Reviewed on 9/14/2021

What Is Astragalus and How Does It Work?

Astragalus suggested uses include treating upper respiratory infection, common cold, other infections, and hepatitis.

Other suggested uses for astragalus include treating breast, cervical, and lung cancers (in combo with glossy privet [Ligustrum lucidum]).

There is insufficient reliable evidence to rate astragalus use in breast cancer, lung cancer, hepatitis, and the common cold.

Astragalus is available under the following different brand names: Astragalus membranaceus.

Dosages of Astragalus

Suggested Dosing


  • 1-30 g/day orally
  • Doses greater than 28 g/day not recommended, no additional benefit and might cause immune suppression


  • 0.5-1 Liter per day (maximum of 120 grams of whole root per liter of water)

Dosage Considerations – Should be Given as Follows:

  • See "Suggested Dosing"


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What Are Side Effects Associated with Using Astragalus?

Astragalus has no known side effects at recommended doses.

Astragalus may stimulate the immune system so people with autoimmune disease should consult their doctor before use.

This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.

What Other Drugs Interact with Astragalus?

If your doctor has directed you to use this medication, your doctor or pharmacist may already be aware of any possible drug interactions and may be monitoring you for them. Do not start, stop, or change the dosage of any medicine before checking with your doctor, health care provider or pharmacist first.

  • Astragalus has no known severe or serious interactions with other drugs.
  • Astragalus has moderate interactions with at least 27 different drugs.
  • Mild interactions of astragalus include:

This information does not contain all possible interactions or adverse effects. Therefore, before using this product, tell your doctor or pharmacist of all the products you use. Keep a list of all your medications with you, and share this information with your doctor and pharmacist. Check with your health care professional or doctor for additional medical advice, or if you have health questions, concerns or for more information about this medicine.

What Are Warnings and Precautions for Astragalus?


This medication contains astragalus. Do not take Astragalus membranaceus if you are allergic to astragalus or any ingredients contained in this drug.

Keep out of reach of children. In case of overdose, get medical help or contact a Poison Control Center immediately.


  • Hypersenstivity

Effects of Drug Abuse

  • No information available

Short-Term Effects

  • See "What Are Side Effects Associated with Using Astragalus?"

Long-Term Effects

  • See "What Are Side Effects Associated with Using Astragalus?"


  • None

Pregnancy and Lactation

  • There is no information available about use of astragalus during pregnancy or while breastfeeding. Consult your doctor.


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