Is Marijuana (Cannabis) Toxic to Dogs?
Marijuana is toxic to dogs, and pets are far more sensitive to THC than humans. Ingestion of cannabis edibles, buds, or butter can cause incoordination, lethargy, urine dribbling, and in severe cases, seizures and coma. Marijuana brownies pose a double threat: THC toxicity PLUS chocolate toxicity. If you suspect your dogs has ingested marijuana (cannabis), contact your veterinarian or nearest emergency vet clinic immediately.
✓ You're doing the right thing by checking — Marijuana (Cannabis) is toxic to dogs, and acting quickly can make a real difference. You did the right thing by looking this up.
If Your Pet May Have Ingested Something Toxic
Contact your veterinarian or nearest emergency vet clinic immediately. Do not wait for symptoms to appear — early intervention significantly improves outcomes.
| Toxic? | Severity | Time to Onset | Commonness | Urgency |
|---|---|---|---|---|
| Yes | Moderate | 30–60 minutes (edibles may be longer) | Increasing | Urgent |
The Toxic Principle
The dangerous compound in Marijuana (Cannabis) is THC (tetrahydrocannabinol).
THC affects cannabinoid receptors (CB1 and CB2) in the central nervous system. Dogs have more cannabinoid receptors than humans, making them more sensitive to THC's effects. The toxic oral dose in dogs is approximately 3 g per pound of dried marijuana, but edibles (which contain concentrated THC in butter or oil) are far more dangerous per gram. THC is fat-soluble, so butter- and oil-based edibles produce much higher blood levels. The LD50 in dogs is approximately 3 g/kg of THC — very high — but clinical toxicity occurs at much lower doses.
How Much Is Dangerous?
The risk depends on your dogs's weight and the amount ingested.
| Pet Weight | Dangerous Amount | Expected Severity |
|---|---|---|
| Small dog (under 10 lbs / 4.5 kg) | A small amount of edibles or a few puffs of secondhand smoke | Moderate |
| Medium dog (25–50 lbs / 11–23 kg) | A cannabis edible or small amount of dried buds | Moderate |
| Large dog (50–90 lbs / 23–41 kg) | Multiple edibles or larger amounts of plant material | Mild |
| Any size dog (marijuana brownies) | Double threat: THC + chocolate toxicity | Severe |
Symptoms to Watch For
Symptoms of marijuana (cannabis) poisoning in dogss typically progress through these stages:
Onset
30–90 minutes- Lethargy or depression
- Drooling
- Wobbling / incoordination
- Dilated pupils
- Sensitivity to sound/touch
Peak
2–6 hours- Urine dribbling
- Static ataxia (standing rigidly, swaying)
- Hypothermia or hyperthermia
- Bradycardia (slow heart rate)
- Vomiting
Severe
6–24 hours- Seizures (rare)
- Coma (rare)
- Death (very rare, usually from edibles with chocolate)
You just learned the symptoms. Now be ready for them.
The #1 regret pet owners have after an emergency? "I wish I'd been prepared."
You care enough to research this — that puts you ahead of most pet owners. But research without preparation is just worry. This guide covers exactly what to do in the first 15 minutes after poisoning — the window that determines whether your dogs lives or dies.
Get the First Aid Guide — Protect Your Dogs →
Be Ready If This Happens to Your Dogs
You just read what marijuana (cannabis) does to dogss. The symptoms. The suffering. The $200–$3,000 vet bill. The question is: are you prepared if it happens again?
Get the Emergency Kit — Be Ready →What to Do Right Now
- 1 Call your veterinarian or your vet immediately — be honest about what was consumed.
- 2 If marijuana brownies were eaten, treat this as a chocolate emergency too.
- 3 If ingestion was within 1 hour, call your vet immediately — early decontamination can be life-saving.
- 4 Keep your dog in a safe, quiet, warm environment — minimize stimulation.
