The efficacy of a voucher-based incentive program for improving adherence to outpatient, thrice weekly naltrexone maintenance was tested in a three group, randomized, 12-week clinical trial. Voucher incentives were given as follows: contingent group ( n =19) for each consecutive naltrexone dose ingested; non-contingent group ( n= 19) on unpredictable schedule independently of taking naltrexone; no-voucher group ( n= 20) none. Vouchers were exchangeable for goods and services. The contingent group had significantly longer treatment retention and ingested significantly more doses of naltrexone (consecutive and total) than either control group. Voucher incentives can significantly increase adherence to naltrexone maintenance in recently detoxified opioid dependent individuals.
Drug and Alcohol Dependence – Elsevier
Published: Apr 1, 1999
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