Nortriptyline is a tricyclic antidepressant (TCA), that, serves a serotonin-noradrenaline reuptake inhibitor (SNRI) that is 4 fold selective for noradrenaline reuptake inhibition over serotonin. Compared to other TCAs, it produces less prominent antihistamine (i.e., sedating) and anticholinergic side effects (i.e. constipation, dry mouth, dizziness, etc.). It is also used to treat bed-wetting, depression, chronic pain and ADHD (albeit rarely). It also appears to double quit rates.