This paper presents a discussion on the rationality of addiction using economic theories. Drug abuse is the dominant context for addict ion in this paper. However, it does not preclude a broader definition, encapsulating dependence on substances other than pharmacological agents; let it be nicotine , alcohol, coffee, chocolates or sex. The argument follows the progression in rationale from consumption to addiction to eventual remission. The economics of any behaviour, addiction-motivated or otherwise, distils down to the scarcity of means and our intuitions of opportunity costs involved in making a choice. The two concepts are interrelated. The process of decision-making weighs the benefit of each choice (its marginal utility) against its o...