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My dog ate melatonin pills. Is 25mg too much? Do I need a vet?

Updated On September 23rd, 2025

Pet's info: Dog | French Bulldog | Male | unneutered | 4 months and 29 days old | 15 lbs

My dog ingested 5mg melatonin pills. Not sure how many but pretty sure it was not more then 5. I made him throw up 3 times and did see about 3 dissolved pills. Should I take him to the vet?

2 Answers

Most Helpful Answer

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Answered By Eryn Taormina, DVM

Veterinarian

Published on November 12th, 2018

Hi there! I'm sorry to hear about Biggie's troubles! Although there is limited information on the overdosage and toxicity of melatonin in dogs, it is assumed that it is unlikely to cause severe issues with one accidental overdose. Melatonin can actually be prescribed for various medical conditions. In Biggie's case, 10-25mg is a little much, but again, it shouldn't really cause a problem if it just happened this one time. I would keep an eye on Biggie for a few days. Make sure he is acting like his normal self, isn't lethargic or depressed. Make sure he is eating and drinking normally and having normal stools. If he appears sick at any time, you should of course have him evaluated by his veterinarian. Another option you do have, is to call poison control. They may have some more specific information on the potential toxic effects of melatonin. As far as potential toxins go, they always have the most up to date information, and can really put your mind at ease 100%. However, I again do not think that 10mg should pose a huge problem. I hope you find this answer helpful! Best of luck!

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Other Answers

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    Answered By Andrea M. Brodie, DVM

    Veterinarian

    Published on

    This should not be a problem. Possible effect may be that your dog is sleepy for a while as Melatonin has a sedative effect. Watch out for the following side effects: Upset stomach and cramps Tachycardia Itching Confusion Fertility changes I do not think, however, that your dog will have any problems. Should any of those signs occur, take Biggie to a veterinarian for an exam.

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