One of the most common causes of pet poisoning that we see at Shivraj Pet Clinic & Lab is well-intentioned owners giving human medicines to their pets. What is safe — or even therapeutic — in humans can be fatal in dogs and cats. Never give your pet any human medication without first consulting your veterinarian.
Most Dangerous Human Medicines for Dogs and Cats
1. Paracetamol (Crocin, Dolo, Tylenol)
Extremely toxic to cats. Dangerous to dogs in any dose.
Cats completely lack the liver enzyme (UGT1A6) needed to metabolise paracetamol. Even a single tablet can cause fatal liver failure and haemoglobin destruction in cats. Dogs can also suffer severe liver damage. There is no safe dose — never give paracetamol to any pet.
Signs of paracetamol toxicity: facial swelling, brown/blue gums (methaemoglobinaemia), laboured breathing, jaundice, collapse.
2. Ibuprofen and Diclofenac (Brufen, Combiflam, Voveran)
Toxic to both dogs and cats.
NSAIDs like ibuprofen cause gastrointestinal ulceration, kidney failure, and neurological signs in pets. Even one tablet of ibuprofen can cause severe gastric ulcers and kidney damage in a medium-sized dog. Diclofenac has caused mass deaths in vultures in India and is similarly dangerous to companion animals.
3. Aspirin
Aspirin is occasionally used in dogs at very specific doses under veterinary supervision — but even here, errors can be fatal. Cats cannot metabolise aspirin at all. A single aspirin tablet every 48 hours can accumulate to toxic levels in cats. Never use aspirin without explicit veterinary direction and dosing.
4. Antidepressants and Sleep Aids
Human antidepressants (SSRIs, tricyclics) and sedatives cause serious neurological toxicity in pets — tremors, seizures, cardiac arrhythmias, and coma. These are among the most common causes of accidental pet poisoning.
5. Xylitol (in sugar-free products and some medicines)
Xylitol is a sugar substitute found in sugar-free gum, some peanut butter brands, vitamin gummies, and oral care products. In dogs, it causes a rapid, severe drop in blood sugar (hypoglycaemia) and liver failure. Even small amounts — the equivalent of a few pieces of sugar-free gum — can be fatal to a small dog.
6. Vitamins and Supplements
Vitamin D (cholecalciferol) in excess is a common rat poison ingredient and causes fatal hypercalcaemia in pets. Vitamin C in high doses causes gastrointestinal upset. Iron supplements cause gastrointestinal haemorrhage and liver damage.
What to Do in Case of Accidental Ingestion
If your pet has consumed any human medication:
- Do not wait for symptoms to appear
- Call us immediately at 077569 65169
- Note the exact medication name, dose/tablet strength, and approximately how much was consumed
- Bring the packaging with you
Early treatment — within the first 1–2 hours — dramatically improves outcomes for most toxicities. Do not induce vomiting at home without veterinary guidance, as this can sometimes cause additional harm.
Shivraj Pet Clinic is open Mon–Tue and Thu–Sun at our Wakad & Pimple Saudagar area clinic. For emergency guidance, call 077569 65169.
