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Melatonin for Dogs (Australia Guide)

Illustration — Calm dog under a crescent moon

Published July 13, 2026 · Reviewed July 13, 2026 · By Best Melatonin for Dogs Editorial Team

Melatonin is a hormone that signals night-time to the body clock, and in Australia melatonin calming supplements for dogs are sold over the counter to help support calmness and settled sleep. It is used off-label with veterinary guidance and appears in many companion-animal calming products. Talk to your vet before use, especially if your dog is on medication.

Ownership disclosure: This website is owned by Pure Majesty Pets, which sells a melatonin liquid supplement for dogs mentioned in our comparisons. Read owned-product coverage with that in mind. Full disclosure.

What the evidence shows

Evidence: Moderate, situationalIn healthy dogs, oral melatonin before anaesthesia had a mild calming effect and reduced the propofol induction dose (Niggemann 2019). This supports situational calmness in supervised settings rather than treating a behavioural condition.

How melatonin is sold in Australia

Melatonin calming supplements for dogs are available over the counter as companion-animal products. Under the APVMA framework, a product cannot make therapeutic claims (such as treating anxiety) unless registered, so reputable products describe calming support rather than treatment. Your vet can also advise on use or compound a product where appropriate. For the full research background, see our complete guide.

Read alsoIs melatonin safe for dogs? (Australia) — safety, the xylitol risk, and the Animal Poisons Helpline.

When it is used

Owners commonly consider it for fireworks and thunderstorm nights, unsettled senior sleep, and travel — always with veterinary input.

Pure Majesty Pets Melatonin for Dogs — labeled actives per 1 mL

Manufacturer-supplied formulation, current as of July 2026
Active ingredient	Per 1 mL
Melatonin	3 mg
L-theanine	50 mg
Alpha-casozepine	25 mg
Water-soluble chamomile extract	25 mg
Elemental magnesium	5 mg
Vitamin B6 (as P5P)	0.5 mg

Manufacturer-supplied formulation for Pure Majesty Pets Melatonin for Dogs, published on the product page and current as of July 2026. As a companion-animal supplement it can be used to help support calmness in healthy dogs; the amounts describe the contents and do not by themselves prove a calming or sleep outcome, and this exact six-active blend has not been tested in a published canine trial. Confirm availability and shipping to Australia before ordering.

See the current Pure Majesty label and product details

Frequently asked questions

Can I give my dog melatonin in Australia?

Yes — melatonin calming supplements for dogs are sold over the counter in Australia, and it is widely used to help support calmness and settled sleep. Check with your vet first if your dog is on medication or unwell, and avoid human products that may contain xylitol.

Is melatonin for dogs sold over the counter in Australia?

Yes. Melatonin-containing calming chews, drops and supplements for dogs are available without prescription from Australian retailers and online. Your vet can also advise or arrange a compounded product if needed.

What does melatonin do for dogs?

It supports the sleep-wake cycle and may help maintain calmness in healthy dogs in some situations. The strongest evidence is from supervised settings, such as before anaesthesia (Niggemann 2019).

Sources

Niggemann JR, Tichy A, Eberspächer-Schweda MC, Eberspächer-Schweda E. Preoperative calming effect of melatonin and its influence on propofol dose for anesthesia induction in healthy dogs. Veterinary Anaesthesia and Analgesia. 2019;46(5):560–567. doi:10.1016/j.vaa.2019.02.009
VCA Animal Hospitals. Melatonin. Hamilton A, Gollakner R. vcahospitals.com
Merck Veterinary Manual. Toxicoses in animals from human antidepressants, anxiolytics, and sleep aids. Full review May 2025. merckvetmanual.com
U.S. Food & Drug Administration. Paws Off Xylitol; It’s Dangerous for Dogs. Consumer update. fda.gov

Veterinary note (Australia). This is educational information, not veterinary advice. Melatonin calming supplements for dogs are sold over the counter in Australia as companion-animal supplements; your vet can also advise on use or arrange a compounded product where appropriate. Talk to your vet before use, especially if your dog is on medication or has a health condition. For a suspected poisoning, call your vet or the Animal Poisons Helpline on 1300 869 738 (a free 24/7 service).