Factors associated with the transition from drug abuse to initiation of injection drug use

Drug injection carries with it many risks and therefore it is important tounderstand initiating factors of injection and its origins.Thus purpose of this study was identify of Factors associated with initiation ofinjection drug use among substance abusers. Study method was cross- sectional study. Research Statistics universe constitutes of all People suffering substance dependence disorder with pattern of injection usein Tehran and Hamedan citys. This study conducted among 216 individual with substance dependence disorder that selected from harm reduction centers in Tehran and Hamedan citys, The sampling selection method was simple random.The instruments used fordata collectionwas included: demographic information, patterns of drug use and initiation of injection scales. In this study age average of initiation into injection was 22/5 years, Factors associated with initiation ofdrug injection were, aquired more pleasure,easier use, faster effect of injection, ineffecting previous usemethod, curiosity, peer pressure, lack of availability of the drug, poverty, low quality drugs. Results this study indicated that initiation factors to drug injection is multifaceted (Psychological, Social, Economic and Environmental), Therefore, in injection problem interventionists should be considered all this factors for prevention, treatment and harm reduction.