Taking mirtazapine can cure insomnia. The more common cause of insomnia is depression. Insomnia caused by depression, with difficulty falling asleep as the main manifestation, is also accompanied by early awakening and difficulty falling asleep after waking up, and perfecting depression-related scale assessment can help confirm the diagnosis. Patients with this type of insomnia are depressed, unhappy, and have a significant loss of interest and hope in life, and more serious patients have pessimistic and suicidal tendencies. Mirtazapine is an antidepressant that has the effect of rapid introduction of sleep and can be taken half an hour before bedtime to improve sleep while also being able to treat depression. It is different from general sleeping pills and has a longer course of use, recommended for at least 6 months.