Guidance for Veterinarians on Public Use of Veterinary Ivermectin
September 7, 2021

Dear Veterinarian,
Health Canada is aware that members of the public have contacted veterinarians to purchase ivermectin labelled for veterinary use to treat or prevent COVID-19 in humans.
On August 31, Health Canada issued a public advisory to inform Canadians and health professionals of the risks associated with the unauthorized use of veterinary or human drug versions of ivermectin to prevent or treat COVID-19. The Canadian Veterinary Medical Association (CVMA) has shared this public advisory with you.
Currently, there is no evidence that human or veterinary ivermectin is safe or effective when used to prevent or treat COVID-19. Ivermectin labelled for human use is authorized for sale in Canada only for the treatment of parasitic worm infections. Veterinary ivermectin may be highly concentrated for use in large animals and can be dangerous for humans. It may cause serious health problems such as vomiting, diarrhea, low blood pressure, allergic reactions, dizziness, seizures, coma and even death.
We are asking for your help to share information about these potentially serious health risks and referring individuals to Health Canada’s advisory. Veterinarians should also encourage the public to contact their health care professional for advice on how to prevent and treat       COVID-19. 
Please do not hesitate to contact the Veterinary Drugs Directorate at if you have questions.

Marilena Bassi
Director General
Veterinary Drugs Directorate
Dr. Louis Kwantes
CVMA President
You are receiving this message as a member of the Canadian Veterinary Medical Association (CVMA). The CVMA is the national and international voice for Canada’s veterinarians, providing leadership and advocacy for veterinary medicine.