The focus of this essay will be on the term ‘pharmacology’. Pharmacology refers basically to the branch of science, which deals with the study of medicines, focusing on the origin, chemical composition and therapeutic impact (The American heritage, 2004). More specifically, Pharmacology is the study of interaction between drugs and living beings (Hollinger, 2003). The word pharmacology has a Greek origin. According to Bukert (1985), in Greek religion, ‘Pharmakos’ referred to a human scapegoat. Whenever there was disaster or crises, the Greeks offered sacrifice of a human, as means of purification or purging the society. This act was religious, conducted as part of the Greek religion, to serve the purpose of societal catharsis. The ancient Greeks actually maintained outcasts at public expense to serve as human scapegoats when needed. Their underlying belief was that sacrificing these scapegoats would purify the society of evil and the gods will be pleased. The term ‘Pharmakos’ then underwent a lot of evolution overtime. At first the word became ‘Pharmakeus’ meaning a spell giving potion or poisoner. Another development in the term was into the word ‘Phamakon’ meaning purging, purifying or remedial intervention. From this, the term Pharmacology evolved (Hollinger, 2003).