The U.S. Food and Drug Administration (FDA) handles consumer complaints about medications, dietary supplements, and medical products. If you or someone in your family had an adverse reaction to a medical product: Call 911 for all medical emergencies Report an adverse reaction to a medication or other medical product: Fill out the FDA's MedWatch online reporting form. Call MedWatch at 1-800-FDA-1088 (1-800-332-1088). Download, print, and mail or take the voluntary reporting form to your doctor.  Pet Medication Problems Some dogs or cats may have adverse reactions to medication or medical devices. Know your options:  If your pet is in immediate danger, call your veterinarian. You can call and leave a message with the FDA’s Center for Veterinary Medicine at 1-888-FDA-VETS or 1-888-332-8387. For a faster response send an email to FDA's Center for Veterinary Medicine at AskCVM@fda.hhs.gov. File a Complaint About an Online Pharmacy If you suspect an online pharmacy is fake, report it to the U.S. Food and Drug Administration (FDA) and the Drug Enforcement Administration (DEA). Dietary Supplements The FDA regulates dietary supplements such as vitamins and herbs as well as food products. Learn about dietary supplements. Contact your local FDA Consumer Complaint Coordinator to file a complaint about dietary supplements.