TL;DR: Marijuana brownies are a high-priority emergency for dogs due to the dual toxicity of THC and ingredients like chocolate or xylitol. Seek immediate veterinary care to prevent severe symptoms like seizures, heart arrhythmias, or coma.
What happens if my dog eats a marijuana brownie?
When a dog consumes a marijuana brownie, they are facing a double threat: THC toxicity from the cannabis and potential poisoning from ingredients like chocolate, cocoa powder, or the sugar substitute xylitol. Dogs have significantly more cannabinoid receptors than humans, making them much more sensitive to the psychoactive and physical effects of THC.
Is it an emergency if my dog ate a marijuana brownie?
- Yes, this is considered a high-priority veterinary emergency requiring immediate intervention.
- Ingestion can lead to symptoms such as extreme lethargy, loss of coordination (ataxia), urinary incontinence, and a slowed heart rate.
- In severe cases, your dog may experience seizures or fall into a coma.
- Brownies often contain cocoa or dark chocolate, which significantly increases the risk of heart arrhythmias and central nervous system overstimulation.
How can taking a photo of the brownie packaging help my veterinarian?
- If you still have the packaging or a piece of the brownie, taking a clear photo can be life-saving.
- A photo of the ingredient list helps the veterinarian determine the concentration of THC (milligrams) and the type of chocolate used.
- Images help identify whether other dangerous additives like xylitol or nuts are present.
- This allows the medical team to calculate toxicity levels quickly and prepare the appropriate treatment before you even arrive at the clinic.
Clinical Context (Merck Veterinary Manual)
Following marijuana ingestion in dogs, clinical signs typically manifest within 30-90 minutes and can persist for up to 72 hours. Common clinical findings include depression, ataxia, bradycardia, hypothermia, vocalization, hypersalivation, vomiting, diarrhea, urinary incontinence, seizures, and coma. Diagnosis is based on a history of exposure and typical clinical signs; urine testing at human hospitals or using an over-the-counter marijuana drug test kit may help confirm the diagnosis early on. Treatment consists of supportive care, including inducing emesis and administering activated charcoal if the exposure is recent and no contraindications exist. Comatose animals should be monitored for aspiration pneumonia, given IV fluids, treated for hypothermia, and rotated frequently to prevent dependent edema or decubital ulceration. Diazepam can be administered for sedation or to control seizures. Treatment and monitoring should continue until all clinical signs have resolved.
Chapter: Toxicology, Emergency
Source: The Merck Veterinary Manual, 11th Edition (Page 3041)