Melatonin, a natural hormone that regulates sleep-wake cycles, is sometimes used by veterinarians to help dogs with anxiety, stress, insomnia, cognitive decline, alopecia, or certain adrenal diseases.
While generally considered safe, it should always be given under veterinary guidance since dosage depends on a dog’s size, age, and health.
Side effects can include mild drowsiness, stomach upset, or, in rare cases, changes in heart rate or fertility.
Puppies may occasionally be prescribed melatonin for anxiety, but vets typically avoid it due to the higher risks of hormonal disruption during development.
Although overdose is rare, too much melatonin can cause vomiting, diarrhea, seizures, lethargy, or an increased heart rate.
If a dog accidentally ingests more than recommended, it’s best to call a veterinarian or the Pet Poison Helpline® right away. Even seemingly small amounts, like 5 to 10 milligrams, can have stronger effects on smaller dogs, leading to excessive drowsiness or GI upset.
To keep pups safe, melatonin should only be used with a vet’s approval and given in the correct dosage for each individual dog.
Chewy editorial team understands how important restful nights and calm moments are for both dogs and their pet parents.
With the right guidance from a trusted veterinarian, supplements like melatonin can sometimes offer gentle support for specific needs.
Above all, every choice should be made with a dog’s safety, comfort, and happiness at heart – that is what truly matters most.
