How Long Does It Take For Melatonin To Work On A Dog
Most vets recommend giving your dog melatonin about an hour before bedtime, although some people find that it takes effect faster than that.
The goal of treatment is to help your pet fall asleep more easily and stay asleep longer. If youve recently adopted a puppy or senior dog, you might find this medication helpful if they have trouble sleeping through the night.
If you give your dog melatonin and his sleep problems persist, talk to your vet about other possible causes and solutions.
The precise dosage will depend on your dogs size, age, and other health issues but in general you should start with a low dose and work your way up until you see improvement in your pets symptoms.
- Dogs less than 10 pounds should be given 1 mg of melatonin.
- Dogs weighing 10 to 25 pounds should be given 1.5 mg of melatonin.
- Dogs weighing 26 to 100 pounds should be given 3 mg of melatonin.
Melatonin Dosage For Dogs Chart
Natural supplements are taking the world by storm.
With so many people turning to melatonin for their sleep struggles, it makes sense that it is being explored for use in dogs.
So what is melatonin, and how can it be used in our beloved companions?
In this article we will discuss everything you need to know about melatonin for dogs, and introduce you to our melatonin dosage calculator and chart.
You can find both the melatonin dosage chart and calculator towards the bottom of this article.
Before getting started, it is important to remember that melatonin is not approved by the FDA for use in dogs, and should always be approved by your veterinarian before use.
Melatonin may not help every dog, and can interfere with some prescription medications.
This makes it even more important to seek your veterinarians advice before offering this supplement to your dog.
Changes To Your Dogs Routine
While dogs might be less routine-oriented than cats, they are still sensitive to sudden changes in their daily life. Your dogs health and wellness can be disrupted by shifts like you returning to the office after working from home for an extended period. If your dogs daily routine is going to change in some way, melatonin might be able to support their sleep so they can handle the change with grace and comfort.
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Editors Choice: K9 Choice Melatonin For Dogs
Specially formulated for dogs, this supplement contains 3mg of melatonin per serving- which is more than enough to get your pet relaxed before a stressful event such as fireworks or visits to the groomers. As a chewable tablet with peanut butter flavor, this supplement is not difficult to administer: most dogs will see it as a treat! In case your dog suffers from chronic anxiety, has trouble sleeping or other issues that require regular use of melatonin, this dosage would translate into two chewable tablets per day if they weigh less than 30 pounds, and double that if they weigh more.
What Are The Uses Of Melatonin For Dogs

The main use of melatonin for dogs is, as you can imagine, regulating the sleep cycle. But veterinarians prescribe melatonin to dogs for other reasons, too. And since it’s a naturally occurring, chemical-free hormone that a dog’s body already produces, dog owners can feel good about giving their pet something that’s naturally occurring.
Melatonin can help treat conditions and disorders like:
- Sleep. Sleep problems like insomnia are often caused by an insufficient amount of melatonin in the system. So, adding a melatonin supplement can help regulate your dog’s circadian rhythm and help them sleep at night as they normally would. This is especially helpful for older dogs, who sometimes have more trouble sleeping through the night than their younger counterparts.
- Anxiety and phobias. There are all sorts of anxieties and phobias that dogs suffer from, including separation anxiety, thunderstorm anxiety, and fear of loud noises, just to name a few. Thanks to the calming effect of melatonin, it can work as a solution to help your dog settle down and feel more comfortable.
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How Much Melatonin Can You Give A Dog
Melatonin can be used to relieve many issues in our pets, meaning each dog may require a different dose for maximum benefit.
Because of this, we suggest running any doses by your veterinarian before offering melatonin to your dog.
While you should always get any medication doses from your veterinarian, we will still discuss the standard dosing rates of melatonin for use in our canine companions.
The standard dosing rate for melatonin in dogs includes:
- Dogs under 10 pounds: 1 mg
- Dogs 10 to 25 pounds: 1.5 mg
- Dogs 26 to 100 pounds: 3 mg
- Dogs more than 100 pounds: 3 to 6 mg
The effects of melatonin typically last for about 8 hours, leading most pet parents to give their dog a dose right before bed or before a stressful event.
These instructions can of course vary for dogs that suffer from chronic behavioral issues.
To better understand your dogs recommended dose, you can refer to our melatonin dosage calculator for dogs.
Is Melatonin Safe For Dogs
According to the American Society for the Prevention of Cruelty to Animals , melatonin is a safe supplement to give to your dog. Melatonin has little risk for harmful side effects. The most common side effect is lethargy upon waking the next morning. However, please ensure that you are purchasing melatonin free of added fillers or coatings that could be harmful, or the sweetener xylitol, which can hurt dogs.
While there is little risk of serious side effects from melatonin, it may interact with other medications your dog is on. Talk to your veterinarian before starting your dog on any new supplements, melatonin included.
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How To Get Your Dog To Take Melatonin
Melatonin for pets is taken orally, as a pill, capsule, or liquid. You can give it either with or without food, but note that it might cause vomiting if taken on an empty stomach. If you prefer, you can give it to your dog with a treat or in their regular food.
