<unk> (topical) is an tricyclic antidepressant that is FDA approved for the treatment of moderate pruritus in adult patients with atopic dermatitis or lichen simplex chronicus.   Common adverse reactions include constipation, nausea, xerostomia, dizziness, somnolence, urinary retention, and upper respiratory infection.
Doxepin 
Carbinoxamine
Chlorpropamide
Metopimazine
Chlorphenoxamine
Methoxamine
Perazine
Bromazine