Health Square (healthsquare.com) - a good starting point for prescription drugs
MedicineNet (medicinenet.com) - provides easy to understand information on medications, diseases, conditions, and procedures; also features informative articles and a medical dictionary
RxList (rxlist.com) - Rx drug search; gives generic names
THOMAS Legislative Information on the Internet (thomas.loc.gov) - a site maintained by the Library of Congress that provides a wealth of information on current and historical issues before Congress