Dog Seizures and Poisoning: Toxins That Cause Them
What to do during a seizure, when it's an emergency, and the poisons (xylitol, slug bait, stimulants, salt) that cause them.
A seizing dog is terrifying, and toxins are one of the major causes of a first-ever seizure, especially in a young, previously healthy dog. This page covers the during-seizure basics and the poisons most likely to be behind it.
During the seizure: 90 seconds of rules
- Don't touch the mouth. Dogs can't swallow their tongues; you can get badly bitten.
- Clear the area: move furniture, block stairs, dim lights and noise.
- Time it. Under 2 minutes is typical; over 5 minutes, or seizures repeating back-to-back, is an emergency in itself.
- Afterward, expect disorientation (minutes to hours). Keep things calm and don't offer food or water until fully alert.
Any first seizure = vet, same day
The toxins that cause dog seizures
Xylitol crashes blood sugar into seizure range within an hour. Snail bait (metaldehyde) and compost/mold mycotoxins cause tremors that escalate into seizures. Stimulants, ADHD medications, caffeine, chocolate at high doses, overdrive the nervous system. Salt poisoning (play dough, seawater, ice melt) swells the brain. Antidepressant overdoses cause serotonin-syndrome seizures.
What helps the vet most
The timeline (when it started, how long, how many), a video if a seizure repeats and you can safely film, and an honest inventory of what your dog could have reached in the last 24 hours: medications, trash, garden products, anything sugar-free. Toxin seizures are treated very differently from epilepsy, and the history is what separates them.
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