^ Jump up to: a b c d e f Mattick RP; Digiusto E; Doran CM; O'Brien S; Shanahan M; Kimber J; Henderson N; Breen C; Shearer J; Gates J; Shakeshaft A; NEPOD Trial Investigators (2004). National Evaluation of Pharmacotherapies for Opioid Dependence (NEPOD): Report of Results and Recommendations (PDF). National Drug and Alcohol Research Centre, Sydney. Commonwealth of Australia. ISBN 978-0-642-82459-2. Monograph Series No. 52. Archived from the original (PDF) on 2011-03-09.
This is an ongoing debate in the medical community, but it is generally agreed that there is no one cause for the development of addiction. According to the National Institute on Drug Abuse, contributing factors may include a genetic predisposition to develop addictive tendencies, an environment that is permissive of drug abuse, access to illicit substances, and certain developmental issues. The existence of a Dual Diagnosis is one of the biggest risk factors for the development of addiction. Heroin Withdrawal | First Week In