Mirtazapine Tablets is a new type of antidepressant, which can selectively act on α2 receptors and 5-hydroxytryptamine receptors, antagonize α2 and 5-hydroxytryptamine, so as to play the efficacy and effect of anti-anxiety, antidepressant, anti-obsessive-compulsive and sedative. Mirtazapine tablets can effectively improve the patient’s depression and anxiety, in psychiatry is mainly used for the treatment of various types of depression, especially for severe insomnia patients with outstanding efficacy. Mirtazapine has no obvious anticholinergic effect, so the symptoms of dry mouth and constipation seldom occur, and it has little effect on male sexual function. Mirtazapine tablets are prescription medications, and common side effects are appetite and weight gain, as well as dizziness and drowsiness in the acute phase. Due to the different specific conditions of individuals, it is difficult to guarantee the effect after taking it. Therefore, the drug must be used under the guidance of a doctor and should not be stopped suddenly. Regular follow-ups should be made during use, and appropriate adjustments should be made in a timely manner according to changes in efficacy and adverse reactions after treatment.