The one I usually use to find more info on meds I take.

http://www.drugs.com/

Patient assistance programs are run by pharmaceutical companies to provide free medications to people who cannot afford to buy their medicine.

http://www.rxassist.org/default.cfm

ClinicalTrials.gov is a registry and results database of federally and privately supported clinical trials conducted in the United States and around the world.

http://www.clinicaltrials.gov/