Pharmacology is a part of medication and pharmaceutical sciences which is worried about the investigation of medication or prescription action,[1] where a medication can be comprehensively or barely characterized as any man-made, normal, or endogenous (from inside the body) particle which applies a biochemical or physiological impact on the cell, tissue, organ, or creature (once in a while the word pharmacon is utilized as a term to include these endogenous and exogenous bioactive species). All the more explicitly, it is the investigation of the collaborations that happen between a living life form and synthetics that influence ordinary or unusual biochemical capacity. Psychiatric pharmacology deals with study of the drugs which have effect on thinking, mood, sensation, behavior, and mostly includes all psychological and psychiatric aspect. The drugs which affects nervous system are known as psychoactive drugs. Psychoactive drugs interact with particular receptors or target sites found in the nervous system to induce widespread changes in physiological or psychological functions. Online Journals are scholarly and peer reviewed journals.