Every year, human medications are the single largest category of calls to the ASPCA Animal Poison Control Center. Some of those calls are accidents, a chewed bottle or a dropped pill. Others start with kindness: an owner giving a sore or itchy dog something from the family medicine cabinet. This library exists for that second group. Each page gives a verdict in the same format as our can dogs eat library: what the cited veterinary sources say, the risks, the label traps, and when, if ever, a veterinarian uses the medicine in dogs.
Call your veterinarian, the ASPCA Animal Poison Control Center on (888) 426-4435, or the Pet Poison Helpline on (855) 764-7661 right away, even if your dog looks fine. Some poisons take hours or days to show their worst effects. Do not make your dog vomit unless a veterinarian tells you to, and keep the packaging, a photo, or a sample of what was eaten to show the clinic.
Vet-directed only. Plain diphenhydramine is one of the few human medicines veterinarians do use in dogs, but only the plain product, only for the right dog, and at a dose your vet sets.
Vet-directed only. Some veterinarians do recommend Pepto-Bismol for dogs with mild digestive upset, but its aspirin-like ingredient rules it out for many dogs, and it can hide the very sign, bleeding, that a vet needs to see.
Vet-directed only, with a hard exception. Imodium can be appropriate for diarrhea in certain dogs, but it can seriously harm dogs with the MDR1 gene mutation, and it must never be used when diarrhea may be caused by infection, a toxin or a blockage.
Do not give on your own. Aspirin is an NSAID that veterinarians have largely moved away from in dogs because it erodes the stomach lining even at therapeutic doses. If a vet ever uses it, it is their decision, their dose and their monitoring.
DANGER: never give ibuprofen to a dog. Not in any amount, not for pain, not once. Ibuprofen has a narrow margin of safety in dogs and is one of the most common medicine poisonings vets treat.
DANGER: never give acetaminophen to a dog on your own. Tylenol can destroy red blood cells and fail a dog's liver, and in cats it can be lethal in a single tablet. This is a poison, not a pain plan.
For the wider picture, our household toxins guide covers accidental medicine exposure alongside antifreeze, rat poison and xylitol, and the toxic plants database covers the garden.
A few human medicines are used in dogs by veterinarians, off-label, at dog-specific doses. That is a vet decision made for one dog with its full history in view. It is never a standing permission to use your own judgment and your own medicine cabinet.
Dogs absorb, distribute and clear many drugs differently from people, and tablet strengths are made for adult humans. A fraction of a human dose can still be an overdose for a small dog, and a human-sized dose can poison a large one.
Speed and information: the exact product, the strength, how many tablets are missing, your dog's weight, and the time. Call your vet or a poison line with those five facts and follow their instructions.
Ibuprofen and acetaminophen head the list: neither has a safe home dose, and both can cause organ failure. Aspirin should also never be given on your own. Dog pain belongs on dog-approved medicines from a vet.
Not reliably. Children's liquids may contain xylitol, and dogs lick topical products off their skin, swallowing them. Read every label and ask your vet before using any human product on or in your dog.
Store them in closed cabinets, treat pill organizers as chewable, count dropped pills until each is found, and never leave medicines in bags or pockets on the floor. Most medicine poisonings start with a container a dog could reach.
This page is general information drawn from the published guidance of the organizations listed under Sources below. It is not veterinary advice, and it does not replace your own veterinarian, who knows your dog. If your dog has eaten something toxic, contact your veterinarian, the ASPCA Animal Poison Control Center on (888) 426-4435, or the Pet Poison Helpline on (855) 764-7661 straight away. A consultation fee may apply on the helplines.
Last updated: November 2026. Every verdict on this page was checked against the sources listed above. How we work: our methodology.
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