Chronic insomnia

Melatonin

Evidence is not strong enough to recommend melatonin as a treatment for chronic insomnia.

limited evidence

Direction: unknown

Magnitude: unknown

Human evidence reviewed

Study context

Population: Adults with chronic insomnia

Studied dose: Varies or not established

Duration: Varies across reviewed studies

Last reviewed: 2026-09-16

Limitations & caveats

  • Short-term sleep-onset findings do not establish long-term benefit.

Sources

Melatonin: What You Need To KnowExpert or government fact sheet · NIH NCCIH · supportsOpen ↗

Source type and claim strength are separate. A fact sheet summarizes underlying research; its link is not an individual clinical trial.