Sleep Satisfaction and Psychomotor Performance of Adults

Inclusion criteria: * Patients consulting Psychiatrists (private or hospital) -whatever the reason for consulting- who present with chronic primary insomnia from the DSM IV (Diagnostic and Statistical Manual - Revision 4). * Accepting to participate in the study and signing informed consent Exclusion criteria: * Pregnancy or breastfeeding. * Current severe neuropsychiatric disorder (i.e. psychosis, obsessive compulsive disorder, major depression, dementia of Alzheimer or vascular type) according to DSM IV criteria. * History of substance abuse or dependence (including alcohol) within the past year. * Hypersensitivity to zolpidem or its excipients. * Severe hepatic insufficiency * Severe and/or acute respiratory insufficiency * Myasthenia gravis. * OTC (Over The Counter) sleep remedies or prescription sleep medications within 2 weeks or 5 half-life before screening. * Severe medical illness. The above information is not intended to contain all considerations relevant to a patient's potential participation in a clinical trial.