Melatonin Dosage

Key Takeaways

• Melatonin dosage varies by individual, but most adults benefit from 0.5 to 5 milligrams taken before bedtime.
• Starting with a lower dose and adjusting as needed can help minimize side effects.
• Timing matters. Melatonin is typically most effective when taken 30 to 60 minutes before sleep.
• While generally safe for short-term use, it’s best to consult a healthcare provider for long-term use or higher doses.

How Much Melatonin Should You Take?

Melatonin isn't classed as a drug by the U.S. Food and Drug Administration (FDA), so there are no official dosing recommendations. More research is needed to determine the optimal melatonin dose for different age groups and health conditions. However, initial studies have revealed some patterns.

Melatonin Dosage for Adults

For adults, melatonin doses between 0.3 milligrams and 12 milligrams have been used to treat a variety of sleep issues. Doses of melatonin between 1 milligram and 6 milligrams may be sufficient for improving sleep in older adults.

Both adults and older adults should try starting with the lowest possible amount of melatonin and slowly increasing as needed while being mindful of side effects. Most experts recommend limiting melatonin to short-term use.

Melatonin Dosage for Those Who Are Pregnant or Breastfeeding

There isn't enough information available on the side effects of melatonin supplements to determine if pregnant or breastfeeding people can safely take these supplements. Those who are pregnant or trying to become pregnant should avoid melatonin supplements unless directed by their physician. If you're struggling with sleep, ask your doctor for other ways to improve sleep during pregnancy.

Melatonin Dosage for Children

Melatonin may be safe to use short-term for most children and adolescents, but you should always talk to your pediatrician before giving your child melatonin for the first time. Dosage may range from 0.5 milligram to 3 milligrams taken up to an hour before bedtime, depending on the age of the child or teen. Children with certain health conditions may benefit from taking up to 10 milligrams of melatonin for sleep, under the guidance of a doctor.

Ultimately, more research needs to be done to ensure whether the benefits of melatonin for children outweigh the potential risks. There are concerns that melatonin might interfere with puberty.

One review found that while melatonin may help children fall asleep faster, it doesn't necessarily increase their total sleep time. The authors of this research review also point out that 50% of children experience better sleep with simple improvements in sleep habits.

Because melatonin supplements aren't strictly regulated by the FDA, there may be variation between the label and the actual contents of melatonin supplements.

When Should You Take Melatonin?

Natural melatonin production in the body typically starts to increase one to two hours before bedtime. When taking melatonin to sleep better at night, most people find the best method is to take it within two hours of when they want to fall asleep.

People who are taking melatonin for shift work or jet lag must calculate the best time of day to take these supplements in order to regulate their unique sleep-wake cycle.

Ensure that you will be able to sleep long enough for the melatonin to wear off when you wake up, and avoid driving or using heavy machinery within four to five hours of taking melatonin supplements.

Can You Overdose on Melatonin?

Melatonin is generally considered safe for most people. However, it may result in unpleasant side effects especially at higher doses, when taken for longer periods of time, or when taken in combination with other drugs or medications. The most commonly reported side effects are mild and include:

• Headache
• Nausea
• Dizziness
• Sleepiness

When to Talk to Your Doctor

It's a good idea to talk to your doctor before starting any new over-the-counter sleep aids. They can help you establish the correct dosage and timing based on various factors such as your weight, age, and other health conditions or medications you are currently taking.

If you aren't sure why you are having trouble sleeping, they may also be able to diagnose an underlying sleep disorder or health condition and work out a treatment plan. Improving sleep hygiene habits may also lead to better sleep.

Frequently Asked Questions

Is it safe to take melatonin with alcohol?

Alcohol can disrupt your natural melatonin levels, so experts recommend against taking melatonin when drinking or when using other sleep medications.

There's limited evidence that melatonin might be helpful in recovering from alcohol use disorders due to the antioxidant effects of melatonin. However, more research needs to be done.

Is it OK to take melatonin every night?

Melatonin is generally considered safe for short-term use, and some people take it nightly without issues. However, long-term use isn’t as well studied, so it’s best to use the lowest effective dose and talk to a healthcare provider if you plan to take it regularly.

Does melatonin require a prescription?

In the United States, melatonin is available over the counter and doesn't require a prescription. However, regulations vary by country, and it’s still a good idea to check with a healthcare provider before starting it.

What happens if you take melatonin with caffeine?

Caffeine and melatonin have opposite effects: Caffeine promotes alertness, while melatonin promotes sleep. Taking them together may reduce melatonin’s effectiveness and make it harder to fall asleep, especially if caffeine is consumed later in the day.