- U.S. Food and Drug Administration www.fda.gov
- American Society of Health-System Pharmacistswww.safemedication.com
- PDR.net – The Most Trusted Source for FDA-approved Drug Labeling for Physicians and Prescriberswww.pdr.net
- MedicineNet – Health and Medical Information Produced by Doctorswww.medicinenet.com
- RxList – The Internet Drug Index for prescription drugs, medications and pill identifierwww.rxlist.com
