central nervous system drug http://purl.bioontology.org/ontology/MESH/D002491 http://purl.bioontology.org/ontology/SNOMEDCT/372752008 http://purl.obolibrary.org/obo/NCIT_C78272 A class of drugs producing both physiological and psychological effects through a variety of mechanisms. They can be divided into "specific" agents, e.g., affecting an identifiable molecular mechanism unique to target cells bearing receptors for that agent, and "nonspecific" agents, those producing effects on different target cells and acting by diverse molecular mechanisms. Those with nonspecific mechanisms are generally further classed according to whether they produce behavioral depression or stimulation. Those with specific mechanisms are classed by locus of action or specific therapeutic use. agent affecting nervous system central nervous system agent central nervous system drugs drug