1. Efficacy and safety of peginterferon alfa-2a/ribavirin in methadone maintenance patients: randomized comparison of direct observed therapy and self-administration.
- Author
-
Bonkovsky HL, Tice AD, Yapp RG, Bodenheimer HC Jr, Monto A, Rossi SJ, and Sulkowski MS
- Subjects
- Adult, Directly Observed Therapy, Female, Hepatitis C, Chronic complications, Humans, Interferon alpha-2, Male, Middle Aged, Prospective Studies, Recombinant Proteins, Self Administration, Substance Abuse, Intravenous complications, Substance Abuse, Intravenous drug therapy, Treatment Outcome, Antiviral Agents administration & dosage, Hepatitis C, Chronic drug therapy, Interferon-alpha administration & dosage, Methadone administration & dosage, Narcotics administration & dosage, Polyethylene Glycols administration & dosage, Ribavirin administration & dosage
- Abstract
Background: Adherence to chronic hepatitis C (CHC) treatment may be particularly challenging in methadone maintenance patients. We assessed the safety, tolerability, and efficacy of peginterferon alfa-2a/ribavirin treatment in methadone maintenance patients previously untreated for CHC., Methods: Patients were randomized 1:1 to direct observed therapy (DOT) or self-administration (SA) of peginterferon alfa-2a. DOT patients were seen weekly at methadone clinics; SA patients were seen less frequently, only at investigative sites. Genotype 1-infected patients were treated for 48 wk with peginterferon alfa-2a (180 microg/wk)/ribavirin (1,000/1,200 mg/day); genotypes 2- and 3-infected patients were treated for 24 wk with peginterferon alfa-2a (180 microg/wk)/ribavirin (800 mg/day)., Results: Based on defined efficacy stopping rules, 77% (37/48) completed their targeted length of treatment, and 44% (21/48) achieved sustained virologic response (SVR). Two DOT and 3 SA patients were withdrawn for safety reasons and 6 and 9, respectively, for nonsafety reasons. Over 60% and 50% of each group were >80% compliant with the planned cumulative doses of peginterferon alfa-2a and ribavirin, respectively, and over 60% with overall treatment duration. SVR rates were 54% (13/24) for DOT and 33% (8/24) for SA; 23% (3/13) and 38% (6/16), respectively, for genotype 1 and 91% (10/11) and 25% (2/8), respectively, for genotypes 2 and 3. Stepwise logistic regression analysis, showed that DOT (vs SA; OR 3.27, 95% CI 0.90-11.91, P = 0.073) and Caucasian race (vs Other; OR 13.31, 95% CI 1.42-124.71, P = 0.023) were predictors of SVR., Conclusion: Peginterferon alfa-2a/ribavirin can be used safely and successfully in CHC patients receiving methadone maintenance.
- Published
- 2008
- Full Text
- View/download PDF