Melatonin tablets for jet lag are a form of the naturally occurring hormone melatonin, which helps regulate the body’s sleep–wake cycle. They are used to reduce the effects of jet lag, such as daytime tiredness, difficulty sleeping at night, and reduced alertness, especially after long flights crossing multiple time zones.

By supplementing melatonin, these tablets help signal to the body that it is time to sleep, aiding faster adjustment to a new time zone. They are typically taken close to the target bedtime at the destination and are intended for short-term use to support healthy sleep patterns during travel recovery.