Complementary meds info online

Which websites list the scientific evidence for complementary medicines and their interactions with conventional medicines?

Prescribers looking for free, high-quality information about complementary medicines should visit the following websites.

Medline Plus ( lists some interactions under ‘side effects and cautions’ and can be used by health professionals and consumers (as these resources are US-based, there may be differences in substance names).

Natural Standard ( and the Natural Medicines Comprehensive Database (, both subscription based, provide comprehensive information and an interaction checker for complementary and conventional medicines. 

They were also judged to be the best sources of