How Long Does Melatoninlast For Sleep
Disclaimer: This article is for informational purposes only and should not be taken as medical advice.
Weve all had restless nights. Whether tossing and turning is a nightly occurrence or this is the first time youre up counting sheep, youve likely heard of the popular sleep aid melatonin. But what is melatonin, and how long does melatonin last for sleep?
Melatonin is a naturally occurring hormone that can help promote sleepiness, so you fall asleep fast. Many people have turned to melatonin supplements, which are available over the counter, to help them catch some zzzs in a pinch.
Before using melatonin, its essential to understand the potential impacts it can have on your health. Keep reading to learn everything you need to know about using melatonin for sleep.
I Hear From Patients All The Time Who Have Tried Melatonin To Help With Their Insomnia Only To Find That It Made Them Feel Even Worse Than When They Cant Get Enough Sleep
I am constantly being asked How much melatonin should I take to sleep? and Why doesnt melatonin work for me? There are plenty of reasons why this sleep-associated hormone might not be working for you, but two of the most common are 1) that you may not need it, or 2) you may be taking it incorrectly.
Concerned about symptoms like insomnia, fatigue, or exhaustion? Take our free quiz to connect the dots between your symptoms and your overall health and find out how you really feel.
Why People Take Melatonin Supplements
Melatonin available in supplement form is made synthetically in a lab and sold as holistic medicine. It can be taken as a pill or quick dissolve tablet, and is used to treat a variety of sleep disorders such as jet lag, shift work sleep disorder, and sleep deprivation.
Melatonin supplements may also be used to treat insomnia related to traumatic brain injuries, ADHD, and sleep issues in children with autism, cerebral palsy, and other developmental disabilities.
Some people even use melatonin supplements to help improve sleep after stopping benzodiazepine use and smoking cigarettes. Some find relief using melatonin supplements when suffering from Alzheimers disease, bipolar disorder, chronic obstructive pulmonary disease, and insomnia caused by beta-blocking medications.
While its important to always consult with your doctor before taking any new supplements, melatonin can generally be taken by those who have high blood pressure, Seasonal Affective Disorder , chronic fatigue, migraines, and a variety of other health conditions. Sometimes cancer patients use melatonin to help prevent some of the side effects of chemotherapy.
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Melatonin Dosage For Older Adults
Our melatonin levels naturally , disrupting the sleep-wake cycles for many older adults. As a result, older adults may have an increased sensitivity to melatonin. In a meta-analysis of 16 studies, melatonin dosages between 0.1 milligram and 50 milligrams per kilogram were administered to older adults aged 55 to 77 years old. In all of the studies, the melatonin levels remained higher among the older adults when compared to younger adults and stayed higher for a longer period of time leading to increased daytime drowsiness. The more melatonin the person took, the more pronounced these effects.
As a result, researchers recommend older adults start with the lowest dose of melatonin possible. Lower doses may help older adults sleep better without disrupting their circadian rhythms and causing prolonged drowsiness.
Older adults with dementia should avoid melatonin, according to the American Academy of Sleep Medicine.
What Exactly Is Melatonin

Your body naturally produces melatonin, a hormone secreted by the pineal gland in the brain, playing a key role in regulating the bodys sleep/wake cycle.1 The brain increases the production of melatonin when it’s dark and decreases its production when it’s light. That explains why being exposed to blue light in the evening can inhibit the production of melatonin2 It is best to limit exposure to blue light at least 30 minutes before bedtime.
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Melatonin Side Effects In Children
The most common melatonin side effect in children is morning drowsiness. Other common side effects in children include:
- Possible increased risk for seizures in children with severe neurological disorders.
Dietary melatonin supplements can still have drug interactions or health risks if you have certain medical conditions, upcoming surgery, or other health concerns.
Cautions With Other Medicines
Some medicines and melatonin can interfere with each other and increase your risk of side effects.
Certain medicines may increase or decrease the drowsy-making effects of melatonin.
Speak to a doctor or pharmacist before taking melatonin if you take any of the following:
- antidepressants such as fluvoxamine or imipramine
- blood pressure lowering medicines
- zaleplon, zolpidem or zopiclone
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How Long Does It Last
The plasma half-life is quite short and ranges between 20 and 50 minutes. This means that approximately only half of the dose remains in your system after this amount of time. This means that while it may help you fall asleep faster, it likely wont help you to stay asleep or increase the quality of your sleep.
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Is Melatonin Safe To Take Every Night
Americans arent sleeping well. Roughly 80% of U.S. adults say they struggle to fall asleep at least one night a week, according to a recent Consumer Reports survey. And research has found that sleep problems are also on the rise among adolescents.
While the causes of Americas sleep woes are up for debate, theres little disagreement about Americas favorite remedy: Melatonin, the countrys most-used sleep aid.
