatment sessions. Twelve of the 33 evaluable patients reported at least one incidence of mild bruising or minor pain/tingling in the arm, shoulder, or acupuncture site; no infections were reported, although the standard acupuncture treatment protocol involved inserting four acupuncture needles in the limb with lymphedema. This pilot study, although not an RCT, suggested a trend toward efficacy with a mean reduction in arm circumference of 0.90 cm in patients who received acupuncture treatment; eleven patients (33%) experienced at least a 30% reduction in arm circumference. Two patients did not use any additional lymphedema treatment during the trial. Most patients (28 of the remaining 31 patients) reported making no changes in their standard regimens to treat lymphedema during treatment. The authors concluded that acupuncture for BCRL is safe and may be effective. The same research group is conducting an RCT to further determine the efficacy of acupuncture in reducing BCRL symptoms (NCT01706081). However, in 2014, a pilot RCT of 17 women that compared acupuncture with usual care showed that 12 acupuncture treatments on the nonlymphedematous limb during 8 weeks did not change extracellular fluid or any patient-reported lymphedema outcomes.[110] The authors concluded that acupuncture may stabilize symptoms; however, further study is needed.

A 2016 RCT of 30 patients showed that warm acupuncture (acupuncture and moxibustion) improved BCRL in 51% of patients compared with 26% of patients treated with oral diosmin in the control group.[111] No adverse reaction was reported in the acupuncture and moxibustion group. The acupuncture and moxibustion group also had significant improvement in shoulder joint range of movement and QOL compared with the control group.

A RCT of acupuncture versus usual care WLC studying 82 BCRL patients did not show a significant difference in arm circumference or bioimpedance.[112]

Ileus

Three RCTs have studied the effect of acupuncture in reducing the duration of postoperative ileus and have generated conflicting results. In 2010, one study reported the results of an RCT studying the effect of EA compared with usual care and found that EA did not significantly prevent prolonged postoperative ileus.[113]

In 2012, another study reported the results of a phase II RCT that compared RA with SA (N = 90) for reducing postcolectomy ileus. No significant differences were reported between RA and SA in reducing postcolectomy ileus as measured by the time that the patient first tolerated solid food and the time that the patient first passed flatus or a bowel movement.[114]

In 2013, a third study reported the results of a three-arm RCT (N = 165) that compared EA with SA and no acupuncture in reducing duration of postoperative ileus after laparoscopic surgery for colorectal cancer. EA significantly shortened the time to defecation and the hospital stay compared with SA and no acupuncture.[115]

A 2017 systematic review and meta-analysis of 10 RCTs involving 776 cancer patients showed that acupuncture was associated with earlier recovery of bowel function (shorter time to first flatus and defecation) compared with the control (no acupuncture, or SA or other types of active treatments).[116] However, the data quality was deemed low because of the high risk of bias stemming from small sample sizes and methodological limitations.

Sleep

A number of RCTs have studied the effect of acupuncture in improving depression and sleep quality in cancer patients. In 2011, one study (N = 80) reported that acupuncture significantly improved depression and sleep quality when compared with fluoxetine. Patients receiving acupuncture reported significantly greater reductions in Self-rating Depression Scale, Hamilton Depression Rating Scale, and Pittsburgh Sleep Quality Index scores.[117]

A 2019 RCT of cancer survivors reported that even though both cognitive behavioral therapy for insomnia (CBT-I) and acupuncture produced a clinically significant reduction in insomnia severity, CBT-I is superior to acupuncture. Subgroup analyses showed that acupuncture was more effective than CBT-I in pain reduction and that CBT-I was more effective in highly educated white males with no pain at baseline.[118] The effect of acupuncture on sleep was also studied as one of the secondary end points in acupuncture for an AIMSS study published in 2014.[82] When compared with WLCs, EA resulted in a nonsignificant improvement in sleep disturbance (P = .058).[82] Further studies are warranted.

