Why cats are the vulnerable ones
Cats metabolize many compounds differently from dogs and people, which is why the toxicity lists feel arbitrary: one Tylenol can kill a cat (PetMD). Less than half a pill of a human NSAID can be fatal, causing stomach ulcers and rapid, severe kidney failure (PetMD). And a dog flea product applied to — or groomed off — a treated dog can cause severe neurological toxicity in a cat (PetMD).
The dangerous part of home triage is how vague the signs are. They overlap with a dozen ordinary illnesses, which is exactly why the phone call comes first.
Signs that should raise the alarm
PetMD's symptom list, in the order owners usually notice:
- Digestive: drooling, vomiting, diarrhea, refusing food.
- Behavioral: hiding, restlessness, weakness, lethargy.
- Neurologic: incoordination (ataxia), trembling, muscle twitching, seizures, coma.
- Respiratory and cardiac: rapid or heavy breathing, increased heart rate.
- Whole-body: fever, increased thirst and urination, yellowing of the skin, gums or eyes (icterus).
The Red Cross first-aid guidance adds external or internal bleeding, dilated pupils, foaming at the mouth, and swollen or irritated skin or eyes. Bottom line from both sources: if you saw the exposure, don't wait for the symptoms to confirm it.
The toxins that account for most cases
PetMD's most-suspected list for cats:
- Human medications. Acetaminophen (one tablet can be fatal), NSAIDs such as ibuprofen and naproxen (fatal at under half a pill), antidepressants — Effexor reportedly attracts cats by smell or flavor — plus benzodiazepines, sleep aids and thyroid medication.
- Dog flea and tick products. Pyrethrins and pyrethroids such as permethrin are common in canine products and highly toxic to cats. Never apply a dog product to a cat, and keep cats away from recently treated dogs (PetMD).
- Toxic plants. True lilies top the list — ingestion of even tiny amounts can cause life-threatening kidney failure (PetMD).
- Household items. Antifreeze, rodenticides (including vitamin D-based baits), cleaners and bleach, alcohol, and essential oils (Red Cross).
- Foods. Onions and garlic, chocolate, grapes and raisins, avocado, salty snacks, moldy food and raw bread dough (Red Cross).
What to do in the first five minutes
- Call first. Your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 — the number both sources list. Calling before symptoms appear is the whole point (PetMD, Red Cross).
- Gather the facts. Product name, active ingredient, amount, time of exposure, your cat's weight and current signs. Photograph the label; bring the packaging (Red Cross).
- Do not induce vomiting at home. Both sources are explicit: it can make things worse with some toxins. Vomiting should only ever happen under veterinary guidance (PetMD).
- Match the route. Inhaled — fresh air immediately. On the skin — ask before washing, because water activates some poisons (Red Cross). Ingested — ask before anything by mouth.
- Transport carefully. A carrier, a calm car, straight to the hospital. Bring the poison with you — the case number and the substance drive treatment (PetMD).
Frequently asked questions
What are the most common signs of poisoning in cats?
Drooling, vomiting, diarrhea, weakness, hiding, incoordination, tremors, rapid breathing and lethargy are the usual presentation (PetMD). The Red Cross list adds bleeding, dilated pupils, foaming and seizures. None of these are specific to poisoning — which is why the exposure history decides.
My cat may have eaten a lily. What do I do?
Treat it as an emergency even if she seems fine. True lilies can cause life-threatening kidney failure from tiny amounts (PetMD). Call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435 immediately, and bring any remaining plant material.
Can I make my cat vomit after a suspected poisoning?
No. PetMD and the Red Cross both say never to induce vomiting at home — for some toxins it causes more damage than the poison itself. Vomiting should only be done with veterinary guidance (Red Cross).
Can dog flea medicine poison a cat?
Yes — pyrethrin and pyrethroid products such as permethrin, common in dog flea treatments, are highly toxic to cats, including through grooming a recently treated dog (PetMD). Never use dog products on cats, and check labels before treating multi-pet households.