Biolab Zolpidem Orodispersible 1.0 mg, 1.75 mg and 3.5 mg to Treat Maintenance Insomnia Disorder.

Inclusion Criteria: 1. Men and women ≥ 18 years and ≤ 64 years of age 2. Participants willing and able to provide a written informed consent form, after an explanation of the nature of the study, and prior to any procedures related to the study. 3. Adults with clinical diagnosis of insomnia, as defined by the Diagnostic and Statistical Manual of Mental Disorders (DSM-V-TR) and who complain of difficulty in maintaining sleep, starting more than three months before the study initiation, and for three or more sleepless nights per week. 4. Participants with ability to understand and willingness to comply with the study procedures Exclusion Criteria: 1. History of Allergy or Hypersensitivity to Zolpidem; 2. All initial and secondary insomnia; 3. Basal polysomnography with apnea and hypopnea index\> 20 events / hour and PLM (Periodic Leg Movements)\> 15 events / hour. 4. Participants who used central nervous system medication or other medication known to interfere with the sleep / wake up cycle within 15 days prior to enrollment in the study, at the discretion of the study investigator. 5. Clinically significant diseases or surgeries, at the discretion of the principal investigator, within 30 days prior to study inclusion. 6. History of chemical dependence or alcohol abuse. 7. Any significant neurological and psychiatric disease or laboratory findings present, unless adequately controlled with medication allowed in the protocol. 8. Participants who received any investigational medication in the last 12 months prior to study inclusion. 9. Women who are pregnant or breastfeeding or who wish to become pregnant or who refuse to use safe contraceptive methods during the study. 10. Any disorder of the circadian cycle. 11. Regular night shift work within the last 2 weeks prior to study enrollment or expected to work in shifts during the study.