If you think you have insomnia go to the doctor, insomnia is not the same as, having trouble falling asleep. If you do not have any problems with your sleep cycles or circadian rythms your fine, don't use prescription medication for no reason. Most likely you only need to improve your sleep hygeine
http://www.sleepfoundation.org/article/a...ep-hygiene
http://www.sleepfoundation.org/article/a...ep-hygiene