this summer i went on a very long plane ride to new zealand so i asked my friend who is very knowledgable on drugs, what legal drugs i could take to sleep through the whole plane ride. he said most ppl just take benadryl,dramamine,tylenol pm...but he also said i could use melatonin, i didnt kno wat it was so he explained it like this...melatonin is the chemical your brain makes to tell you to goto sleep, if you give urself melatonin it should tell your body to go2 sleep...he said it is usually used wen some1 is switching time zones and needs to adjust quickly