Can Astragalus Membranaceus be taken with other medications?

by Roundrou RAHARIJAONA August 13, 2025

Astragalus and medicines: possible interactions and precautions

Astragalus (Astragalus membranaceus, huang qi in Chinese) is a root that has been used for centuries in Asian tradition and is now sold as a food supplement, most often in capsules. If you are on medication, one question soon comes up: can you take it at the same time as your medicines? Here are the families of medicines that call for caution, and what to do before you start.

Our product: Astragalus – Astragalus membranaceus – 100 capsules of 500 mg, 100% pure powdered root, no excipient (box of 100 capsules or set of 3 boxes).

The golden rule: talk to your doctor or pharmacist

A food supplement is not a medicine, but that does not make a plant neutral. Before adding astragalus to a prescription treatment, show the box to your doctor or pharmacist: they know your treatment and can judge whether the two can be combined. Never stop or change a treatment on your own.

Medicines that call for caution

Data in humans are limited. The interactions below are mentioned in the literature on the basis of traditional uses and laboratory studies: they are neither proven nor ruled out. That is precisely why the advice of a healthcare professional matters.

Immunosuppressants

These are the medicines prescribed after a transplant or for certain autoimmune diseases (for example ciclosporin, tacrolimus, azathioprine). Astragalus is traditionally associated with the body's defences: an effect opposite to the one these treatments aim for cannot be ruled out. As a precaution, it is not recommended with these medicines, unless the prescribing doctor explicitly agrees.

Anticoagulants and antiplatelet agents

For example warfarin, aspirin prescribed for the heart, clopidogrel. A few laboratory studies mention a possible influence of astragalus on blood clotting. If you take one of these medicines, or before surgery, ask your doctor for advice.

Diabetes treatments

For example metformin, insulin, sulfonylureas. An interaction with these treatments has been mentioned and cannot be ruled out. Do not take astragalus without talking to your doctor, and never change your doses on your own.

Other long-term treatments

Blood pressure treatments, diuretics, lithium, or any treatment taken over a long period: the same rule applies. If in doubt, ask before you start.

Who should avoid astragalus?

pregnant or breastfeeding women;
people with an autoimmune disease;
transplant recipients or people taking immunosuppressants;
children, unless advised by a doctor.

Possible side effects

Astragalus is generally well tolerated at usual doses. Digestive discomfort (nausea, bloating, diarrhoea) has been reported, and more rarely allergic reactions. In case of itching, rash, swelling or breathing difficulty, stop taking it and see a doctor without delay.

How to take astragalus capsules

1 capsule of 500 mg per day, preferably in the morning;
with a large glass of water, at breakfast;
as a 2 to 3 month course, followed by a break;
a box of 100 capsules lasts 100 days, the set of 3 boxes 300 days.

Do not exceed the recommended daily dose. A food supplement is not a substitute for a varied and balanced diet or a healthy lifestyle.

Capsules or decoction?

In Asia, the root is mostly prepared as a decoction. A capsule provides the same amount of root every day (500 mg), with no preparation and no taste. It also makes it easier to talk to your doctor: you know exactly what you are taking and how much.

Frequently asked questions

Can astragalus be combined with other plants?

Each plant has its own precautions: read them on each product page, and ask for advice if you are on medication. For ginkgo, see our article ginkgo biloba: dosage and safety.

Should you take a break?

Yes. The recommended course lasts 2 to 3 months, followed by a break.

Does astragalus replace a treatment?

No. It is a food supplement: it does not prevent, treat or cure any disease and never replaces a prescribed treatment.

Where can I buy astragalus capsules?

On our Astragalus – 100 capsules of 500 mg product page: box of 100 capsules or set of 3 boxes.