Sharing of contaminated injecting equipment has driven the HIV epidemic in Indonesia [6]. Sentinel surveillance among IDUs in drug treatment programs in Jakarta indicated a rise in HIV prevalence from near zero in 1995 to over 50% in 2002 [7]. In 2006, the Ministry of Health (MOH) estimated that the 220,000 IDUs living in Indonesia contributed for 63% of all HIV infections , including 55% acquired through injecting and 8% sexually transmitted by infected IDUs [8].