ClinicalTrials.gov - http://www.clinicaltrials.gov/

Healthfinder - http://www.healthfinder.gov/

Combined Health Information Database - http://chid.aerie.com/

MedicineNet - http://medicinenet.com/script/main/hp.asp

Senior Medi-Benefits - http://www.seniormedi-benefits.org/

HealthGate - http://www.healthgate.com/

Go Ask Alice - http://www.columbia.edu/cu/healthwise

Achoo - http://www.achoo.com/

The Virtual Hospital - http://www.vh.org/index.html

National Institute of Health (NIH) - http://health.nih.gov/

Mayo Clinic Health Oasis - http://www.mayohealth.org/

Online Medical Dictionary - http://medical-dictionary.com/

Food and Drug Administration - http://www.fda.gov/

Health on the Net - http://www.hon.ch/home.html