The purpose of this observational study is to evaluate the impact of daridorexant on quality of life, work productivity and insomnia symptoms in Canadian adults suffering from insomnia.

Participating physicians will identify potential participants based on their medical judgment for a new prescription of QUVIVIQ® (daridorexant) 50 mg. Physicians will discuss with the potential participant in person to briefly describe the study (purpose, confidentiality, questionnaires, as well as compensation). Potential participants interested in participating in the study will be asked to give their authorization to share with the PROxy Network their contact information by signing an authorization form. A designated PROxy team member will then contact the potential participant to explain the study in more details and to assess the eligibility. If the potential participant agrees to participate and provides verbal consent, he/she will be invited to visit the Participant Portal on the PROxy website to sign the ICF and complete the online baseline questionnaires.

Five days prior to each study timepoint (1 month, 2 months and 3 months following baseline questionnaire completion), participants will receive an email inviting them to fill their study questionnaires. This e-mail will be sent every other day to the participant who have not completed the questionnaires. In the case where a participant has not completed the questionnaires within a period of 5 days after the first email was sent, a call will be made by a designated PROxy team member to remind the patient to complete the questionnaire. Participants who don't complete the questionnaires in the 5 days following the call will be excluded from this timepoint analysis.

Inclusion Criteria:

• Signed ICF prior to any study-mandated procedure.
• Has received a first prescription of daridorexant 50 mg to treat insomnia, treatment start has not exceeded 7 days prior to enrollment.
• Ability to read and understand French or English.

Exclusion Criteria:

• Patients participating in a clinical trial.
• History of daridorexant use in the past (i.e., samples provided by the physician before prescription).
• Taking a concomitant medication to treat insomnia.
• Already started daridorexant more than 7 days prior to enrollment.The 7-day period is necessary to allow flexibility between the time of prescription and PROxy first contact to participant. Beyond this 7-day period, patients may already have experienced benefits from daridorexant. To minimize bias in baseline results, these patients will be excluded.

Eligible patients identified by 10 participating physicians in 4 provinces across Canada (Quebec, Ontario, Alberta, British Columbia)