National Institutes of Health (USA)
Lots and lots of information on everything related to the practise and usage of medicine in the United States.

Some sites where you can search the largest medical research database Medline for free:

  • Medscape
  • Healthworks
  • WebMD
    One of the most visited medical websites on the Internet.
  • Mioti: medical information on the Internet
    Huge internet link site with links to all important medical and alternative medicince websites.
    Quality: Excellent place to start a search.
    Extensive website with links and information on eveything concerning health. Including biomedical and complementary medicine.
  • Nutrasanus
    Website with evidence based information on herbal and dietary supplements. Especially for consumers of these products.