Long-acting melatonin is for those who have trouble waking up at night. Melatonin is absorbed in equal amounts within 4 hours and ensures sleep for 6-8 hours. Shortens the time it takes to fall asleep (beneficial effect occurs when 1.9 mg of melatonin is consumed just before bedtime) and alleviates subjective complaints of jet lag fatigue (beneficial effect is achieved with a minimum dose of 0.5 mg taken at bedtime on the first day of travel and on the following few days) after arriving at the destination).