Do you understand that melatonin should be taken once a day at bedtime in your new time zone, only between 8 pm and 4 am, as this helps reset your body clock, and that it should not be used for more than five days? (Melatonin helps reset your body clock after travel. Taking it at bedtime in your new time zone helps it work properly, while using it at other times or for too long can interfere with your sleep.)