"i take this about three times a week to help me sleep. i have had insomnia for two years.  even though i work 12-14 hours a day and jog 5 miles 4 times a week, i still could not sleep. started taking this and it did not do much at first.  but now it really works! i can sleep about 7 hours and only wake once or twice and can go back to sleep pretty quickly usually. i wish i could take it every night but doing this lessens its effect on me.  i save it for 3 nights a week and struggle through the others.  side effects are constipation, i never &#039;go&#039; the next day.  also, pretty bad rebound insomnia, i do not sleep well the night after i have taken it."