Melatonin is a natural brain hormone that is released at nightfall and causes sleep.The preparation shortens the sleep time. It is sufficient to take between 1mg to 5mg of melatonin before falling asleep.The added magnesium relaxes, vitamin B6 has a positive effect on the nervous system. Cautions: Do not drink alcohol while taking melatonin.It should not be driven after taking a car.The effect of melatonin capsules is felt 5 hours after ingestion.Pregnant and nursing mothers should consult with the doctor in a lower dose.