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Is Melatonin Safe for Dogs?

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Update: May 5, 2023
3 min read

Written by

Manya Mishra
Content Writer
Is Melatonin Safe For Dogs?

Melatonin is also commonly known as the sleep hormone, which regulates the sleep-wake cycle in humans. Today, the use of melatonin supplements has seen a rise in adults. It can be safe for adults when used in the correct dosages after consulting with a physician. But is melatonin safe for dogs? Can you give it to your canine friend for a stress-free good night’s slumber? Find out everything you need to know about melatonin for dogs right here!

What Is Melatonin?

Melatonin is a hormone produced in the pineal gland. It tells you when to fall asleep and wake up. Melatonin levels tend to go up as the sun sets and drops as the sun rises. To sum it up, it is associated with the amount of light you expose yourself to.

Is Melatonin Safe for Dogs?

Can dogs have melatonin? Melatonin is usually a safe supplement for your dogs as it is a naturally occurring compound found in animals. It has minimal side effects, and the most common one is lethargy. However, you must not give your dog melatonin without the okay of the vet. In a puppy, melatonin is usually prescribed for sleep and behavioural issues, along with non-allergic hair loss known as alopecia. 

How Does Melatonin Affect Dogs?

Melatonin has a soothing effect on dogs. It can be beneficial in controlling anxiety, restlessness, and hyperactivity. Some doctors even prefer using melatonin before surgery as it requires less anaesthesia. Some vets prescribe the supplement after the dogs are neutered to balance their hormones after the procedure.

How Much Melatonin Should I Give My Dog?

The general dosage recommendations are 1 to 6 milligrams every eight to 24 hours and are usually administered orally. It is taken with or without food. The composition of melatonin supplements tends to vary. Depending on that, the dosage may also differ. However, the correct dosage depends on the condition. 

So, how long does melatonin take to work? It takes about one to two hours.

Potential Side Effects

If you are wondering, can I give my dog melatonin? You can, after consulting with your vet. But will melatonin hurt dogs? Well, let’s take a look at some potential side effects. 

  • Fertility issues 
  • Stomach cramps 
  • Gastric problems 
  • Confusion 
  • Lethargy 
  • Itching 

When to see a Doctor?

If you notice any side effects of melatonin in your dog, it is essential to consult a vet immediately. Unlike humans, dogs will not be able to describe their condition, and DIY medications may deteriorate the issue.


Melatonin is a safe and effective supplement for dogs with minute side effects. However, you must always talk to your dog’s doctor before starting the supplement because it is always better to be safe!


How much melatonin is safe for a dog? 

Anywhere between 1-6 milligrams of melatonin is safe for dogs. But the right dosage depends on the dog’s condition, height, and weight.

What happens if a dog has melatonin? 

If your dog eats melatonin that’s meant for human beings, it can show signs of sleepiness and can experience stomach issues. Therefore, it is essential to consult your vet immediately.

Can I use human melatonin on dogs?

No, most human supplements are not good for dogs. Therefore, you must only opt for melatonin meant for your pooch.

 Is 3 mg of melatonin safe for a dog?

1-6 mg of melatonin is safe for your dog, but it also depends on its height and weight.


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Written by

Manya Mishra
Content Writer
Bachelor's Degree in English Literature 7 years of experience as a content writer Has experience writing for various industries, including health and wellness, travel, and technology

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