Psychopharmacology is demarcated as a scientific study that deals with the influence of medicines have on mood, perception, discerning, and activities. Psychopharmacology is differentiated from Neuropsychopharmacology that highlights the relationship between drug made changes within the working. Psychoactive drugs relate mainly with specific receptors or target sites found in the nervous system to persuade a pervasive change of cells within the nervous system and alters the consciousness and behavioural changes in psychological or physiological functions.