If your dog just ate an edible, call your veterinarian or an emergency animal poison hotline right away. The two main 24/7 lines are the Pet Poison Helpline at 855-764-7661 and the ASPCA Animal Poison Control Center at 888-426-4435. While THC rarely kills dogs, it can make them seriously ill, and edibles often contain other ingredients that are independently dangerous. Speed matters here.
What to Do Right Now
First, try to figure out what your dog ate and how much. Check the packaging for the THC content in milligrams, and note whether the product contains chocolate, xylitol (a sugar substitute), raisins, or macadamia nuts. All of these are toxic to dogs on their own. This information helps a vet or poison control adviser assess the severity and tell you what to do next.
Do not try to make your dog vomit unless a veterinarian specifically tells you to. Vomiting is only safe within roughly the first hour after ingestion, and only if the dog is still acting completely normal. THC’s sedating effects can kick in fast. Once a dog is drowsy, disoriented, or wobbly, inducing vomiting creates a serious risk of aspiration, where vomit enters the lungs and causes pneumonia. Aspiration pneumonia is one of the leading causes of death in cannabis toxicity cases in dogs.
If you’re worried about telling a vet the truth, don’t be. Veterinarians are not required to report marijuana-related pet cases to law enforcement, even in states where cannabis is illegal. Being honest about exactly what your dog ate gives them the best chance of helping quickly.
Symptoms You’ll See
THC affects dogs much more intensely than it affects humans. Dogs have a higher density of cannabinoid receptors in their brains, which means the same dose that gives a person a mild buzz can hit a dog hard. Symptoms typically appear within 30 minutes to a few hours after ingestion, though edibles can take longer because they need to be digested first.
The most common signs include:
- Loss of coordination: stumbling, swaying, or an inability to walk straight
- Extreme drowsiness: your dog may seem “out of it” or unable to stay awake
- Urinary incontinence: dribbling urine without seeming to notice
- Dilated pupils and glassy eyes
- Exaggerated startle responses: flinching at sounds or touch
- Changes in heart rate: either unusually slow or fast
In mild cases, this looks like a very sedated, wobbly dog that seems confused. In more serious cases, particularly when a small dog eats a high-dose edible, you may see vomiting, tremors, severe agitation, or a drop in body temperature. Seizures and coma are rare but have been documented, especially with large exposures or products containing concentrated THC extracts.
When It Becomes an Emergency
Most dogs recover from THC ingestion with supportive care. But certain situations are genuinely life-threatening and call for an immediate trip to an emergency vet, not a phone call.
Go to the ER if your dog is unresponsive or difficult to rouse, having seizures, showing signs of severe breathing difficulty, or has collapsed. A survey of North American veterinarians documented 16 deaths believed to be caused by cannabis toxicity in dogs. The reported causes included aspiration pneumonia, respiratory arrest, uncontrolled seizures, coma, and pancreatitis. These outcomes are uncommon, but they happen, particularly with high-potency products.
Synthetic cannabinoids (sometimes found in certain vape products or novelty edibles) are a separate and more dangerous category. They tend to cause more severe symptoms and carry a higher risk of death in dogs compared to standard THC edibles.
The Hidden Danger in the Ingredients
THC itself isn’t the only threat. Many edibles are made with ingredients that are independently toxic to dogs, and these secondary poisons can actually be more dangerous than the cannabis.
Chocolate is the most obvious one. The darker the chocolate, the more toxic it is to dogs. A pot brownie made with dark chocolate is a double emergency. Xylitol is the other major concern. This sugar substitute shows up in sugar-free gummies, baked goods, mints, and products marketed as low-calorie or diabetic-friendly. In dogs, xylitol triggers a massive insulin spike that can crash blood sugar levels within 10 to 60 minutes, leading to weakness, collapse, and seizures. Xylitol can also cause liver failure. If the edible packaging lists xylitol (sometimes labeled as “birch sugar”), that’s an emergency on its own, regardless of the THC.
Raisins, macadamia nuts, and high amounts of butter or oil in edibles can also cause problems ranging from kidney damage to pancreatitis. When you call your vet or poison control, reading off the full ingredient list is just as important as reporting the THC dose.
What Happens at the Vet
There’s no antidote for THC in dogs. Treatment is supportive, meaning the vet manages symptoms and keeps your dog safe while the drug works its way out of the system.
If your dog arrives at the clinic within the first hour and is still behaving normally, the vet may induce vomiting to get the edible out before it’s fully absorbed. They may also give activated charcoal, which binds to toxins in the gut and reduces how much gets into the bloodstream. Neither of these is safe once symptoms have started.
For dogs that are already showing signs of intoxication, the vet will focus on keeping them comfortable and stable. That typically means IV fluids, temperature regulation, and monitoring heart rate and breathing. Dogs with severe agitation or tremors may receive sedatives. In rare cases involving very large doses or concentrated products, vets can administer a fat-based IV solution that helps pull THC out of the bloodstream faster, since THC binds readily to fat.
Most dogs will need to be monitored for several hours. Mild cases may be sent home with instructions once the worst has passed. More serious cases might stay overnight.
How Long Recovery Takes
The effects of THC in dogs generally last longer than they do in humans. Most dogs start improving within 12 to 24 hours, but some remain wobbly or lethargic for up to 72 hours, especially if they ate a large dose or a high-fat edible (fat slows digestion and extends absorption time). Full recovery without lasting effects is the norm. Dogs that receive prompt veterinary care for serious symptoms overwhelmingly do fine.
During recovery at home, keep your dog in a quiet, dimly lit space where they won’t need to navigate stairs or jump on furniture. Offer small amounts of water once they’re alert enough to drink without choking. Don’t force food until they seem interested in it on their own.
Preventing It From Happening Again
Dogs don’t learn to avoid edibles. The butter, sugar, and chocolate in most cannabis products smell delicious to them, and dogs can sniff out edibles in bags, drawers, and backpacks that seem secure to you. Store all cannabis products in hard-sided, latch-closing containers on high shelves or inside locked cabinets. Treat them the way you’d treat medications: assume your dog is actively trying to get into them, because they probably are.
Purses, coat pockets, and nightstands are the most common places dogs find edibles. If you have guests who use cannabis, ask them to keep their products in a closed room your dog can’t access. A surprising number of veterinary cannabis cases come from dogs getting into a visitor’s stash rather than the owner’s.