Marijuana is becoming legalized in more states, and it should go without saying that THC-containing products should be stored where dogs can't access them. Still, dogs are curious companions that sniff around the most unexpected places, so accidents can happen.
If you ever discover that your dog ate marijuana, don't panic. This guide will help you both understand the short- and long-term effects of THC consumption on an animal and what to do for immediate treatment.
What Are the Side Effects if a Dog Eats Marijuana?
If a dog does ingest marijuana or THC-containing products, you're probably wondering what type of reaction you'll see. Will your pet act sleepy or overly excitable? Will they get sick or be completely unfazed?
"Dogs will act like they are drunk at first with marijuana and THC," said Sara Ochoa, DVM and veterinary consultant for Dog Lab, in an interview for this article.
Later, they may start vomiting or acting twitchy. Your pet might experience some gastrointestinal issues depending on the product and how much they ingested.

In addition to appearing drunk or twitchy, dogs that ingest marijuana or marijuana products may exhibit some serious side effects — once again, depending on what they ate and how much they consumed. These may include incoordination, drunk walking, tiredness, urinary incontinence (or inability to control urination), seizures, and other neurological symptoms, according to Ochoa. In very rare instances, eating too much marijuana can lead to a coma or be fatal for a dog.
The ASPCA lists marijuana as a plant that's toxic to dogs. They report that eating weed may cause your dog to experience:
- Prolonged depression
- Incoordination
- Hypersalivation — producing a high, abnormal amount of saliva
- Dilated pupils
- Low blood pressure
- Low body temperature