Insomnia is a common sleep disorder characterized by night time and daytime symptoms. Night time symptoms include persistent difficulties falling and / or staying asleep. Daytime symptoms of insomnia can include fatigue, a diminished sense of well being, compromised functioning including difficulties with concentration and memory. The diagnosis is made when the symptoms persist for at least one month and insomnia is considered chronic if it persists for at least 6 months. Nearly one in 10 adults in the United States suffers from insomnia at some point in their lives. Medication and behavioral strategies can successfully treat insomnia, even in chronic cases. Sleep related breathing disorders can often present with insomnia and it is useful to rule this out in appropriate patients.