Melatonin Pura, spray is a dietary supplement with melatonin, intended for sleep. Melatonin contributes to reducing the time needed to fall asleep, and the beneficial effect is achieved by taking 1.0 mg of melatonin just before bedtime. Melatonin contributes to the relief of subjective complaints associated with changing time zones when traveling by plane, and a beneficial effect is achieved by taking 0.5 mg of melatonin immediately before going to bed on the first day of travel and for the next few days after arriving at the destination.