"Nortriptyline
Nortriptyline (Aventyl®) is tricyclic antidepressant that is also used to treat chronic fatigue, migraine and chronic pain (
193–
196). Its primary mode of action is to inhibit the reuptake of norepinephrine and, to a lesser extent, 5-HT. Nortriptyline also blocks muscarinic and 5-HT receptors. In a small, single-blind, placebo-washout study involving patients with severe tinnitus and major depression, nortriptyline significantly reduced depression and tinnitus loudness (10-dB reduction) (
197). In a double-blind, placebo-controlled, follow-up study involving subjects with severe tinnitus and severe depression or depressive symptoms, nortriptyline significantly reduced depression scores, tinnitus disability scores and tinnitus loudness (6.4-dB reduction) relative to placebo (
198). There was a significant correlation between the reduction in tinnitus disability scores and depression scores (
199). These results suggest that nortriptyline is effective in reducing tinnitus loudness and severity in severely depressed tinnitus patients, but has less benefit in nondepressed individuals."
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3136369/