Melatonin & Kids: What Parents Should Know

Melatonin has become a fixture in many family medicine cabinets – and it’s easy to see why. It’s widely available and offers a natural solution to one of parenting’s most exhausting challenges: getting kids to sleep. But there are some cautions parents should keep in mind. Sally Ibrahim, MD, a sleep medicine specialist at University Hospitals Rainbow Babies & Children’s, breaks down what melatonin actually does, when it’s appropriate for children, and how to use it safely and effectively.

How Melatonin Works

Melatonin is a hormone produced naturally by the body to signal that it’s time to sleep. As a supplement, it works in two distinct ways.

“Melatonin has two properties,” explains Dr. Ibrahim. “One is a hypnotic property, helping you get to sleep. The other is more of a time-shifter. We call it a chronotropic, meaning it can reset the body’s internal clock.” This dual function makes it useful for two different types of sleep problems: difficulty falling asleep and a misaligned body clock that leaves a child wired at the wrong time of night.

Melatonin is considered relatively weak compared with other sleep aids. But that’s what makes it appropriate for children, when used as directed.

When Melatonin Is (and Isn’t) the Right Call

Dr. Ibrahim recommends melatonin as part of a parent’s toolbox of healthy sleep strategies. “The problem with melatonin is not melatonin itself – it’s misuse,” she says. “There's not a simple ‘yes’ or ‘no’ to whether you should give you child melatonin. It’s about how to use it properly.”

Melatonin works best as part of a broader sleep plan, not as a standalone fix, and Dr. Ibrahim says it’s important to use it under the guidance of a doctor. That’s because a sleep problem can be a sign of something else, such as a behavioral issue or a medical condition. A sleep specialist can evaluate your child and identify the right approach. For other sleep disorders, including sleep apnea, melatonin is not appropriate and using it in those situations can delay proper treatment.

Melatonin can be effective for children with:

• Sleep-onset insomnia, when a child has difficulty falling asleep at bedtime
• Circadian rhythm disruption, when a child’s internal clock is shifted, causing them to feel alert or sleepy at the wrong time. For many teens, that means being alert late at night and struggling to wake in the morning
• Short-term use alongside behavioral strategies, such as treating insomnia with cognitive behavioral therapy

“Research shows that if you combine a sleep aid such as melatonin with behavioral strategies, kids have better sleep outcomes in both the short and long term,” Dr. Ibrahim says.

Melatonin Dosing, Timing & Type

Melatonin occurs naturally in certain foods like tart cherries and walnuts, that doesn’t mean that synthetic melatonin should be taken without care. “People often think, if a supplement is good for you and a sleep aid can help, then more is better, but that’s not the case with melatonin," Dr. Ibrahim says.

Dr. Ibrahim emphasizes that melatonin dosing for children should be conservative and age appropriate. The International Pediatric Sleep Association recommends the following maximum doses, given approximately 30 minutes before bedtime:

• Toddlers (2 – 3 years): Up to 1 mg
• Preschool (4 – 5 years): Up to 2 mg
• School-age (6 – 10 years): Up to 3 mg
• Older school-age and adolescents: Up to 5 mg

For most children, starting at the lowest effective dose is always the right approach. Higher doses don’t work better or faster and can raise safety concerns. Higher doses have been studied in children with neurodevelopmental disorders (such as autism spectrum disorder), but only under close doctor supervision.

The formulation of the melatonin you choose matters, too. Immediate-release melatonin helps a child fall asleep, making it the right choice for a child who has trouble getting to sleep. Extended-release melatonin is designed to help a child stay asleep, to reduce nighttime awakenings. Some formulations combine both, which can be useful when a child struggles with falling and staying asleep.

Some children may use melatonin for just a few days, for example to adjust to jet lag when traveling. Others with chronic sleep disturbances may use it longer. “As a sleep specialist, I'm always asking when we can stop the sleep aid,” Dr. Ibrahim says. “You want to be on it as briefly as possible, with a clear goal in mind.”

What Are Melatonin’s Side Effects?

Recent headlines suggested a link between melatonin to heart failure, which worried many parents. Dr. Ibrahim says those reports need context. The finding came from an unpublished study that showed an association, not proof that melatonin caused heart failure. “That doesn’t mean that melatonin causes heart failure,” says Dr. Ibrahim. “In fact, many of the people in the study were also likely using melatonin for untreated sleep apnea, which is a known risk factor for heart disease.”

For most children, melatonin is well tolerated. But there are a few things parents should know when starting a child on it:

• Nightmares and night terrors are common potential side effects. “I like to warn parents about that, because it may be scary for a parent to witness a night terror,” she says. If it occurs on the first night, it may be coincidental. But if it happens again on another night with melatonin, then the melatonin usage may need reconsidering.
• Paradoxical alertness is extremely rare, but some children experience the opposite of the intended effect and become more awake rather than sleepy.
• Headaches and other minor symptoms are also rare but worth reporting to your child’s doctor if they occur after starting melatonin. As with any new medication, reporting side effects or changes in the child is an important measure of caution.

One more safety note for parents: Calls to poison control centers involving melatonin have increased in recent years, largely among young children who accessed gummy supplements which are sweet and appealing. It’s best to treat melatonin like any other medication: stored out of reach, out of sight and in a childproof container.

Healthy Sleep: The Foundation Melatonin Can’t Replace

Though melatonin can help support good sleep, Dr. Ibrahim wants parents to know that it can’t replace good sleep foundations. Behavioral strategies like consistent bedtime routines, a healthy sleep environment and helping children learn to fall asleep independently are the bedrock of healthy habits. When those foundations are strong, many children don’t need additional sleep aids. But when they’re not, melatonin alone won’t solve the problem.

For families dealing with persistent sleep challenges, working with the right specialists can identify factors in sleep disturbance and help families build a plan that addresses it at the root.

“Sleep problems in children affect the whole family,” says Dr. Ibrahim. “Getting the right guidance – whether that’s from a primary care physician, a sleep medicine specialist or a behavioral sleep psychologist – can make a real difference for everyone in the home.”

 

Related Links

The pediatric sleep medicine specialists at University Hospitals Rainbow Babies & Children’s treat a wide range of childhood sleep disorders, from the common to the complex.