Quviviq (daridorexant) is a prescription medicine used to treat insomnia by helping you fall asleep more easily and stay asleep throughout the night. Take it within 30 minutes of going to bed, ensuring you have enough time for a full night’s sleep. Common side effects include headache, dizziness, tiredness and daytime drowsiness. Avoid alcohol and driving if you feel sleepy the following morning, and take it exactly as prescribed.