It is easy to think of melatonin as a general sleeping pill. A better starting question is: “Am I trying to shift my sleep schedule, or am I dealing with repeated difficulty sleeping?” Those are different situations.
What is melatonin?
Melatonin is a hormone involved in the body's day-night timing. The body produces it as part of its normal sleep-wake rhythm. Supplements add melatonin from outside the body; in the United States, they are sold as dietary supplements.
The amount and timing can matter, so do not assume that a larger serving will work better. A clinician or pharmacist can help review a product in the context of your goal and other medicines.
Where the evidence is stronger and weaker
Sleep timing problems
Melatonin may help with some situations involving a shifted body clock, including jet lag and delayed sleep-wake phase disorder. The right approach depends on the situation.
Chronic insomnia
Evidence has not been strong enough to recommend melatonin as a general treatment for long-term insomnia. A clinician can discuss treatments with better support, such as CBT-I.
A claim about one condition does not establish a benefit for another. “Helps with jet lag” and “fixes waking at 2 a.m. every night” are different claims.
Safety questions worth asking
- What else do I take? Tell a clinician or pharmacist about prescription medicines, over-the-counter sleep aids, and other supplements.
- How do I feel the next day? Watch for drowsiness, headache, dizziness, or other unwanted effects.
- How long do I plan to use it? Information about long-term safety is more limited than information about short-term use.
- What does the label actually say? Check the serving size, amount, and any additional ingredients.
Product quality can vary. Research on some melatonin gummies found that measured contents differed from labels. Independent quality testing can help assess whether a product contains what it claims, but a seal does not prove it will solve a sleep problem.
If you keep needing a sleep aid
If difficulty falling or staying asleep repeats, affects your days, or comes with loud snoring, gasping, or significant sleepiness, seek an evaluation. A supplement may distract from an underlying condition.
Explore insomnia basics, how to evaluate sleep supplements, and when to ask for help.