Administering melatonin as a liquid medication is often easiest, as you can simply open your dogs mouth and gently squirt it with a syringe. Aim for the back of the cheek rather than the throat to help them avoid choking or gagging.
Usually, the easiest way to give your dog a pill is to include it in a treat. Many people put pills in with soft dog food or a small bit of human food, such as cheese or peanut butter. Make sure to watch and see if your dog swallows the pill, as some pets can be sneaky. You may also be able to find chewable melatonin supplements made especially for dogs.
What Happens If A Dog Eats Melatonin
The effect of melatonin on dogs depends on the ingested amount. A dog will be sleepy if it consumes a recommended dose of melatonin, experience mild digestive problems when ingesting slightly larger amounts than the recommended dose, or overdose when consuming too much melatonin.
If your dog eats melatonin, check how much melatonin it has consumed and whether or not the product contains xylitol.
Pure melatonin is unlikely to cause your dogs death no matter how much it eats. But there is still a risk.
The symptoms of a melatonin overdose differ depending on your dogs weight and the amount of melatonin ingested.
Potential side effects in adult dogs* | |
1 mg of melatonin | No sign of overdose if it weighs up to 10 lbs. Otherwise, it can be drowsy. |
5 mg of melatonin | Drowsiness and stomach upset, depending on its weight and the amount ingested compared to the recommended dose.** |
10 mg of melatonin | Vomiting, lethargy, and sleepiness. Itching and an elevated heart rate can occur in small breed dogs. |
20 mg of melatonin | Incoordination, high blood pressure, and seizures. |
30 mg of melatonin | Incoordination, high blood pressure, and seizures. |
*Pregnant or lactating females are not taken into account.
**The recommended dose of melatonin is 1 mg/10 lbs. body weight.
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What To Do If Your Dog Eats Melatonin
Go to the vet immediately if your dog has eaten melatonin and you notice one or more of the symptoms of an overdose. In case of a mild overdose, let your dog sit calmly in a dark and quiet room to recover.
The first thing to do if your dog eats melatonin is to estimate how many melatonin tablets your dog has consumed. Then check the dose on the package to calculate the corresponding milligrams of melatonin.
Melatonin supplements for human consumption are similar to those for veterinary use. They dont cause side effects if they dont contain xylitol and are administered at the recommended dose.
Contact your vet immediately for medical attention if you suspect or calculate that your dog has eaten a high amount of melatonin tablets or gummies.
If the amount ingested is very high, your veterinarian can suggest inducing vomiting to remove the ingested tablets. This is recommended when the amount of ingested melatonin is considered dangerous to be digested.
Do not induce vomiting unless instructed by a veterinarian, regardless of the medicine or substance your dog has ingested.
See a veterinarian immediately if the amount of melatonin ingested is acceptable, but the product contains xylitol.
Choosing A Melatonin Supplements For Your Dog
With such a wide range of melatonin supplements on the market, it can be challenging to find the right one for your dog. Melatonin comes in a variety of formulations for dogs, including pills, drops, powders, lotions, and liquids. Several considerations may be helpful when choosing a melatonin supplement.
- Advice from a vet: Contact your veterinarian before giving your dog a melatonin supplement, especially if your dog is taking other medications, is pregnant or will become pregnant, or has a diagnosed medical condition. A veterinarian can help you select the right supplement and find the appropriate dose.
- Find quality supplements: Because melatonin supplements are not regulated by the FDA, be cautious about trusting what is written on the label. When possible, find a reputable supplement by asking a vet or looking for third-party verification of the product.
- Check the ingredient list: Not all human supplements are safe for dogs. Before giving a supplement to your dog, check the label for toxic ingredients like xylitol. Also check the label to make sure that the melatonin has not expired.
- Watch for side effects: Although generally safe for dogs, look out for side effects after giving melatonin. If you notice any abnormal or concerning symptoms, contact a veterinarian as soon as possible.
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How Your Dog Produces And Synthesizes Melatonin
Melatonin is produced and synthesized by the pineal gland, a small and simple gland located in the brain and is part of the endocrine system. In dogs, the gland is only about 1 millimeter long. Almost all vertebrates have a pineal gland that uses melatonin to dictate sleeping and waking times.
Fun fact: the pineal gland is named as such because it is shaped like a pine cone!
But Is Melatonin Safe For Dogs

While melatonin is considered very safe for dogs, it is always advised that you talk to your veterinarian prior to starting any new medications or supplements to ensure that it does not interact with any other medications your pet may be on, Dr. Nelson urges.
The side effects of melatonin are generally mild, says Dr. Nelson, with the primary side effect being drowsiness, although the following may also occur:
- Interruption of the reproductive cycle of female dogs
- Insulin resistance in diabetic animals
Dr. Nelson adds: It is not recommended to give melatonin to dogs with liver or kidney disease, pregnant or nursing dogs, or puppies under the age of 12 weeks.
