Use of methadone take-home contingencies with persistent opiate and cocaine abusers

This study investigated conditions under which methadone patients with urin alysis evidence of persistent multiple drug abuse would respond to take-hom e incentive procedures. Study subjects submitted greater than or equal to 8 0% opiate and/or cocaine positive urines during a 5-week baseline period (M , W, F urine testing) while maintained on 60 mg methadone. Doses were raise d to 80-100 mg methadone under blind conditions and subjects were randomly assigned to receive methadone take-home doses under one of three conditions : (a) earn a I-day take-home privilege for each opiate and cocaine-free tes t delivered (daily contingent condition), (b) three negative test results r equired for the first take-home privilege, with each subsequent negative te st earning one take-home dose; a positive test reset the contingency back t o three again (weekly contingent condition), or (c) a control group that di d not receive take-home privileges (no take-home control). Five of 21 subje cts (24%) assigned to a contingent take-home intervention (2 from condition a, 3 from condition b) showed marked reductions in drug use and delivered 4 or more consecutive weeks of drug-free urines during a 16-week interventi on. No subject in the control group met these criteria. Percent positive ur ines decreased by 14% and 18% from baseline in daily, and weekly contingenc y groups, respectively compared to a decline of 2% in the no take-home cont rol group (planned contrast of means p < .07 and .05, respectively). Thus, the study demonstrated that rake-home incentives can be effective for reduc ing during-treatment use of opiates and cocaine in methadone patients with a poor prognosis related to their persistent multiple drug use. (C) 1998 El sevier Science Inc.