Complementary and Integrative Medicine

Complementary medicine means practices used alongside standard cancer treatment. It does not replace that treatment. This is different from alternative medicine, which replaces standard treatment. That difference matters a lot for your safety. It is worth knowing clearly before you try anything new.

Integrative care combines standard treatment with supportive practices used alongside it. Meditation for stress is one example. Acupuncture for treatment-related nausea is another. How strong the evidence is differs a great deal from one practice to the next, and so does the safety picture: acupuncture, for instance, needs more care when platelets are low or the immune system is suppressed. Ask your team what the evidence looks like for the specific thing you are considering, and whether it is safe for you at this point in treatment. Alternative medicine means using something instead of standard treatment. A special diet used in place of chemotherapy is one example. This second path is risky. No special diet can slow cancer, cure it, or stop it from coming back.

Mind-body practices include meditation, yoga, tai chi, and guided imagery. People often use these for stress. Touch-based practices include massage and chiropractic care. Some people try reiki, a form of energy healing. Others try acupuncture, which comes from traditional Chinese medicine. Some people use vitamins, herbs, and other supplements. This last group needs the most caution.

"Natural" does not mean safe. Herbal supplements can cause real harm. Some can hurt your liver. Some can block how well your cancer drugs work. St. John's Wort is one example. It can weaken certain cancer drugs. Dietary supplements are regulated differently from medicines. A prescription drug has to be shown to be safe and effective before it can be sold. A supplement does not go through that approval; the manufacturer is responsible for its safety, and the FDA mostly acts after a product is already on sale. So what is in the bottle, and how much, is far less certain than with a prescription. Because of this, always check with your team before you start any supplement. Do this even if it seems gentle or natural.

Tell your oncologist about every supplement, vitamin, and other practice you use. Do this even for things that seem harmless. Your team needs the full picture. That is how they catch a problem before it starts. You will not be judged for asking. Doctors expect these questions. They want this information, because it keeps you safe.

Ask what proof exists that a practice actually helps. Ask whether it could affect your current treatment. Ask about the training of anyone you see for this. Ask if they will work with your cancer team, not around it.

Many complementary practices have real evidence behind them. Meditation or gentle yoga can ease stress, pain, or nausea. They carry very low risk. Supplements taken by mouth carry more real risk. They deserve more caution. Treat these two groups differently. Do not lump them all into one bucket in your mind.

Many complementary practices are not covered by insurance, and some can be expensive over time, especially ongoing supplements or regular sessions with a practitioner. Cost is a fair thing to weigh alongside evidence and safety. It is not a lesser concern just because it is practical rather than medical. Ask upfront what a practice costs, and how often you would need it, before committing to it long term.

Some people, even well-meaning friends or family, may push you toward alternative treatments in place of your standard care, especially during a hard stretch of treatment. It is okay to say no, even to someone who loves you and means well. You can also bring their suggestion to your oncologist directly. Your team can help you sort out what, if anything, might be worth trying alongside your treatment, and what should be avoided entirely.

Ask which practices might help your specific symptoms, based on real evidence. Ask about any supplement before you start it, not after. Ask whether your cancer center has a program that can guide you directly.

• Call 911 or go to an emergency department if your face, lips, or tongue swell, a rash spreads fast, or breathing gets hard after you take a supplement. That can be a severe allergic reaction.
• Call your care team the same day if your skin or eyes turn yellow, your urine goes dark, or you hurt under the right ribs. Some herbs harm the liver. Kava is one the FDA has warned about.
• Call your care team within a day or two if you have begun a supplement and not yet told them. St. John's wort, for one, can make some cancer drugs work less well.

• National Cancer Institute — Complementary and Alternative Medicine.
• MedlinePlus — Herbal remedies and supplements: using them safely. Accessed 2026-08-11.