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Critical issues in the treatment of hepatitis C virus infection in methadone maintenance patients
David M Novick1, Mary Jeanne Kreek
1Rockefeller University, New York, NY, USA. dnovick@digestivespecialists.com
Insights
Hepatitis C virus (HCV) infection is prevalent in patients undergoing methadone maintenance. Antiviral therapies show high sustained virological response (SVR) rates and excellent completion in these individuals.
Area of Science:
- Hepatology
- Infectious Diseases
- Addiction Medicine
Background:
- Hepatitis C virus (HCV) infection is a frequent complication of injection drug use.
- Methadone maintenance programs serve a significant population of HCV-infected individuals.
- Co-infection with human immunodeficiency virus (HIV) is common in this patient group.
Purpose of the Study:
- To review HCV infection in patients undergoing opioid maintenance therapy.
- To emphasize the medical care of HCV-monoinfected and HCV/HIV-coinfected patients on methadone or buprenorphine.
- To explore antiviral therapy and liver transplantation options for this population.
Main Methods:
- Literature searches were conducted using PubMed, PsycINFO, and SocINDEX.
- The search focused on papers from 1990 to the present.
- Key topics included antiviral therapy and liver transplantation in methadone maintenance patients.
Main Results:
- HCV antibody prevalence is high in injection drug users (53-96%) and methadone patients (67-96%).
- Antiviral therapy for HCV in methadone patients yields sustained virological response (SVR) rates of 28-94% with excellent completion rates (72-100%).
- Liver transplantation has shown success in methadone patients but is underutilized.
Conclusions:
- High-quality medical care for HCV is feasible for methadone maintenance patients.
- Evidence supports the effectiveness of comprehensive HCV services for this population.
- Despite evidence, most patients currently do not receive adequate HCV care.
Aims:
Hepatitis C virus (HCV) infection is a common chronic complication of injection drug use. Methadone maintenance programs contain large numbers of patients infected with HCV. This paper reviews HCV infection with emphasis on the medical care of HCV-infected, or HCV and human immunodeficiency virus co-infected, patients on methadone or buprenorphine maintenance.
Methods:
Literature searches using PubMed, PsycINFO and SocINDEX were used to identify papers from 1990-present on antiviral therapy for HCV in methadone maintenance patients and on liver transplantation in methadone maintenance patients.
Results:
Injection drug use is the most significant risk factor for HCV infection in most western countries. The prevalence of HCV antibody is high in injection drug users (53-96%) and in patients enrolled in methadone maintenance programs (67-96%). Studies of antiviral therapy for HCV in methadone maintenance patients show rates of sustained virological response (SVR), defined as negative HCV-RNA 24 weeks after the end of treatment, of 28-94%. In studies with contrast groups, no significant differences in SVR between methadone and contrast groups were found. Excellent completion rates of antiviral therapy (72-100%) were found in five of six studies. There are many barriers to methadone maintenance patients' receiving antiviral therapy, and research on overcoming barriers is discussed. Liver transplantation has been successful in methadone maintenance patients but has not been utilized widely.
Conclusion:
High quality medical care for all aspects of HCV infection can be provided to methadone maintenance patients. The literature supports the effectiveness of such services, but the reality is that most patients do not receive them.
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