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What Is The Right Dosage Of Melatonin: How Much Is Too Much
Knowing how much melatonin to take is tricky, especially since some brands may recommend a dosage thats more than your body actually needs.
As you shop around, youll find that some melatonin supplements contain as much as 5 to 10 milligrams per serving.
Generally speaking, most people produce enough melatonin to sleep well. If you need a little extra to reset your sleep cycle, you probably dont need more than 3 mg. Some people sleep better with as little as 0.3 to 0.5 mg.
Melatonin needs vary from person to person. Since melatonin can have many effects on the body, like all drugs, it should be taken at the lowest dose possible, warns Dr. Jacobowitz.
With that being said, start with a low amount. If you still have problems sleeping, gradually step up your dose until you find an amount that improves sleep without causing side effects.
Less is more with melatonin to avoid sleep inertia. This is a common problem with some sleeping pills. Some people complain of a hungover or groggy feeling in the mornings due to remnants of the sleep aid remaining in their bloodstream.
This effect doesnt typically occur with melatonin, but it can happen if you take too much the night before.
Melatonin is also safe for children. And like adults, some children dont need a lot of the supplement to sleep better.
Again, start your child at a lower dose, and then gradually increase the amount of melatonin as needed. Talk to your doctor for advice on appropriate dosages.
Can I Overdose On Melatonin
While severe side effects are unlikely, taking too much melatonin at once can disrupt your sleep-wake cycle and could result in next day grogginess. Because each personâs sleep cycle is different, as well as each personâs height, weight and sensitivity to hormones, there is no one-size-fits-all dose of melatonin that will work for everyone. Itâs best to start with a low dose of melatonin. If you give your body more than it needs, itâs possible to have the opposite effect and disrupt your sleep-wake rhythm, making it even more difficult to fall asleep.
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What Can You Expect With A Melatonin Overdose
If you think youâve taken too much melatonin and begin to have unwanted side effects, donât worry. Compared to other sleep supplements and medications, melatonin moves through your body very fast. Because of this, its effects donât last very long.
If you develop slight side effects, try to wait it out a bit and let your body fully process the supplement.
But if the symptoms become strong or you feel concerned, it might be a good idea to call your doctor or poison control at 222-1222. They can help you find the next step or guide you through certain symptoms.
If your child has taken too much melatonin, first make sure that they no longer have access to the supplement. Then, wipe their mouth out with a soft, wet cloth. Donât try to make them throw up the melatonin that they took.
Afterward, call poison control right away. Theyâll help you figure out your treatment options based on how much melatonin your child took.
Melatonin For Insomnia In Dogs

Canine insomnia is a problem that can change your dogs personality. According to Dr. JoAnna Pendergrass, DVM, dogs with sleep disorders might whine, cry, or frequently wake up during the night, become more sluggish during the day or seem more disoriented when performing normal tasks.
Melatonin is not the major regulator of sleep patterns. However, its effects on the regulation of the sleep-wake cycle are profound.
The role of melatonin in the regulation of sleep has made it useful in treating sleep disorders. This action is well documented in humans however, more studies are still being done in animals. When administered to your dog, melatonin will cause decreased activity, decreased body temperature and eventually induce fatigue. In this regard, an appropriate dose of melatonin may be used to induce sleep in a dog suffering from sleeping disorders.
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Melatonin: Benefits Uses Side Effects And Dosage
Melatonin is a common dietary supplement that has gained widespread popularity around the globe.
Though renowned as a natural sleep aid, it also has powerful effects on other aspects of your health.
This article reviews the benefits and potential side effects of melatonin, as well as its best dosage.
Its primarily responsible for regulating your bodys circadian rhythm to manage your natural sleep cycle .
Therefore, its often used as a sleep aid to combat issues like insomnia.
Its widely available in the US as an over-the-counter medication but requires a prescription in other parts of the world, such as Europe and Australia.
In addition to improving sleep, melatonin is also involved in managing immune function, blood pressure and cortisol levels .
Plus, it acts as an antioxidant, with some research finding that it can significantly affect many health conditions.
In fact, studies show that melatonin may improve eye health, reduce symptoms of seasonal depression and even provide relief from acid reflux .
Summary
Melatonin is a hormone responsible for regulating your bodys sleep cycle. Its also associated with other health benefits.
