- U.S. Food and Drug Administrationwww.fda.gov
- American Society of Health-System Pharmacistswww.safemedication.com
- Institute for Safe Medication Practiceswww.ismp.org
- Consumer Healthcare Products Associationwww.chpa.org
- RxListwww.rxlist.com
- MedicineNet – Health and Medical Information Produced by Doctorswww.medicinenet.com
