[Insomnia].

Insomnia affects one adult on five, in France, and has severe consequences on daytime functioning. Using precise criteria, it is possible to differentiate insomnia from common sleep disorders. These criteria vary with age. Comorbid insomnia includes medical, psychological, circadian and toxic causes of insomnia which have to be eliminated to assess primary insomnia. In primary care a sleep focussed visit and a sleep log are helpful to confirm the diagnosis, appreciate the severity and evaluate the treatment. The treatment strategy is based on a step by step approach which has to be defined with the patient. The treatment is based on a combination of symptomatic hypnotics and psychological and behavioral treatments: stimulus control therapy, relaxation, sleep restriction, and cognitive-behavior therapies.