seven clinically used tricyclic antidepressant drugs ( imipramine , desipramine , chlorimipramine , protriptyline , nortriptyline , amitriptyline and doxepin ) , two atypical antidepressants ( iprindole and mianserin ) and a monoamine oxidase inhibitor ( tranylcypromine ) dose-dependently reduced response rate and increased reinforcement rate .
C0028420
nortriptyline
C0002600
amitriptyline