Is Duloxetine (Cymbalta) Safe for Dogs?
Why it’s a problem
Duloxetine alters serotonin and norepinephrine signaling, and dogs that swallow capsules can develop serotonin syndrome — agitation, tremors, rapid heart rate, high body temperature, and seizures. Dogs are frequently poisoned by chewing into dropped or stored pill bottles. Severity scales with the dose and the size of the dog, and small dogs can be badly affected by one capsule.
How to keep your pet safe
Store all antidepressants in closed cabinets rather than on nightstands or in bags — chewable capsule bottles are a favorite target. Never give any human antidepressant to your dog, including leftover prescriptions. If a pill spills, secure the dog and find every capsule.
Warning signs to watch for
Agitation, restlessness, drooling, vomiting, rapid heartbeat, high body temperature, tremors; more severe cases: seizures, muscle rigidity, collapse.
When to call the vet
Call a veterinarian or pet poison hotline immediately after any known or suspected ingestion, even without symptoms. Report the number of capsules and your dog’s weight — early decontamination prevents the worst outcomes.
Common questions
My dog ate one Cymbalta capsule — is that serious?
It can be, especially for a small dog — duloxetine can trigger serotonin syndrome with tremors, high temperature, and seizures. Call your veterinarian or a pet poison hotline now rather than watching and waiting.
Can duloxetine be used for dogs?
Some antidepressants are used in veterinary medicine, but only a veterinarian can decide that and set a dose. Never share your own prescription with a dog.
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).