Mirtazapine functions as a hypnotic.
Mirtazapine is indicated for bodyweight gain in cats experiencing poor appetite and weight loss resulting from chronic medical conditions
 In contrast to the H1 receptor, mirtazapine has only low affinity for the muscarinic acetylcholine receptors, although anticholinergic side effects like dry mouth, constipation, and mydriasis are still sometimes seen in clinical practice

