"Access to sterile needles and syringes is an important, even vital, component of a comprehensive HIV prevention program for IDUs. The data on needle exchange in the United States are consistent with the conclusion that these programs do not encourage drug use and that needle exchanges can be effective in reducing HIV incidence. Other data show that NEPs help people stop drug use through referral to drug treatment programs. The studies outside of the United States are important for reminding us that unintended consequences can occur. While changes in needle prescription and possession laws and regulations have shown promise, the identification of organizational components that improve or hinder effectiveness of needle exchange and pharmacy-based access are needed."
Vlahov, David, PhD, and Benjamin Junge, MHSc, "The Role of Needle Exchange Programs in HIV Prevention," Public Health Reports, Volume 113, Supplement 1, June 1998, p. 79.