insomnia
"I go right to sleep upon getting in bed about 11:00 PM but without any sleep aid I usually awake around 3:00 AM - 4:00 AM.  For the past five years I usually take a half of a 25mg doxylamine succinate tablet before going to bed and that keeps me asleep until shortly before the 6:00 AM alarm goes off.  No side effects.  Solid sleep.  Worth its weight in gold!"