Nicotine also binds 42, a high-affinity receptor along GABA neurons, which, with chronic nicotine use, become desensitized, therefore dampening the inhibition on dopaminergic transmission from the VTA to the NAc, while 7, low-affinity nAChRs on glutamatergic neurons are less prone to desensitization, therefore continue to enhance dopamine transmission (94, 95)
Nortriptyline, which was evaluated in 6 trials, was the only antidepressant besides bupropion that was superior to placebo
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