Stereochemical considerations of the actions of some psychotropic drugs.

Stereoisomers have been used as tools to investigate the role of spatial (3-dimensional) features in neurochemical and behavioral effects of psychotropic drugs. Studies using enantiomers (optical isomers), geometrical isomers and semi-rigid molecules have shown that spatial features play a role in effects of antidepressant, antipsychotic, antiparkinsonian, and antianxiety drugs, as well as stimulants and psychotomimetics. An understanding of the role of spatial features in effects of psychotropic drugs might aid in reducing their side effects and in enhancing their therapeutic efficacy.