Other treatment-related side effects

A 2017 RCT comparing acupuncture with SA in 60 multiple myeloma patients undergoing bone marrow transplantation (BMT) showed that even though acupuncture did not significantly improve overall symptoms during and 15 days after BMT compared with SA, it was significantly more efficacious in reducing nausea, lack of appetite, and drowsiness at 15 days after BMT.[119] Patients who received SA were more likely to increase pain medication usage post-BMT.

Many studies have reported on the effects of acupuncture on cancer or other cancer treatment–related symptoms, including weight loss, cough, hemoptysis, fever, anxiety, depression, proctitis, dysphonia, esophageal obstruction, and hiccups.[1,8,61,120-124] These studies were from China,[1,121-123] Japan,[61] and Sweden.[8,29,120,124] The findings from these studies are summarized in Table 8 below.

Table 8. Clinical Studies of Acupuncture for Other Cancer-Related Symptoms or Cancer Treatment–Related Side Effectsa

ENLARGE

Reference/Sample Size	Type of Study	Condition Treated	Treatment Groupsb	Treatment Duration	Concurrent Therapy (Yes/No/ Unknown)c	Level of Evidence Score and Resultsd
ANC = absolute neutrophil count; AVLT = auditory-verbal learning test; BMT = bone marrow transplantation; CDT = clock-drawing test; FACT-COG = functional assessment of cancer treatment cognition test; N = number; RA = real acupuncture; RCT = randomized controlled trial; SA = sham acupuncture; WLC = wait-list control.
aRefer to text and the NCI Dictionary of Cancer Terms for additional information and definition of terms.
bNumber of patients treated plus number of patient controls may not equal number of patients enrolled; number of patients enrolled equals number of patients initially considered by the researcher who conducted a study; number of patients treated equals number of enrolled patients who were given the treatment being studied AND for whom results were reported.
cConcurrent therapy for symptoms treated (not cancer).
dStrongest evidence reported that the treatment under study has anticancer activity or otherwise improves the well-being of cancer patients. For information about levels of evidence analysis and an explanation of the level of evidence scores, refer to Levels of Evidence for Human Studies of Integrative, Alternative, and Complementary Therapies.
eP < .001, versus baseline.
[1] (N = 76)	RCT	Symptoms of weight loss, cough, thoracodynia, hemoptysis, fever, and side effects of chemotherapy and radiation therapy	Group 1, acupuncture (N = 38); Group 2, no acupuncture (N = 38)	Unknown	No	1iiC; weight gain, symptom relief, fewer side effectse
[76] (N = 47)	RCT	Cancer-related fatigue	Group 1, acupuncture (N = 15); Group 2, acupressure (N = 16); Group 3, SA (N = 16)	4 wk	No	1sC; improved fatigue levels
[111] (N = 30)	RCT	Breast cancer–related lymphedema	Group 1, warm acupuncture at 6 acupoints (N = 15); Group 2, control group received 900 mg diosmin tablets (N = 15)	Acupuncture, 30 min on alternate days for 30 d; diosmin 3 times a day for 30 d	Unknown	1iiC, significant reduction in upper arm lymphedema compared with diosmin
[112] (N = 82)	RCT	Breast cancer–related lymphedema	Group 1, RA (N = 40); Group 2, WLC (N = 42)	Twice weekly for 6 wk	Yes, massage, compression garments, exercise, or wraps	1iiC; no significant difference between groups for arm circumference difference or bioimpedance difference
[125] (N = 80)	RCT	Chemotherapy-related cognitive impairment	Group 1, RA (N = 40); Group 2, control (N = 40)	5x/wk for two 4-wk courses	Unknown	1iiC; treatment group had significantly higher scores on FACT-COG, AVLT3, and CDT compared with baseline
[119] (N = 60)	RCT	Nausea, decreased appetite, and drowsiness in multiple myeloma patients after BMT	Group 1, RA (N = 29); Group 2, SA (N = 31)	5 d for 20 min each treatment or until ANC dropped below 200/μl or platelet count dropped below 20,000/μl	Yes	1sC; acupuncture group had less severe symptoms of nausea, appetite loss, and drowsiness than sham acupuncture
[61] (N = 79)	Nonconsecutive case series, surveyed retrospectively	Unspecified symptoms (including pain, xerostomia, hot flashes, nausea/loss of appetite) from cancer or cancer treatment	79 traditional Chinese acupuncture, auricular acupuncture, percutaneous nerve stimulation, Korean hand acupuncture, or Japanese scalp acupuncture; none	Unknown	Yes, standard medical therapies	3iiiC; 60% showed at least 30% improvement
[121] (N = 44)	Nonconsecutive case series	Radiation proctitis in women treated for cervical cancer	Acupuncture (N = 44); none	Unknown	No	3iiiC; radiation proctitis resolved in 73% of patients: no blood or mucus for 15 days
[105] (N = 24)	Nonconsecutive case series	Postoperative lower-extremity lymphedema in women treated for gynecologic tumors	Group 1, acupuncture and moxibustion (N = 24); Group 2, control group, none	5x/wk during hospitalization and two times/wk at outpatient clinic	Unknown	3iiiC; edema prevented or markedly reduced
[126] (N = 35)	Nonconsecutive case series	Symptoms related to lymphedema (including pain, discomfort, anxiety, and insomnia)	Group 1, acupuncture and moxibustion (N = 30); Control group, none	2 wk with 4- and 12-wk follow-up	Unknown	3iiiC; symptoms improved
[124] (N = 16)	Retrospective case series	Hiccups	Group 1, acupuncture (N = 16); Control group, none	1–7 d	Unknown	3iiiC; symptom relief