Should Lower Doses Of Melatonin Be Used For Older Adults
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Studies have shown that exposure to supra-physiological plasma concentrations can lead to melatonin receptor desensitization.3,4 The range of maximally effective doses of exogenous melatonin was determined when the Massachusetts Institute of Technology first patented the medication. Since then, higher doses of up to 10 mg have been made available on the market. Although recent evidence suggests that doses greater than 6 mg of melatonin provide little benefit, additional research is required to determine the specific doses of melatonin that may be supra-therapeutic and subsequently interfere with the natural sleep-wake cycle or worsen insomnia from receptor desensitization.4 Appropriate monitoring and recommendations should be made to limit the dose being used on a regular basis in elderly people.3,4
References
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What Is The Take Home Should My Child Take Melatonin
I have not met a parent who is eager to medicate their child. Such decisions are made with a lot of soul-searching, and frequently after unsuccessful attempts to address sleep problems via behavioral changes. Treatment options are limited. There are no FDA-approved insomnia medications for children except for chloral hydrate which is no longer available. Personally, I use melatonin for children commonly in my practice. It is very helpful for some children and families. I appreciate Dr. Kennaways concerns but I have seen first hand the consequences of poor sleep on children and families. I always investigate to make sure that I am not missing other causes of insomnia . My end goal is always to help a child sleep with a minimum of medications. I know that this is the goal of parents as well. Some children, especially those with autism of developmental issues, will not be able to sleep without medication. So, melatonin may be a good option for your child if:
- Behavioral changes alone have been ineffective
- Other medical causes of insomnia have been ruled out
- Your physician thinks that melatonin is a safe option for your child and is willing to follow his or her insomnia over time
By the way, heres a great article from the Chicago Tribune on alternatives to melatonin.
NOTE:
How And When To Take It
The dose will vary depending on why you’re taking it. Follow the instructions that come with your medicine if you’re taking melatonin to:
- prevent headaches
If your child is prescribed melatonin, follow the doctor’s instructions carefully. Find out more about giving melatonin to children from Medicines for Children.
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What Is Melatonin What Does Melatonin Do
Melatonin is a hormone which is naturally produced by the pineal gland in your brain. It is both a chronobiotic agent, meaning that it regulates your circadian or body clock and a hypnotic, meaning that at higher doses it may induce sleep. Melatonin is usually used for its hypnotic effect, but it does not have this effect in everyone. Only the chronobiotic effect occurs in all individuals.The natural rise of melatonin levels in the body 1-3 hours before sleep onset is known as the dim light melatonin onset . This is the signal involved in body clock scheduling of sleep and corresponds to the end of the wakefulness signal produced by the circadian system. Children with insomnia may be given melatonin after their scheduled bedtime passes what this means is that their bodies are not yet ready for sleep. This is one reason why bedtime fading can be so effective for some children. The doses used clinically greatly exceed the amount secreted in the body.
There are a few things to be aware of:
Heres a short video I put together to explain how when you give the melatonin dose really matters. .
How Can You Get Help For A Melatonin Overdose
If you think youâve overdosed from melatonin or are having an allergic reaction to the supplement, call your doctor, 911, or poison control right away. While itâs rare to have issues with melatonin supplements, itâs better to be cautious if you notice strange side effects from the sleep aid.
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Sleep Disorders In Children
Melatonin can help children who find it difficult to fall asleep or sleep through the night. The supplement helps children to fall asleep more quickly and increases their sleep time.
Children with autism and Aspergers syndrome often suffer from sleep disorders. Many children with these conditions report not being able to fall asleep at night or sleep through the night.
What To Use Instead Of Melatonin For Kids

The safest approach for addressing sleep problems in children is to try non-pharmaceutical sleep strategies first. One study found that proper “sleep hygiene” is as effective as melatonin in half of children with sleep problems.
Sleep hygiene means having a bedroom environment and daily routines that promote good sleep. The most important part of good sleep hygiene for babies and kids is a consistent daily schedule, including set bedtimes and naptimes, wake-up times, and a nightly bedtime ritual.
Other things to try before sleep-aid supplements :
- A night light can help soothe any fears keeping your child awake. You might want to try a timed nightlight so that the light doesn’t stay on all night and possibly wake your child too early.
- Transitional objects, such as loveys, can help your child self-soothe at night. So can a pacifier.
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Berring-Uldum A et al 2018. Melatonin for children with insomnia. Ugeskr Laeger 180: V08170628. https://pubmed.ncbi.nlm.nih.gov/29761771/
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Chronic Sleep Onset Insomnia And Melatonin:
Problems with falling asleep are common in children, just like in adults. In children with chronic difficulty falling asleep within 30 minutes of an age-appropriate bedtime. Use of melatonin results in less difficulty with falling asleep, earlier time of sleep onset, and more sleep at night. The initial studies used pretty high doses, but later studies comparing different doses showed that dose didnt matter, and that the lowest dose studied was as effective as the highest. This is likely due to the fact that ALL these doses were well above the amount produced naturally in the children. Timing between 67 PM was more effective than later doses. The authors point out that a midafternoon dose would have the best effect but that afternoon dosing would have the unpleasant side effective of making children sleepy in the afternoon. .