Distinct pharmacologic mechanisms allow the antidepressants to be separated into seven different classes. These basic pharmacologic concepts can explain not only the therapeutic actions, but also the side effects of the wide range of antidepressants currently available.

A discussion of psychopharmacology and the human condition, by Bruce G. Charlton of the Department of Psychology, University of Newcastle upon Tyne (United Kingdom).

Links to psychopharmacology resources of various types.