Why Potato Plants and Green Potatoes Are Dangerous
Potato plants (Solanum tuberosum) and green or sprouted potatoes contain solanine glycoalkaloids, which act as natural pesticides and are toxic to dogs and cats when ingested.
Symptoms typically appear within a few hours and include vomiting, diarrhea, abdominal pain, dilated pupils, lethargy, weakness, and in severe cases, tremors or cardiac arrhythmias.
Even small amounts of green potato skin, sprouts, or foliage can trigger clinical signs, especially in smaller pets.
This toxin is well-documented by veterinary poison control centers and the ASPCA Animal Poison Control Center.
Prompt veterinary evaluation is critical because solanine poisoning can progress to neurological compromise and dehydration if untreated.
Why speed matters
Delaying care significantly worsens outcomes. Some signs appear hours or days later, so "looks fine right now" is not a reason to wait.
Signs to watch for
- Vomiting and diarrhea (may contain blood)
- Abdominal pain and restlessness
- Dilated pupils and sensitivity to light
- Lethargy, weakness, or collapse
- Tremors, ataxia, or seizures in severe cases
- Irregular heart rate or breathing difficulty
What to do right now
- Call your veterinarian or a pet poison hotline immediately (ASPCA Animal Poison Control Center or Pet Poison Helpline).
- Do not induce vomiting unless directed by a veterinary professional.
- Rinse the mouth gently with water if plant material is visible, but avoid splashing into the nose or eyes.
- Collect and save any vomit, plant parts, or packaging for identification.
- Transport your pet to the nearest emergency veterinary clinic with all relevant information.
- Provide your pet with fresh water only; do not offer food until cleared by a vet.
The step-by-step response, from the first minute to the vet visit, is in our Potato Plant Poisoning in Dogs and Cats emergency guide.