Emergency? Call now - do not wait for symptoms.
OTC and prescription medications toxic to pets
Medications have been the number-one pet toxin category in the ASPCA's annual report for over a decade. Both over-the-counter and prescription drugs cause serious harm when pets access them accidentally.
Source: ASPCA Animal Poison Control 2024 annual report. Over 170,000 calls received; OTC and prescription medications account for the largest share.
How do pets access medications?
Dropped tablets
A tablet rolling under furniture is found by a curious dog or cat within hours. Use a textured mat under your medication station.
Accessible containers
Most standard pill bottles are not child-proof for determined dogs. Keep medications in a locked cabinet, not a bedside table.
Pill pockets
Medications wrapped in food to give to one pet may be found by another. Give medications with the pet isolated.
Common toxic medications
| Medication | Type | Dogs | Cats | Key risk |
|---|---|---|---|---|
| Ibuprofen | OTC Pain Reliever | EMERGENCY | EMERGENCY | The top cause of pet medication emergency calls. GI ulcers and kidney failure. Even one tablet is serious. |
| Acetaminophen / Paracetamol (Tylenol, Panadol) | OTC Pain Reliever | TOXIC | EMERGENCY | Catastrophic for cats - one tablet can be fatal. Dogs have more margin but it is still dangerous. |
| Naproxen (Aleve, Naprosyn) | OTC NSAID | EMERGENCY | EMERGENCY | Longer-acting than ibuprofen; more severe GI and kidney damage. Very dangerous. |
| Aspirin | OTC Pain Reliever | CAUTION | TOXIC | Occasionally used in dogs under vet supervision. Contraindicated in cats - 40-hour half-life leads to rapid accumulation. |
| Pseudoephedrine (Sudafed, decongestants) | OTC Cold / Sinus | TOXIC | TOXIC | CNS stimulant. Causes rapid heart rate, tremors, and seizures. In many cold and flu tablets. |
| Antihistamines (Benadryl, Piriton) | OTC Allergy | CAUTION | CAUTION | Plain diphenhydramine is sometimes used in dogs under vet guidance. Other antihistamines and combination products can be dangerous. Always check with your vet. |
| ADHD stimulants (Adderall, Ritalin, Concerta) | Prescription CNS Stimulant | EMERGENCY | EMERGENCY | Amphetamines cause hyperthermia, seizures, and cardiac emergencies. Very dangerous. |
| Antidepressants (SSRIs - Prozac, Zoloft) | Prescription Psychiatric | TOXIC | TOXIC | Serotonin syndrome risk. Symptoms include tremors, agitation, vomiting, and seizures. |
| Sleep aids (Ambien, diphenhydramine sleep aids) | Prescription / OTC Sleep | TOXIC | TOXIC | CNS depression, respiratory depression. Combination products with acetaminophen particularly dangerous. |
| Blood pressure medications (beta blockers, ACE inhibitors) | Prescription Cardiac | TOXIC | TOXIC | Cause dangerous hypotension and bradycardia. Dropped tablets are a common accidental ingestion. |
| Opioid pain medications (codeine, tramadol, oxycodone) | Prescription Analgesic | TOXIC | TOXIC | CNS and respiratory depression. Some opioids are used in veterinary medicine at specific doses, but unsupervised ingestion is dangerous. |
| Vitamins D3 (high-dose supplements) | Supplement | TOXIC | TOXIC | High-dose vitamin D causes hypercalcaemia and kidney failure. Rodenticide-grade cholecalciferol is an extreme case. |
Medication FAQ
Can dogs take ibuprofen?+
No. Ibuprofen is one of the most common causes of emergency veterinary visits involving medications. Dogs cannot metabolise NSAIDs the same way humans can. Even a single 200mg tablet can cause stomach ulcers and kidney failure in a small dog. There is no safe dose for home use.
Can cats take paracetamol (acetaminophen)?+
Absolutely not. Acetaminophen is catastrophically toxic to cats. A single 500mg tablet can cause fatal methaemoglobinaemia and liver failure in an average-sized cat. Cats lack the liver enzyme glucuronyl transferase needed to break it down. If your cat has ingested any amount, rush to an emergency vet immediately.
Which human medications are safe for dogs?+
Very few, and only under specific veterinary guidance. Plain diphenhydramine (Benadryl, Piriton) is sometimes used for mild allergic reactions in dogs. Some veterinarians use low-dose aspirin for specific cardiac conditions. The correct approach is always: ask your vet first. Never self-prescribe.
My dog ate my prescription medication - what do I do?+
Call ASPCA Poison Control (888-426-4435) immediately with the medication name, dosage strength, estimated quantity ingested, and your dog's weight. They will assess the specific risk and advise on whether to go to an emergency vet. Do not wait to see if symptoms develop - many prescription drug toxicities have delayed onset.
Also see: Household toxins | Emergency guide
Not veterinary advice. If your pet has ingested any potentially toxic substance, call ASPCA Poison Control 888-426-4435 or Pet Poison Helpline 855-764-7661 immediately. For emergencies, contact your veterinarian. This site is educational only.