I've used Web MD for several years now to begin researching medical issues, conditions, and treatments. Serious reactions to some prescriptions brought me there. It's difficult for a lay person to read peer reviewed medical articles without a strong background, so I begin with these folks. I check out the abstracts for some of the bibliographies for leads to more detailed information. Sometimes this highlights questions I've overlooked. Their herbal info is pretty good as are their write-ups on pharmaceuticals.