Cannabis Edibles poisoning in dogs and cats
Toxic agent: THC, usually alongside chocolate, xylitol or butter · Reviewed 2026-08-18
Phone a vet now, before reading on. Have ready: your pet's weight, roughly how much was eaten and when, and the packaging if there is any. ASPCA Animal Poison Control (+1 888 426 4435), Pet Poison Helpline, or Animal PoisonLine in the UK.
An edible is rarely one poisoning. THC is the reason the dog is wobbling, but the brownie it came in may be the reason it needs treatment — and the vet needs to know about both.
What it actually does
THC is highly fat-soluble, crosses the blood-brain barrier easily and acts on CB1 receptors, producing profound sedation and loss of coordination. Dogs have a higher density of these receptors in the cerebellum than humans, which is why they get so much more ataxic. Edibles are dosed for humans by weight, and the carrier — chocolate, butter, sweetener — carries its own risk.
How much matters
The combination is what determines the treatment:
| THC alone | very sedating, rarely fatal; oral lethal doses in dogs are extremely high |
|---|---|
| In chocolate | add methylxanthine toxicity — often the more urgent problem |
| In a sugar-free gummy | add xylitol, which can be the actual emergency |
| In cannabutter or a fatty bake | add pancreatitis risk |
| Concentrates, wax and oil | far higher THC per gram than flower or a baked good |
Say what it was. Legal status varies and vets are treating the animal, not reporting the household — but treatment genuinely differs depending on whether xylitol or chocolate came with it.
What you will see, and when
Onset: 30 minutes to 3 hours by mouth. Typical course: 12 to 36 hours, occasionally longer with concentrates.
- 30 min – 3 hoursWobbling, glazed eyes, dilated pupils, jumpiness at sounds, dribbling urine
- 3–12 hoursDeep sedation, low heart rate, low body temperature, vomiting
- 12–36 hoursSlow recovery; tremors or seizures in severe cases or with concentrates
What the vet will do
Mostly supportive: fluids, warmth, anti-nausea medication, and quiet monitoring. Inducing vomiting is often unsafe once the animal is sedated. Intravenous lipid emulsion is used for large or concentrate ingestions because THC partitions into fat. Any co-ingested chocolate or xylitol is treated on its own terms.
Outlook
Very good for THC alone. Determined by the carrier when there is one.
Dogs and cats are not the same here
Both, and dogs far more often. Cats are more likely exposed to smoke or oil than to edibles.
Where it comes from in a normal house
- Gummies, brownies, cookies and chocolate bars
- Cannabutter and infused oils in the fridge
- Vape cartridges and concentrates
- Discarded joints and roaches on walks
- Human medical cannabis and CBD products containing THC
The thing people get wrong
“It is natural and it will just sleep it off, so there is no point going in.”
The THC usually will pass. The chocolate or the xylitol in the same brownie may not, and a deeply sedated animal is at risk of inhaling its own vomit. The visit is about the carrier and the airway.
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Get PawLife on the App StoreFrequently asked questions
How much Cannabis Edibles is dangerous?
Say what it was. Legal status varies and vets are treating the animal, not reporting the household — but treatment genuinely differs depending on whether xylitol or chocolate came with it.
How long after exposure to Cannabis Edibles do symptoms start?
30 minutes to 3 hours by mouth. Wobbling, glazed eyes, dilated pupils, jumpiness at sounds, dribbling urine. 12 to 36 hours, occasionally longer with concentrates.
Is Cannabis Edibles worse for cats or dogs?
Both, and dogs far more often. Cats are more likely exposed to smoke or oil than to edibles.
Is it true that: It is natural and it will just sleep it off, so there is no point going in.
The THC usually will pass. The chocolate or the xylitol in the same brownie may not, and a deeply sedated animal is at risk of inhaling its own vomit. The visit is about the carrier and the airway.
Related emergencies
Sources
This page is information, not veterinary advice. Toxic doses vary with body weight, age, breed and individual sensitivity, and the figures above exist to explain what a vet is assessing, never to decide that an amount is safe. If you are reading this because something has already been eaten, call a vet.