Is Hydroxyzine (Atarax) Safe for Dogs?
Why it’s conditional
Hydroxyzine has been used in veterinary medicine for itching and anxiety, so a single swallowed tablet generally causes drowsiness rather than danger in a dog. Larger ingestions can cause deep sedation, rapid heart rate, and low blood pressure. It is a prescription drug, which reflects real side effects and interactions, not a supplement.
How to keep your pet safe
Store Atarax out of reach and only use it in a dog when a vet has prescribed it. Do not combine it with other sedating drugs or supplements without veterinary advice.
Warning signs to watch for
Drowsiness, wobbliness, dry mouth, vomiting, constipation; larger ingestions can cause deep sedation, rapid heart rate, and collapse.
When to call the vet
Call your vet or a pet poison hotline with the amount swallowed. Heavy sedation, stumbling, or a racing heart means your dog should be examined.
Common questions
My dog ate one of my Atarax tablets — will it be OK?
A single tablet usually causes sleepiness in a dog rather than harm, but your vet or a poison hotline can judge the dose against your dog’s size. Call with the tablet strength if you know it.
My dog is very wobbly and sleepy after eating several hydroxyzine pills — now what?
That level of sedation is beyond a mild effect and deserves hands-on care. Get your dog to a veterinarian and bring the bottle.
Can Atarax calm my anxious dog?
Only under veterinary direction. Vets have better, safer options for canine anxiety, and hydroxyzine can interact with other drugs your dog takes.
More medications hazards for dogs
This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate or touched something concerning, contact your veterinarian or a pet poison hotline right away. In the US: Pet Poison Helpline (855) 764-7661, ASPCA Animal Poison Control (888) 426-4435 (fees may apply).