Take-home message:
- THC is very dangerous to most companion animals
- Medical cannabis has only a few uses in humans, and even fewer in animals
- Cannabis, hemp or CBD treats, food or supplements are not approved or regulated by Health Canada. They are illegal and could be quite dangerous for your pets.
While medical marijuana has been available to varying degrees for decades, with recreational marijuana legalized this week in Canada, discussions about what (if anything) cannabis can treat seem to be at an all-time high (see what I did there?)
Discussions of treating medical problems with cannabis are not limited to humans. If cannabis may benefit humans, it may similarity benefit companion animals like dogs or cats. Considering that some of the major ailments cannabis is touted to treat are prime concerns for pet owners (anxiety, arthritis, pain) it makes sense for pet owners to be curious about cannabis.
Cannabis can be very dangerous for pets
When discussing cannabis and companion animals, it鈥檚 important to define a few terms.
听or THC is the main psychoactive component of cannabis. As most pet owners aren鈥檛 interested in getting their furry friends high, the vast majority of pet-marketed cannabis products are free, or almost free, from THC. Which is good, because THC is quite dangerous for animals.
Since it鈥檚 difficult to study cannabis (due to it鈥檚 soon-to-expire illegal nature) we lack recent numbers on the dose based effects of THC in dogs. Early studies report intoxication effects in听听with doses between0.25 and 0.5 mg/kg of body weight. If your average German Shepard is about 30 kg, they would show THC鈥檚 effects after ingesting 7.5 - 15 mg, or about a听.
Though cannabis intoxication and adverse effects have been reported in other animals like听,听听and听, it鈥檚 much more common in dogs. Why? Because dogs like to eat. As听, the President of the Canadian Association of Veterinary Cannabinoid Medicine explained to me, 鈥渆dibles, in particular, are very attractive to dogs, and if left within reach of pets, will often be gobbled up quickly.鈥�
听in States where legalization has occurred. We can expect much the same trend here in Canada. It really can鈥檛 be said enough that vigilance is crucial in keeping your pets safe.
While it鈥檚听听that pets will die from cannabis exposure (through smoke or edibles) there can still be serious effects, especially if left untreated. Fluffy and Rover probably won鈥檛 get a kick out of the intoxicating effects of cannabis, given that they can鈥檛 understand what鈥檚 happening. Pets may experience significant anxiety, agitation or lethargy. Smoke of any kind can cause respiratory distress and potentially听听to pets who inhale it regularly, due to the听polyaromatic hydrocarbons听created during incomplete combustion. Cats in particular are听听when exposed to secondhand cigarette smoke, a risk that may transfer to other types of smoke. .
听
So what鈥檚 with all the cannabis products for pets then?
Pet treats, foods and supplements in general feature no THC. They instead contain a different cannabinoid found in cannabis: cannabidiol or CBD. CBD is not toxic to animals like THC, and it does not cause the same psychoactive effects.
听for pets are听听for their听,听,听,听and anti-nausea effects. But do they work?
We basically don鈥檛 know.
of 16听showed a significant decrease in pain after treatment with CBD oil, but similar studies, or studies looking at cannabis to treat other conditions are seriously lacking.
Dr Silcox mentioned many anecdotes of positive effects of CBD products on pets, and this survey have found that听听polled听who have used cannabis products on their pets felt it helped. But anecdotes are never evidence enough. We need good, large, controlled studies to properly evaluate the potential benefits and risks of cannabis products on cats, dogs and other pets.
We can be听that cannabis could eventually be used in veterinary medicine to treat听for which it鈥檚 showing promise in human trials. The problem is,听
There鈥檚 good evidence that听听(), as well as help听听(which bears some similarities to the canine disease听)
For pain treatment however, the evidence for cannabis hasn鈥檛 looked wonderful.听found evidence for use of low dose cannabis for neuropathic pain, but not for other pain.听states that the use of cannabis for 鈥渃hronic neuropathic pain might be outweighed by their potential harms.鈥�
The outlook for cannabis in treating听like anxiety, non-chemotherapy induced nausea or glaucoma is听: 鈥淔or most conditions (example anxiety), cannabinoid evidence is sparse (at best), low quality and non-convincing.鈥� Despite claims to the otherwise, there听either.
I have three main concerns with regards to cannabis and animals. First, with legalization, there will be more cannabis in homes, which means more cannabis in a position to be eaten by pets.听. There鈥檚 no reason to expect a different trend in Canada, something that worries me.
Second, as Dr Silcox wrote, there is a 鈥渃oncern that that pet owners will attempt to medicate their pets with cannabis products and without appropriate guidance, put their pets at risk of adverse effects.鈥� When we give our pets, children or ourselves any medication we first check dosage information, but the problem is that it isn鈥檛 available in any well researched, accurate or well-defined way for most species.
Third, pet owners may use cannabis in lieu of other evidence-based treatments, putting their pets at risk or hurting their quality of life. We don鈥檛 really know what cannabis can or should be used for in animals, but that hasn鈥檛 stopped many owners from using it for things like pain, anxiety management and diabetes management. My fear, simply put, is that owners will choose cannabis over NSAIDS, over other pain killers, over insulin, and even over euthanasia. I hope that no animals are suffering as a result of receiving cannabis as an alternative treatment to conventional veterinary medicine, but my fear is that it鈥檚 already happening and will begin to happen more with legalization.
Whether they work or not, they鈥檙e illegal and unregulated.
Until October 17th, 2018 all products containing plant-derived cannabinoids (which includes THC and CBD) fall under the Controlled Drugs and Substances Act. But even after the 17th, it isn鈥檛 open season for cannabis products. The new Cannabis Act will regulate the approval and sales of cannabis products, meaning that anything sold legally will need to be approved by Health Canada.
Health Canada currently has听. So CBD and cannabis products currently have, as Dr Silcox explains, 鈥渘o regulatory oversight to ensure their quality, safety, or effectiveness. While they are marketed to treat a range of ailments, these health claims are unsubstantiated by Health Canada, the products are not approved, and as such, are not compliant with Canadian law.鈥�
Now, that could soon change. With legalization around the corner, studies on cannabis and its effects are about to become a lot more feasible. With more evidence we will be able to hash out which CBD claims have merit, and which are baseless.
With听听on veterinary use of cannabis we can hopefully expect some answers soon. In the meantime, a few things remain really important.
- Knowing tin your pets.
- Being open and honest with your veterinarians in regard to your pets cannabis exposure, and your use of CBD supplements with them.
- Storing all cannabis (in smokable or edible forms) in non-pet accessible places
- Eliminating your pet鈥檚 exposure to secondhand smoke
You might enjoy the feeling of being high, but Spot will not. Keep the joint to yourself and feed him a dog biscuit instead.
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