And with the dosages being different and the potential additive of toxic artificial sweeteners, do not attempt to share your own melatonin supplement with your pup. While you may share almost everything, it is best to only give them supplements intended for canine consumption and that have their entire ingredients list OKd by your vet.
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Consider Introducing Melatonin For Your Dogs Wellness
Melatonin for dogs can make it easier for canine companions to maintain a regular sleep schedule and get the best rest so they can enjoy their favorite activities. Now that you know this substance is safe and beneficial for your pet and how to make it part of their daily regimen, you can start using melatonin for dogs today. It can be a valuable tool for maintaining your dogs overall wellness and keeping them happy and healthy for years to come!
What About Melatonin For Dogs
As Dr. Nelson reports, melatonin has a few different canine uses: Its a known supplementary treatment for certain endocrine disorders in dogs, such as some atypical forms of Cushings disease, as well as seasonal alopecia. It could also be helpful in treating canine stress disorders.
Melatonin can be used as an over-the-counter recommendation for dogs with aggression and anxiety, says Dr. Nelson. It has been shown to be useful as a part of separation anxiety protocols, for dogs with thunderstorm or fireworks phobias and for dogs with hospital or groomer-associated aggression and anxiety.
Finally, melatonin is very useful for elderly dogs who do not sleep well at night, she continues, explaining that with age-related cognitive dysfunction, the sleep-wake cycle can be interrupted. Melatonin can be given to help these dogs to once again get a good nights rest.
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How Often Can I Give My Dog Melatonin
Can dogs have melatonin every day? As long as your veterinarian says its okay, melatonin can be given to your dog dailyor, more likely, nightly. You may even be able to find a specific form of melatonin for dogs that is guaranteed not to contain harmful additives. Melatonin is usually mild enough to become a regular part of your dogs relaxation routine and may be effective for restlessness, anxiety and insomnia.
How To Dose Melatonin For Dogs
Dont try to dose melatonin without the guidance of your vet. Remember that your dogs needs are unique and may be affected by their specific health conditions or medications.
Your vet might advise that you start with a lower dose and then increase it if your dogs symptoms havent improved. This can also avoid making your dog lethargic or groggy.
The general way of dosing melatonin is by weight.
- Dogs under 10 lbs – 1 mg
- 10-25 lbs – 1.5 mg
- 26-100 lbs – 3 mg
- 100+ lbs – 3-6 mg
Effects usually last eight hours. If you need to give your dog more when they stop responding to the medication, thats fine. But dont give melatonin more than three times a day.
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Is It Safe To Use Melatonin For Dogs
There are a few things you can try if you have trouble sleeping: playing white noise, practicing meditation, counting sheep. Or, you might try taking a supplement like melatonin. This hormonal supplement is often recommended for those who have difficulty falling asleep or staying asleep.
Melatonin is naturally produced by your dog’s pineal gland, just as it is produced by yours. Melatonin helps to regulate our body’s circadian rhythm, or the pattern of waking and sleeping. And it does the same thing for your dog.
But does that mean it’s safe to give your dog your melatonin supplement? It’s important to know a few things before giving your dog melatonin. There are potential benefits and side effects to melatonin for dogs, so you’ll need to consult with your vet before giving it to your pet. Let’s take a closer look at this supplement and how it impacts our canine companions.
My Dog Ate 10 Mg Melatonin: Should You Worry
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10 Mg of melatonin usually doesnt affect a large dog but can have a significant effect on smaller dogs. The therapeutic dose is 1 mg/10 lbs. of body weight, meaning smaller dogs can overdose on 10 mg of melatonin. Contact your veterinarian if your dog shows symptoms of a melatonin overdose.
Melatonin is a natural hormone secreted by the pineal gland of mammals, including humans and dogs. This secretion helps regulate sleep-wake cycles, sending messages when its time for the body to relax and prepare for rest.
For dogs, melatonin is used as a sleeping pill and helps them fight separation anxiety or get over storms or noisy events. Melatonin is also used in the form of melatonin implants for recurring hair loss.
Even though melatonin has all these benefits for dogs, it has to be recommended by your veterinarian.
It is never a good idea to give your pet supplements without understanding what you are giving it.
In this article, you will find out what happens if your dog eats 10 mg of melatonin, if melatonin is safe for dogs, how much melatonin is lethal for a dog, and much more.
Dont forget to consult your veterinarian before you give melatonin to your dog.
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Potential Side Effects And Risks Of Melatonin For Dogs
Like all supplements, Melatonin may cause adverse reactions in super-sensitive dogs. Here are the potential side effects of Melatonin:
Although natural and generally safe, Melatonin should not be used in dogs:
- Dogs with allergic reactions to the active ingredient
- Dogs receiving medications with known drug interactions
- Dogs diagnosed with diabetes
- Actively bred dogs .
Finally, a quick reminder if using human Melatonin supplements, ensure they do not contain artificial sweeteners. The most commonly used artificial sweetener, xylitol, is toxic to dogs.