Vitamins & Minerals

Melatonin for Kids with ADHD: Is It Safe? Does It Work?

Is melatonin safe for kids with ADHD who have trouble sleeping? The short answer is yes. Learn more about this hormone’s connection to ADD, why doctors recommend it as a healthy supplement for better sleep, and how to spot side effects right away.

Melatonin supplements and sleep mask on a blue background. Many parents wonder about melatonin for kids and whether it's safe to use.

Melatonin, Sleep, and ADHD

Melatonin is a hormone that is naturally produced in the brain in response to darkness. It helps our bodies maintain healthy sleep-wake cycles, where melatonin essentially tells the brain, “It’s time to start getting to sleep.”

The ADHD brain, however, has a delay in melatonin onset. Research shows that the onset of melatonin for most adults is roughly 9:30 pm, but in adults with ADHD it happens more than an hour later. In children with ADHD, the melatonin onset is similarly late — around 10:15 pm.1

This delay in melatonin onset is also associated with late sleep onset — the time it takes for children and adults with ADHD to fall asleep.  It typically takes a neurotypical person up to two hours to fall asleep after melatonin onset. In adults with ADHD, it may take three hours.2

Melatonin’s delayed onset helps to explain, in part, why people with ADHD often experience sleep problems. Research shows that 25 to 50 percent of people with ADHD have a sleep disorder3 4.

Taking melatonin as an ADHD supplement under the guidance of a pediatrician or primary care physician, therefore, can help children and adults with ADHD get to sleep safely and naturally.

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Is Melatonin Safe for Kids?

Short-term use of melatonin supplements appears to be safe for most people and effective in inducing sleep. According to one study, children with ADHD were able to sleep longer and fall asleep faster after taking melatonin daily combined with their ADHD medication over several weeks.5 Additionally, I have young patients who take melatonin on a daily basis, and I’ve also worked with kids and teenagers who take it regularly. Their doctors and pediatricians agree that it’s safe.

But data on the long-term safety of taking melatonin supplements is lacking, according to the National Center for Complementary and Integrative Health (NCCIH).6 There’s also not enough information yet about possible side effects, especially when taking doses higher than what the body normally produces. That’s why it is strongly recommended that parents of children with ADHD or adults with ADHD talk to their doctors about melatonin use, because it’s not one-size-fits-all. Overall, future research will continue to shed light on melatonin use, and it is important to be as up to date with the data as possible.

How Much Melatonin Can I Give My Child?

Melatonin usually comes in 3 mg or 5 mg tablets. Five milligrams is considered a relatively high dose for a young person — most children take a 3 mg or even a 1 mg dose.

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In a study on melatonin for kids with ADHD, sleep onset advanced by 27 to 48 minutes with melatonin, and sleep duration increased by as much as 62 minutes.7 The children, between 6 and 12 years old, were given either a 3 mg or 6 mg dose of melatonin depending on their weight.

What Are the Negative Effects of Melatonin? Are There Any Side Effects?

Studies have not shown any danger with melatonin, including any risk of dependency. That said, some patients may experience reactions to melatonin, which may depend on the dose. The higher the dose, the greater the likelihood of experiencing any side effects. Possible melatonin supplement side effects reported in children have typically been mild, according to NCCIH 8, and include:

  1. Drowsiness
  2. Increased bedwetting or urination at night
  3. Headaches
  4. Dizziness
  5. Agitation

When Should Melatonin Be Taken?

The best time to take melatonin is 90 to 120 minutes before you plan on going to bed. This allows the body to metabolize the melatonin and eventually set off the OK-we’re-now-going-to-sleep signals in your brain. Melatonin for kids or adults shouldn’t be administered as a “direct” sleep aid right at bedtime, which is one of the biggest misconceptions surrounding melatonin use.

If somebody with sleep difficulties is reporting that they’re sleeping better when taking melatonin right before bed, that’s probably not what’s getting them to sleep, since a two-hour window is generally needed for melatonin to work effectively. What may be happening is a type of placebo effect, where the thought of a sleep aid alone can feel really good and have a reinforcing effect. It can make the person feel calm, which may help them fall asleep.

The information in this article is based on Dr. Roberto Olivardia’s “Time for Bed! Sleep Solutions for the ADHD Brain” webinar, which was broadcast live on September 25, 2019. Dr. Olivardia is a member of ADDitude’s ADHD Medical Review Panel.

Melatonin for Kids: Next Steps

View Article Sources

1Kooij, S. (2016, November 7). Are You a Night Owl? About ADHD and Late Sleep. Retrieved from:

2 Bijlenga, D. , Van Someren, E. J., Gruber, R. , Bron, T. I., Kruithof, I. F., Spanbroek, E. C. and Kooij, J. J. (2013), Body temperature, activity and melatonin profiles in adults with attention‐deficit/hyperactivity disorder and delayed sleep: a case–control study. J Sleep Res, 22: 607-616. doi:10.1111/jsr.12075. Retrieved from: 

3 Corkum P, Davidson F, Macpherson M. A framework for the assessment and treatment of sleep problems in children with attention-deficit/hyperactivity disorder. Pediatr Clin North Am. 2011;58:667–683. Retrieved from:

4 Owens JA. Sleep disorders and attention-deficit/hyperactivity disorder. Curr Psychiatry Rep. 2008;10:439–444. Retrieved from:

5 Mohammadi, M. R., et. al.  (2012). Melatonin effects in methylphenidate treated children with attention deficit hyperactivity disorder: a randomized double blind clinical trial. Iranian Journal of Psychiatry, 7(2), 87–92. Retrieved from:

6 Melatonin: What You Need To Know. (2019, October). Retrieved from 

7 VAN der HEIJDEN, KRISTIAAN B. et al. Effect of Melatonin on Sleep, Behavior, and Cognition in ADHD and Chronic Sleep-Onset. Journal of the American Academy of Child & Adolescent Psychiatry, Volume 46, Issue 2, 233 – Retrieved from:

8 Melatonin: What You Need To Know. (2019, October). Retrieved from

2 Comments & Reviews

  1. I am a licensed mental health professional and have some young patients with ADHD and others on the Autism Spectrum (I still call these high level functioning AS kids Aspergers). We live in a fairly affluent community with A-rated public schools. The parents of these kids tell me that they get no assistance from teachers or school personnel with establishing reward systems-behavior-based; establishing an IEP for the kids who need extra time, who need to sit by the teacher (presented as a cool move instead of punishment. My newest 10 year old is made to sit at a table by himself in the “aftercare” program, with no books or school work. He is not permitted to talk to other students. Why? At times, he says he can’t keep his hands to himself or interrupts the school aids.

    The child had seen a school counselor for behavioral issues 3-4 times this school year. The mother has no idea what they talked about, whether she should punish him at home or are there consequences at school. No communication. Is this a common problem? Any suggestions for Mom?
    Thanks for letting me share.

  2. It sounds like you live in the US but I can share that the British private school (ie fee paying by parents not state funded) my daughters have attended is definitely not on the ball in the way a state school would be in terms of adaptation for different learning difficulties. At times my ADHD daughter has been punished or ridiculed for things that were ADHD related. We didn’t know at the time and have now pulled her out of school but looking back there is much that could be improved upon.

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