Efficacy and Safety of 5 mg Sublingual Zolpidem vs 10mg Oral Zolpidem in the Induction and Maintenance of Sleep in Patients With Primary Insomnia

Inclusion Criteria: * Men or women aged between 20 and 64 years; * Diagnosis of primary insomnia according to criteria defined by DSM-IV; * Difficulty in maintaining sleep and waking up until 3 am; * Not having used any psychoactive drug in the last 30 days prior to their inclusion in the study; * Signature of IC. Exclusion Criteria: * Previous history of serious medical illness, neurological or psychiatric disorder; * Allergy or hypersensitivity to zolpidem; * Obstructive Sleep Apnea syndrome; * Polysomnography with apnea and hypopnea index \>10/hour or PLM \>15/h; * Other secondary sleep disorders; * History of substance abuse or dependence; * History of daily consumption of alcoholic beverages; * Pregnancy, lactation or refusal to use safe contraceptive methods during the study.