Objectives: According to an approach, addiction is a medical condition and considers people as patient, on the other hand, it is believed that addiction is a deviant behavior and an addicted is a deviator. The term of medicalization refers to a process by which non-medical problems and issues are defined as sickness or medical condition. This concept is often associated with the control of deviance and the ways in which deviant behaviors that were once defined as immoral, sinful or criminal have been given medical meaning. The main purpose of this paper is to find out the essence experiences of addicted people related to addiction as a deviant or as a medical condition. Method: The qualitative phenomenological approach is applied. By this method, the researchers seek to understand the concept of addiction as it is being experienced by the individuals. A purposeful sample of 9 male participants able to attend and respond to questions and admitted to the TC, (a health center, affiliated to the institution of Behzisty, for well-being addicted people in Isfahan - the second largest city in Iran) were recruited. Data was gathered by a means of an in-depth semi-structured interview with each partner separately. ‘The interview guide included demographic questions such as sex, age, marital status, geographical location, and medical history. The duration of interviews was between 30 to 70 minutes, all interviews were tape- recorded and were transcribed by researchers. The analysis of the data was used the phenomenological analytic method by Colaizzi including: a) all the subjects description were read to acquire a feeling for them b) it is attempted to return each protocol and extract significant statements related to term of addiction c) the meaning of each significant statement were spelled out by researchers, totally they were 124 codes (descriptive codes) d) in this stage, the formulated meanings were organized into clusters of themes, they were 35 codes (interpretative codes) e) the codes were integrated into an exhaustive description of the addiction, they were 7 codes (explanatory codes) f) the exhaustive description were formulated as a statement of identification of addiction, and g) the data by returning to some interviewees and asking about the finding were evaluated. However, the findings of the study are as follow. Findings: Three codes were identified as descriptive, interpretative and explanatory. Totally 124 descriptive codes were extracted, they were reduced to the 35 sub- descriptive codes, then 7 interpretative codes and finally 3 explanatory codes, They included ‘self-experience as patient’, ‘institutionally medicalized addiction’ and ‘socially criminalized addiction’. The explanatory code of self-experience as patient is extracted of two interpretative codes including ‘medical contexts of addiction and the medical symptoms of addiction’. The explanatory code of ‘institutionally medicalized addiction’ also is extracted of two interpretative codes including ‘medicalization of addiction care’ and ‘problems of addiction medical cares’. The explanatory code of ‘socially criminalized addiction’ also is extracted of two interpretative codes including ‘social functions of criminal approaches to addiction’ and ‘legally functions of criminal approaches to addiction’. Results: This study portrays that the community still looks at addiction as a criminal action, in this approach addiction is not quite medicalized and then it is not included any social benefit for addicted people. The addicted people may take benefits of medicalization of institutions which their main duties is related to addiction and additional behaviors. This study also shows that although in academic discussions and medical institutions addiction is considered as a medical problem and the addicted people believed themselves as patients the community tends to see addiction as a deviant behavior. In the other hand, there are divergences between community and institutions in definition of medicalization of addiction.