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Medication and Supplement Review: Why to Bring Every Bottle

Why to bring every medicine, vitamin and herbal product to a naturopathic or integrative visit, how to make the list, and what to ask a pharmacist or prescriber before you start anything new.

Content last updated . This page has not been medically reviewed.

This is general information, not medical advice. It gives no dosing and never tells you to stop a medicine. If you think you are having a severe allergic reaction, call 911; if you think someone has swallowed something harmful, call Poison Help at 1-800-222-1222.

Why the review matters

Natural does not mean risk-free. NCCIH says "natural" does not always mean "safe," and that dietary supplements may interact with your medicines or pose risks if you have certain medical problems or are going to have surgery. [1] Practitioners can only check for problems they know about, so a complete list is the most useful thing you can bring.

Make the list

MedlinePlus suggests listing prescription medicines, over-the-counter medicines, vitamins, herbs and supplements, with the name, what each does, the dose, the times you take it and any side effects. [2] It also suggests taking the list and your medicines in their bottles to appointments and to the pharmacy. [2] A photo of each label works if bottles are too many to carry. Include teas, powders, drops and anything bought online or given by a friend.

Products may not match the label

NCCIH says what is on the label may not be what is in the product, and that the FDA has found prescription drugs, including anticoagulants such as warfarin, in products sold as dietary supplements. [1] It also says the FDA is not authorized to review dietary supplements for safety and effectiveness before they are marketed. [1] For that reason, tell your clinicians the exact product, not only the ingredient.

Questions to ask at the visit

  • Which of my current medicines could this product affect, and how will that be checked?
  • What are the possible side effects, and what should I do if I notice one? NCCIH advises that if you have side effects you stop taking the supplement and contact your health care provider. [1]
  • Does the practice sell what it recommends, and who benefits from the sale?
  • Will you share your plan with my doctor and pharmacist?

Ask a pharmacist too. The NHS advises always checking first with a pharmacist before taking a herbal medicine if you already take other medicine, including medicine bought without a prescription. [3]

If you are told to change a medicine

Do not stop or change a prescribed medicine, such as for diabetes, thyroid, blood pressure, blood thinning, mental health or transplant care, because of a practitioner's advice alone. The NHS says not to stop any prescribed medicine without first talking to your doctor. [3] MedlinePlus likewise says not to cut back or stop medicines on your own. [2] Talk to the prescriber first, and say who recommended the change.

Before surgery

NCCIH advises talking to your health care providers as far in advance of an operation as possible and telling them about all supplements you take. [1] See supplements before surgery.

Keep your records current

Update your list whenever anything changes, and give it to every clinician you see. NCCIH advises telling all your providers about every approach you use. [5] See talking with a health professional.

Frequently asked questions

Do I need to mention vitamins and herbal teas?

Yes. MedlinePlus suggests listing vitamins, herbs and supplements along with medicines. [2]

Can a supplement affect my blood thinner?

Some can. NCCIH says certain supplements may increase bleeding risk, and the NHS lists blood thinners such as warfarin among medicines that may not mix with herbal medicines. [1] [3] Ask your prescriber or pharmacist.

Who checks interactions?

A pharmacist or your prescriber. The NHS advises checking with a pharmacist first. [3]

Are supplements checked for safety before sale?

NCCIH says the FDA is not authorized to review dietary supplements for safety and effectiveness before they are marketed. [1] This is about the US.

Can I stop a medicine if the practitioner suggests it?

Not on that advice alone. Talk to your doctor first. [3]

More details: evidence, limits and cautions

The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.

What interactions can look like
  • NCCIH gives St. John's wort as an example of an herbal supplement that makes many medicines less effective. [1]
  • The NHS lists medicine groups that do not mix well with herbal medicines: statins, antidepressants, diabetes medicines such as metformin, blood pressure medicines, blood thinners such as warfarin, and hormonal contraception. It says taking an herbal medicine as well may cause harmful effects or stop your medicine working. [3]
  • NCCIH says some supplements may increase the risk of bleeding or affect your response to anesthesia. [1]

These are examples, not a full list. For detail see how interactions work, interactions by drug class and interactions with medicines and surgery.

Who should check with a clinician first
Pregnancy, breastfeeding, children, older adults, cancer treatment, kidney or liver disease, several medicines at once, and a history of an eating disorder all call for a clinician's input before a new supplement. The NHS says herbal medicines are not recommended for children and should not be used in pregnancy, breastfeeding, or with kidney or liver problems. [3] If you have cancer, NCCIH says to consult your health care providers before using any complementary approach. [4]
References
  1. Using Dietary Supplements Wisely, NCCIH. Read 2026-10-22.
  2. Keeping your medicines organized, MedlinePlus, US National Library of Medicine. Read 2026-10-22.
  3. Herbal medicines and complementary therapies, NHS (UK; page last reviewed 1 May 2026). Read 2026-10-22.
  4. Cancer and Complementary Health Approaches: What You Need To Know, NCCIH. Read 2026-10-22.
  5. 6 Things To Know When Selecting a Complementary Health Practitioner, NCCIH. Read 2026-10-22.
Education, not medical advice. This page is for general information. It does not diagnose or treat any condition and is not a substitute for care from a qualified health professional. Natural does not automatically mean safe. Ask a clinician or pharmacist before changing your care, especially if you take medication, are pregnant or breastfeeding, or have a health condition.