special subjects
Astragalus
Drug Interactions
Astragalus may interact with medications that suppress the immune system. Astragalus may increase immune system activity and thereby may decrease the effectiveness of medications that suppress the immune system, such as those used after organ transplant or to treat cancer. Astragalus may decrease excretion oflithium, which may result in increasedlithiumblood levels and thus possible serious adverse effects. (See also table.) 