- 5 Do NOT try to 'wait it out' — veterinary monitoring is recommended.
- 6 Vets are not law enforcement — they will not report you. Your dog's health comes first.
Treatment and Recovery
For recent ingestion, induce vomiting and administer activated charcoal. Supportive care includes IV fluids, thermoregulation, and anti-nausea medications. Most dogs recover within 24–72 hours with supportive care. Severe cases (typically from concentrated edibles) may require sedation, seizure control, and extended monitoring. Be honest with your vet about what was consumed — they need to know to provide the right treatment. Veterinarians are not required to report marijuana exposure.
Estimated Cost
$200 – $3,000
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Why Marijuana (Cannabis) Is Dangerous for Dogs
Dogs are vulnerable to marijuana (cannabis) because they metabolize THC (tetrahydrocannabinol) differently than humans. While dogs are generally more resilient than cats, the compound can still cause significant health issues depending on the dose consumed.
THC affects cannabinoid receptors (CB1 and CB2) in the central nervous system. Dogs have more cannabinoid receptors than humans, making them more sensitive to THC's effects. The toxic oral dose in dogs is approximately 3 g per pound of dried marijuana, but edibles (which contain concentrated THC in butter or oil) are far more dangerous per gram. THC is fat-soluble, so butter- and oil-based edibles produce much higher blood levels. The LD50 in dogs is approximately 3 g/kg of THC — very high — but clinical toxicity occurs at much lower doses.
Other Substances to Watch For
If your dogs got into marijuana (cannabis), be aware of these related hazards that often appear in the same contexts:
Expected Veterinary Costs
Based on typical veterinary treatment for marijuana (cannabis) toxicity in dogs, including:
- •Veterinary examination
- •Decontamination and supportive care
- •Monitoring and follow-up
Actual costs vary by location, clinic, and severity of the case. Emergency clinics typically charge more than daytime veterinary offices.
Frequently Asked Questions
Can marijuana kill a dog?
Death from marijuana alone is extremely rare in dogs. However, marijuana edibles that also contain chocolate, raisins, or xylitol pose a much more serious and potentially fatal risk. The combination of THC toxicity plus chocolate/xylitol toxicity is what makes edibles dangerous.
Will my vet report me if my dog ate marijuana?
No. Veterinarians are focused on treating your pet, not law enforcement. They will not report you to police or animal control for marijuana exposure. Being honest about what your dog consumed is essential for proper treatment.
People Also Ask
One more thing to check
Many dogs owners who worry about marijuana (cannabis) also need to know about Is Chocolate Toxic to Dogs?. If your dogs had access to marijuana (cannabis), they may have been exposed to other hazards too.
Related Dangers
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Sources & Citations
Toxicity data is based on published veterinary toxicology references. In an emergency, contact your veterinarian or nearest emergency vet clinic immediately.
📚 Sources & Methodology
Toxicity data compiled from the following veterinary toxicology databases:
- • ASPCA Animal Poison Control Center — case data and species-specific toxicity ratings
- • Pet Poison Helpline — dosage threshold data and symptom timelines
- • Merck Veterinary Manual — clinical treatment protocols
Weight-based severity thresholds are calculated using established veterinary toxicology formulas. All "toxic" and "non-toxic" classifications are based on peer-reviewed veterinary literature. Last reviewed: May 2026.
Medical Disclaimer: The information on this page is for educational purposes only and is not a substitute for professional veterinary advice. If you suspect your pet has been poisoned, contact your veterinarian or nearest emergency vet clinic immediately. This page was last reviewed on 2026-04-24.
Sable T. Thornwood
Pet Toxicity Researcher
Sable T. Thornwood has spent over a decade researching pet toxicity and companion animal safety, with a focus on common household substances, plants, and foods. Her research draws on veterinary toxicology databases, ASPCA case records, and peer-reviewed clinical literature to help pet owners make informed, timely decisions during potential poisoning events.
About Sable & PetToxCheck