In an RCT,[1] 76 patients with various types of cancer, including 38 with esophageal cancer, 24 with gastric cancer, and 14 with lung cancer, were randomly assigned to two groups (N = 38 per group). The treatment group received acupuncture in combination with radiation therapy or chemotherapy, and the control group was treated with radiation therapy or chemotherapy alone. The data showed that the patients in the acupuncture group gained significantly more body weight than patients in the control group (P < .001). In patients with lung cancer, the acupuncture group also showed greater improvement than the controls in the symptoms of cough, thoracodynia, hemoptysis, and fever; in patients with esophageal cancer, the acupuncture group showed greater improvement in the symptoms of chest pain, mucus vomiting, and difficulty in swallowing. In addition, the acupuncture group suffered fewer side effects (e.g., poor appetite, N/V, dizziness, or fatigue) from radiation therapy or chemotherapy than the control group. However, no statistical analysis was performed on these data. An RCT of 138 postoperative cancer patients treated with acupuncture plus massage showed decreased pain (P = .05) and a decrease in depressive mood (P = .003) compared with usual care.[20]

A retrospective study involved patients at an oncology clinic who were offered acupuncture treatment for potential palliation of symptoms.[120] Among 89 patients treated with acupuncture, 79 responded to a telephone questionnaire survey. The data indicated that the major reasons for referral included pain (53%), xerostomia (32%), hot flashes (6%), and nausea/loss of appetite (6%). Sixty percent of the patients showed at least 30% improvement in their symptoms, and about one-third had no change in the severity of symptoms. Patients were not questioned about acupuncture-treatment expectations.

Current Clinical Trials

Use our advanced clinical trial search to find NCI-supported cancer clinical trials that are now enrolling patients. The search can be narrowed by location of the trial, type of treatment, name of the drug, and other criteria. General information about clinical trials is also available.

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Bao T, Iris Zhi W, Vertosick EA, et al.: Acupuncture for breast cancer-related lymphedema: a randomized controlled trial. Breast Cancer Res Treat 170 (1): 77-87, 2018. [PUBMED Abstract]
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