Intended uses: To treat colds, respiratory tract infections, and hay-fever symptoms.
What the science says: No reliable scientific evidence supports the use of goldenseal for any reason.
Special precautions: Long-term safety of goldenseal is not established. Can raise blood sugar.
Common side effects: Stomach upset.
Possible interactions: Heart drugs, cyclosporine, narcotic painkillers, Viagra, Allegra, antidepressants, antipsychotics.