- U.S. Food and Drug Administration www.fda.gov
- American Society of Health-System Pharmacists www.ashp.org
- Institute for Safe Medication Practices www.ismp.org
- PDR.net – The Most Trusted Source for FDA-approved Drug Labeling for Physicians and Prescribers www.pdr.net
- MedicineNet – Health and Medical Information Produced by Doctors www.medicinenet.com
- Canada’s Food and Drugs Act and Regulations – Health Canada www.hc-sc.gc.ca
