Is Fluoxetine (Prozac) Safe for Dogs?
Why it’s conditional
Fluoxetine is an SSRI that veterinarians frequently prescribe for dogs with anxiety or compulsive behaviors, so the drug itself is not off-limits. The danger is dose and formulation: human capsules are sized for people, and a dog that eats several pills can develop serotonin syndrome, which has been reported to cause tremors, agitation, and seizures.
How to keep your pet safe
Ask your vet for a pet-appropriate prescription and give it exactly as directed. Keep bottles sealed and stored high up, since chewed bottles are a common ingestion route. Never substitute your own fluoxetine for your dog’s prescription.
Warning signs to watch for
Drowsiness or the opposite — agitation, tremors, rapid breathing, fast heart rate, vomiting, diarrhea, loss of appetite; large ingestions: fever, muscle rigidity, seizures.
When to call the vet
If your dog eats your pills, call your veterinarian or a pet poison hotline with the pill strength and your dog’s weight. Do not induce vomiting unless instructed by a professional.
Common questions
My dog ate my Prozac — is it poisonous to him?
It can be — dogs take fluoxetine under vet care, but human capsules are much larger than a dog dose. Call your vet or a poison hotline with the strength and an estimate of how many pills were eaten.
Can I split my own fluoxetine for my anxious dog?
No. Never self-dose a pet with human medication — only your veterinarian can prescribe the right product and dose.
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).