If you are found to have a medical problem, a mental health problem or a sleep disorder (such as sleep apnea), then specific treatment is important. Medications are available to treat narcolepsy and restless legs syndrome. Special masks can be used to help patients with sleep apneas breathe better.>

Your doctor may prescribe medication for short term or occasional use. Today there are a wide variety of medications to choose from. Some act quickly and are most helpful if you have trouble falling asleep. Others have a longer duration of action when the problem is staying asleep. Many of the medications are available as generics, which tend to be much less expensive. Older people should avoid the longer acting drugs because the sedation can last much longer than eight or nine hours.
References :
http://insomniaoverview.com/

Good luck!
References :
Experience