NIH Consensus Statement on Methadone and Opioid Substitution Treatment

"Prolonged oral treatment with this medicine [methadone] diminishes and often eliminates opiate use, reduces transmission of many infections, including HIV and hepatitis B and C, and reduces criminal activity."

Source: 

Effective Medical Treatment of Opiate Addiction. NIH Consensus Statement 1997 Nov. 17-19; 15(6): 4.