PawAI LabPawAI LabTry it Free

Is Nightshade Toxic to Cats? Safety Verdict and What to Do

PawAI Lab
4 min read

Learn whether nightshade poses a toxicity risk to cats, what signs may appear after exposure, and what immediate steps to take if your cat may have been exposed.

Quick Answer

Yes, nightshade is toxic to cats. Plants include tomato plants, potato plants, and nightshade. Ripe tomatoes and cooked potatoes are much less toxic than green parts. If your cat may have been exposed, contact a veterinarian or animal poison-control service right away, even if no signs are visible yet.

Before using any tool, contact a veterinary professional if your cat may have been exposed.

  • US: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • UK: Animal PoisonLine (01202 509000) or your nearest veterinary emergency clinic
  • Canada: ASPCA Animal Poison Control (888-426-4435) or Pet Poison Helpline (855-764-7661)
  • AU: Animal Emergency Centre or your regular vet
  • EU: Contact your nearest veterinary emergency service

TOXICITY CHECKER

Check whether a substance may be harmful to your pet and get prioritized safety steps.

Check Toxicity

This tool provides general safety information and does not replace veterinary advice in an emergency.

Safety Verdict

Toxic. These glycoalkaloids affect the nervous system by inhibiting acetylcholinesterase and disrupting cell membranes. They also cause GI irritation. Highest concentrations are in green parts and sprouts.

Plants include tomato plants, potato plants, and nightshade. Ripe tomatoes and cooked potatoes are much less toxic than green parts.

What It Is

Deadly nightshade (Atropa belladonna) and related species contain toxic alkaloids including solanine. All parts are toxic, with the highest concentrations in unripe berries and leaves.

Why It May Be Harmful

The toxic principle in nightshade is solanine and chaconine (glycoalkaloids). These glycoalkaloids affect the nervous system by inhibiting acetylcholinesterase and disrupting cell membranes. They also cause GI irritation. Highest concentrations are in green parts and sprouts.

Signs of toxicity may include:

  • Vomiting
  • Diarrhea
  • Lethargy
  • Loss of appetite
  • Confusion
  • Slow heart rate
  • Muscle weakness
  • Tremors

Timeline: Signs typically develop within a few hours.

Usually mild to moderate. Severe cases are uncommon.

What to Do If Your Cat Eats It

  1. Contact a veterinarian or animal poison-control service for guidance.
  2. Remove any remaining substance from your cat's reach.
  3. Offer fresh water if your cat is willing to drink.
  4. Monitor for signs and contact a veterinarian if they develop or worsen.

Information to have ready when you call:

  • Your cat's age, approximate weight, and any health conditions
  • The name or type of nightshade and the estimated amount consumed
  • When the exposure likely occurred
  • Any current symptoms your cat is showing
  • The product packaging or a photo of the plant if applicable

If only a small amount of ripe fruit was consumed with no signs, monitoring may be appropriate after consulting a veterinarian.

When to Contact a Veterinarian

Contact a veterinarian or animal poison-control service immediately if your cat may have been exposed to nightshade. Do not wait for symptoms to develop.

Emergency signs that require urgent veterinary attention:

  • Tremors or seizures
  • Severe lethargy
  • Persistent vomiting
  • Slow or irregular heart rate

Non-urgent follow-up: If only a small amount of ripe fruit was consumed with no signs, monitoring may be appropriate after consulting a veterinarian.

FAQ

Are tomato plants toxic to cats?

Leaves, stems, and green tomatoes contain solanine. Ripe red tomatoes contain much less. Keep plants out of reach.

Are raw potatoes dangerous?

Raw potatoes, especially green or sprouted ones, contain solanine. Cooked potatoes contain less but are not recommended for cats.

What is deadly nightshade?

Deadly nightshade (Atropa belladonna) is highly toxic. All parts contain toxic alkaloids.

TOXICITY CHECKER

Concerned about another plant, food, medication, or household item around your cat? Get general, species-aware safety information to help you decide your next step.

Try Toxicity Checker

This tool provides general safety information and does not replace veterinary advice.

Sources

Disclaimer

This article and the PawAI Toxicity Checker tool provide general safety information and do not replace examination, diagnosis, or treatment by a licensed veterinarian. If your cat may have ingested a toxic substance, contact a veterinarian, emergency clinic, or animal poison control immediately.