Two great resources identify the side effects of and potential interactions with herbs and supplements. Natural Standard, a comprehensive, evidence-based database of information on complementary and alternative medicine and Meyler’s Side Effects of Herbal Medicines, a textbook, are available online.
Natural Standard was founded by healthcare providers and researchers to provide evidence-based information about complementary and alternative therapies. Grades are used to reflect the level of available scientific data for or against the use of each therapy for a specific medical condition. Users can search by treatment, condition, or herb/supplement. Natural Standard provides a Foods, Herbs and Supplements database that includes interactions. It also offers interactions and depletions checkers.
Meyler’s Herbal Medicines is a textbook to which Dana has online access. Meyler’s covers herbal medicines and offers both adverse effects and interactions information.