This document provides an overview of neuropharmacology. It begins by defining neuropharmacology as the study of how drugs affect cellular function in the nervous system and influence behavior. It then discusses neuropharmacological agents and divides them into central and peripheral nervous system drugs. The document outlines the main branches of neuropharmacology as molecular and behavioral. It provides a brief history of the field and discusses key developments. It also describes neurochemical interactions like synaptic transmission and how pharmacological agents can act at different levels of these processes. Finally, it gives examples of specific neurotransmitters and drugs related to neuropharmacology and behavioral neuropharmacology.