Astragalus is a plant that is indigenous to the elevated northern Chinese provinces of Yunnan and Sichuan. The root of the plant has been used for centuries in traditional Chinese medicine, often to enhance the body's immune system, according to the National Center for Complementary and Alternative Medicine. Other uses include treating hepatitis, cancer, upper respiratory infections and heart disease. It also has anti-inflammatory and antibacterial properties that can make it useful in treating wounds, according to the University of Maryland Medical Center. When used as directed, it is considered safe, but some people may experience side effects.
Gastrointestinal Distress
Some people taking supplements containing astragalus root may experience mild gastrointestinal distress. Possible effects include nausea, stomach upset and diarrhea, according to Drugs.com.
Bloating
A noticeable increase in bloating and gas, including belching and flatulence, are also possible side effects of astragalus root, according to Drugs.com.
Immune Suppression
Astragalus root can interfere with medications that suppress the immune system, according to the National Center for Complementary and Alternative Medicine. Corticosteroids, cyclophosphamide and other immune-suppressing medicines can be counteracted by the herb.
Allergic Reactions
As with all herbs, it is possible to develop an allergic reaction when taking astragalus. Some allergic reactions can be severe or even life-threatening. Signs of a severe allergic reaction include hives, swelling of the face or neck, chest tightness, difficulty breathing and wheezing, according to Drugs.com.
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