A psychiatric medication is a licensed psychoactive drug taken to exert an effect on the chemical makeup of the brain and nervous system. Thus, these medications are used to treat mental illnesses. Usually prescribed in psychiatric settings, these medications are typically made of synthetic chemical compounds.
Psychotropic medication: Any medication capable of affecting the mind, emotions, and behavior. Some medications such as lithium, which may be used to treat depression, are psychotropic. Also called a psychodynamic medication. From the Greek psycho-, the mind + trop, a turning = (capable of) turning the mind.