Medicinal Cannabis and Pet Safety

Cannabis is the genus of a plant originating from Central Asia.  There are several species of cannabis plants including Cannabis sativa and Cannabis Indica.  The plant is also known as hemp.  Although, this term is often used to refer only to the plants cultivated for non-drug use.  There are two main products or cannabinoids derived from the plants, T.H.C. and C.B.D.  T.H.C. has significant psychotropic effects, while C.B.D. is believed to possess anti-inflammatory effects and pain control properties.

Dogs have the highest concentration of T.H.C. receptors of all mammals making them the most sensitive to the effects of T.H.C.  Even the smallest amount of T.H.C. will lead to a condition where the animal is swaying from side to side, drooling, urinating on itself,  acting disorientated, and can be fatal in rare circumstances.

At this time, there are no scientific studies that have looked at the effects of C.B.D., but it has been reported to help with arthritic pain and anxiety issues.  Even though recreational marijuana use is now legal in Ontario, it is illegal for all veterinarians to prescribe to their patients.  Medical marijuana laws do not apply to veterinarians, only human physicians.  Any discussion or recommendation made by a veterinarian could result in disciplinary action.  Scientifically based studies and trials are now underway and hopefully will lead to the legalization of marijuana and the development of new products that improve the quality of life for our furry friends.

Written by: Dr. Bernard Caplan, Veterinarian



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Our veterinarians are currently seeing all patients by appointment ONLY.  We continue to operate with a "closed waiting room" in order to keep our clients and staff safe during the pandemic. We appreciate your patience and understanding as these appointments take a little longer than normal.  

How do appointments work?
Please come to the back door for your appointment and call 416-537-3128 upon arrival. A veterinarian will speak with you over the phone and a veterinary assistant will come out to collect your pet for an examination. After examining your pet, the doctor will follow-up on the phone with their findings and recommendations. Thank you for entrusting us with the care of your pets. Please let us know in advance if they have any special needs.
Payment Methods:
We are currently accepting all payment methods. However, credit or debit cards are preferred.
How to collect food and prescription orders:
We appreciate advance notice for food and prescription refills. Please call 416-537-3128 upon arrival at the FRONT DOOR and a receptionist will be out with your order as soon as possible. For faster service, we suggest ordering pet supplies and food through our online store.  Delivery is free with purchases over $100.00.  It's easy!  Just click ONLINE STORE on our website to sign up.


Thank you for your patience and understanding and we look forward to seeing you and your furry family members again!

- The team at Annex Animal Hospital