Chemotherapy-Induced Nausea and Vomiting

What is Chemotherapy-Induced Nausea?

Chemotherapy-induced nausea and vomiting is nausea, retching or vomiting that follows chemotherapy. It affects quality of life and can discourage people from continuing treatment.^[1]

Common symptoms

Doctors describe five forms: acute (soon after treatment), delayed (days later), anticipatory (triggered by the thought or setting of treatment), and nausea that occurs despite preventive medicine, either occasionally or repeatedly.^[1]

• Queasiness or a need to vomit, with or without actual vomiting
• Loss of appetite and difficulty eating or drinking
• Nausea that returns on later days of a cycle
• Worry or dread before the next cycle^[1]

Causes and risk factors

The main cause is the chemotherapy drugs, which trigger nausea signals in the gut and brain, and some drugs are far more likely to do so than others.^[1]

How it is diagnosed and treated conventionally

Nausea is identified from your own report, and your oncology team plans prevention before each cycle according to how likely your chemotherapy is to cause vomiting. Standard treatment often combines 5-HT3 receptor antagonists, NK1 receptor antagonists and corticosteroids.^[1]

Major guidelines from ASCO, NCCN, MASCC/ESMO and Cancer Care Ontario share many fundamentals, though less is known about low and minimal risk regimens.^[2] Despite effective drugs, nausea, especially delayed nausea, remains a real problem for many patients.^[1]

Why Chemotherapy-Induced Nausea calls for a whole-person approach

Nausea after chemotherapy is mainly a drug effect, but it can also be triggered by anticipation of treatment, and it affects appetite and quality of life. Guidelines therefore plan prevention in advance of each cycle.^{[1, 2]}

Complementary therapies may add to medical prevention. Their role is to ease symptoms alongside it, not to replace antiemetic drugs.

Delayed nausea

Delayed nausea is often the hardest to control.^[1] In a trial of acupuncture added to standard triple antiemetic therapy, a post hoc analysis found a higher complete protection rate in the delayed phase but no significant difference in the acute phase.^[3]

Anticipatory symptoms and stress

Nausea can be triggered by anticipation of treatment.^[1] In a trial of ear acupressure, a sham version also helped a great deal, which suggests that attention, expectation and relaxation may contribute to the benefit.^[4]

Appetite and nutrition

Prolonged nausea can lead to poor intake and malnutrition.^[5] In a placebo-controlled trial, people taking ginger had less delayed nausea, less malnutrition and better nausea-related quality of life.^[6]

Acupuncture for Chemotherapy-Induced Nausea

What the research shows

Research suggests acupuncture may reduce chemotherapy-induced nausea and vomiting when added to anti-nausea medicine, but most of the evidence is low certainty. A 2023 meta-analysis of 38 trials with 2,503 patients found acupuncture added to usual care may improve control of acute and delayed vomiting. It found no effect on the other outcomes, and rated the certainty of evidence as low or very low.^[7] A broader overview of 51 acupuncture reviews listed nausea and vomiting among conditions that may benefit, but rated most of the reviews as low or very low methodological quality.^[8]

The best single trial is from China. In 239 women with breast cancer having highly emetogenic chemotherapy and standard three-drug antiemetic treatment, real electroacupuncture raised the rate of complete protection to 52.9% from 34.5% with sham electroacupuncture. Nausea was also lower, although the overall rate of vomiting did not differ.^[3] A French multicenter trial of 115 patients who still had nausea despite guideline-based medicines found that semi-permanent needles at the P6 wrist point, the ear, or both reduced nausea at 24 hours, but they did not reduce vomiting.^[9]

Acupressure uses finger pressure at the same points instead of needles. A 2024 review of 14 studies (10 trials and 4 earlier reviews) concluded that P6 and ear acupressure were effective complementary therapies for chemotherapy nausea and vomiting.^[10] In a breast cancer trial of 114 patients, real and sham ear acupressure both reduced acute nausea more than standard care alone, with real acupressure slightly better, and the authors judged that a large part of the benefit was a placebo effect.^[4] A Society for Integrative Oncology guideline recommends acupressure and acupuncture for chemotherapy-induced nausea and vomiting in people with breast cancer.^[11]

For moxibustion, a Cochrane review of 29 trials found low-certainty evidence that it may reduce nausea and vomiting scores when added to standard care, but it could not rule out benefits or risks and said better studies are needed.^[12]

How acupuncture may work

How acupuncture affects nausea is not settled. Because some of the benefit in sham-controlled trials appears in sham groups too, attention and expectation likely contribute alongside any specific effect of needling.^{[3, 4]} These are proposed explanations, not established facts.

What treatment involves

Treatment uses fine, sterile, single-use needles placed at points chosen for you, such as on the forearm and abdomen, usually left in place for about 20 to 40 minutes. Timing is often arranged around your chemotherapy schedule, and we reassess after a short course of visits. Trials gave treatment around the time of chemotherapy.^{[3, 9]}

Side effects are usually minor. In prospective studies, about 9 in 100 patients had a minor reaction such as bleeding, soreness or redness at a needle site, and serious events occurred in about 1 in 10,000.^[13]

Tell the practitioner first if you have a low platelet count or low white blood cell count, a bleeding disorder, take blood thinners, have lymphedema in a limb, are pregnant, or have a pacemaker (relevant to electroacupuncture). Needling may need to wait for your oncology team's agreement when your blood counts are low.

Ayurvedic medicine for Chemotherapy-Induced Nausea

The Ayurvedic view

In Ayurveda, nausea and vomiting are traditionally linked to disturbed digestion (agni) and to aggravated Pitta and Kapha, and ginger is a classic digestive herb. This is a traditional framework, not a biomedical diagnosis.

Therapies that may be used

Care is chosen for the individual and is gentle in this setting:

• Small, regular, easily digested meals and warm fluids, as your oncology and dietitian advice allows
• Mild digestive spices such as ginger, if your oncologist agrees; ginger has been tested in trials, described under herbal medicine below^[6]
• Rest and calming routines around treatment days

Ayurvedic products vary in quality: in one study, about one fifth of those bought online contained detectable lead, mercury or arsenic, so any product must come from a tested source.^[14]

Panchakarma, including vomiting and purgation therapies, is not appropriate for people having chemotherapy, and in general it is not appropriate during pregnancy, acute illness or frailty. We would not use it for this symptom.

What the research shows

We found no clinical trials and no systematic reviews of Ayurvedic treatment for chemotherapy-induced nausea and vomiting in PubMed. The Ayurvedic care described here is traditional practice, and any benefit for this symptom is unknown. Ginger, which features in Ayurveda, has been studied in trials that are discussed under herbal medicine.

Herbal medicine for Chemotherapy-Induced Nausea

Herbs and formulas that have been studied

Ginger has been studied in many trials of chemotherapy nausea, mostly as capsules and, in some Chinese trials, as ginger-partitioned moxibustion.^[15] Chinese herbal formulas containing Pinellia ternata (banxia) are widely used in China with 5-HT3 antiemetic drugs.^[16]

What the research shows

The evidence is limited and mixed. A 2024 overview of 15 ginger meta-analyses supported ginger for chemotherapy nausea and vomiting but rated their methodological quality as critically low to low.^[17] A 2022 review of 23 trials found no significant difference in nausea or delayed vomiting overall, though acute vomiting was lower in one subgroup.^[5] A 2025 meta-analysis of 35 trials reported that ginger capsules with standard antiemetics reduced severe nausea and vomiting, and called for more rigorous trials.^[15]

An Australian double-blind placebo-controlled trial of 103 adults found less delayed nausea and better nausea-related quality of life with ginger, and no effect on acute nausea or vomiting.^[6]

A meta-analysis of 22 trials of Pinellia ternata-containing formulas with 5-HT3 drugs found better clinical response and appetite than the drugs alone, but the authors said more high-quality trials are needed.^[16] A review of Chinese herbal medicine in breast cancer chemotherapy found possibly less nausea and vomiting, but the trial quality was unsatisfactory and no confident conclusion could be drawn.^[18] The Society for Integrative Oncology guideline found no strong evidence supporting ingested dietary supplements for breast cancer treatment side effects.^[11]

Safety and herb-drug interactions

Herbs are active substances, and in people having chemotherapy the cautions matter more. Case reports describe bleeding when warfarin was combined with herbs including ginger, ginseng, dang gui, dan shen and Boswellia, so ginger and other herbs need a practitioner's review if you take blood thinners.^[19] Tell us about every medicine you take, including chemotherapy and antiemetics, and let your oncologist know about any herb before you start it.

In one study, about one fifth of Ayurvedic products bought online contained detectable lead, mercury or arsenic.^[14] Herbs should come from tested sources and be prescribed individually. Tell us if you are pregnant or breastfeeding, have liver or kidney disease, or have surgery planned.

Translating traditional medicine into modern biological language

The links drawn here are interpretation, not equivalence. Chinese medicine often describes chemotherapy nausea as stomach qi rising against its normal downward direction, and the P6 wrist point is traditionally used for it. Researchers studying nausea instead look at signals between the gut and brain, which the anti-nausea drugs block.^[1]

Ayurveda's disturbed agni describes weak or irregular digestion. No study has shown that these concepts correspond to a specific biological process, and the part of the benefit seen in sham-controlled trials suggests expectation and relaxation may matter too.^[4]

How this care fits with your medical care

For a condition like this, we ask that you are under a physician's care for it and that your treating team knows you are receiving complementary care. Integrative care is added to, never substituted for, your oncology team's anti-nausea plan. Do not stop, skip or change antiemetics or any prescribed treatment without your prescriber.

We do not treat the cancer or manage chemotherapy. Please bring your diagnosis, chemotherapy schedule, a full list of medicines and supplements, and recent blood counts. Nausea that is not controlled should be reported to your oncology team, since they can change the antiemetic plan.

When to seek urgent medical care

Persistent vomiting can lead to dehydration and other problems that need prompt care.

• Unable to keep down fluids or medicines for 24 hours or more
• Signs of dehydration, such as very dark urine, dizziness or no urine for many hours
• Fever or chills during chemotherapy
• Vomiting blood, or black or bloody stools
• Severe abdominal pain or a swollen, hard belly
• Confusion, severe weakness or fainting

If any of these occur, call your oncology team right away. For an emergency, call 911 or go to the nearest emergency department.