View clinical trials related to Hepatitis B.
Filter by:Hepatitis B accounts for approximately 5000 deaths per year in the United States. Liver transplantation offers the only hope for patients who develop end-stage liver disease. Early results of liver transplantation for hepatitis B were poor with recurrence rate of 80% and 1-year survival of only 50%. Recent studies found that preventive therapy using hepatitis B immune globulin (HBIG) or antiviral medications such as lamivudine can reduce the recurrence rate to roughly 30% with accompanying improvement in survival. However, HBIG when given as intravenous infusion in high doses is very expensive, while long-term use of lamivudine is associated with drug resistance. Some studies found that preventive therapy using both HBIG and lamivudine may decrease recurrence rate to less than 10% but the dose and duration of HBIG needed when used in combination with lamivudine is not clear. Adefovir, a new antiviral medication, is effective against lamivudine resistant hepatitis B but its role in liver transplantation is uncertain because of the risk of kidney damage. Many studies showed that the risk of recurrent hepatitis B is related to the viral load before transplant. Thus, it may be possible to tailor the preventive therapy according to the risk. The aim of this study is to establish the most cost-effective preventive therapy for recurrent hepatitis B after liver transplantation.
This study is being conducted to compare the safety and effectiveness of the investigational medication, LdT (Telbivudine) with Lamivudine, a drug currently approved by the US, European and Asian Health Authorities for the treatment of hepatitis B infection. The results for patients taking LdT will be compared to results for patients taking Lamivudine.
The purpose of this clinical research study is to assess the safety and effectiveness of entecavir, when being added to lamivudine, in the treatment of adults with chronic hepatitis B infection who are co-infected with HIV.
The purpose of this study is to determine the safety and efficacy of Pegasys + placebo + lamivudine versus lamivudine alone in patients with lamivudine versus lamivudine alone in patients with hepatitis B antigen CHB.
The purpose of this clinical research study is to assess the safety and effectiveness of switching to entecavir compared to continued lamivudine in patients with chronic hepatitis B.
The purpose of this clinical research study is to assess the safety and effectiveness of entecavir, as compared to lamivudine, in the treatment of adults with chronic hepatitis B infection who are hepatitis B e antigen negative.
The purpose of this clinical research study is to assess the safety effectiveness of entecavir, as compared to lamivudine, in the treatment of adults with chronic hepatitis B infection who are hepatitis B e antigen positive.
The purpose of this study was to determine the safety and anti-hepatitis B virus (-HBV) activity of ACH-126,443 in comparison to lamivudine or placebo in treatment-naive adults with chronic hepatitis B infection.
Control of hepatitis B virus (HBV) infection can be difficult in HIV infected people who have taken the antiviral lamivudine (3TC). These people may have HBV that has become resistant to 3TC. Adefovir dipivoxil (ADV) has shown promising anti-HBV activity in clinical trials; tenofovir disoproxil fumarate (TDF) is used to treat HIV and may also be effective against HBV. The purpose of this study is to find out if adding ADV or TDF to a highly active antiretroviral therapy (HAART) regimen that includes 3TC has an effect on HBV infection in patients coinfected with HIV and HBV. The tolerability and safety of these drugs will be examined.
This study will evaluate the safety and effectiveness of lamivudine plus adefovir versus adefovir alone to treat chronic hepatitis B infection. The Food and Drug Administration has approved lamivudine for the treatment of hepatitis B. However, the drug is not effective in all patients, and many of those in whom it initially works develop resistance after 1 to 3 years. Adefovir is an experimental drug that inhibits replication of the hepatitis B virus (HBV). Adefovir used alone may be adequate to provide sustained suppression of the virus and improvement in liver disease. However combining two anti-viral agents may be superior to using one alone, similar to the strategy employed for the treatment of AIDS. This study will test whether the combination of lamivudine and adefovir is better than adefovir alone for the treatment of chronic hepatitis B. Patients 18 years of age and older, who have been infected with HBV for at least 6 months, may be eligible for this study. Candidates may not have received lamivudine treatment in the past 6 months or prior treatment with adefovir and must not be taking other anti-viral treatments for their hepatitis. They will have a blood test to confirm HBV infection. Participants will be admitted to the NIH Clinical Center for 2 to 3 days for a medical evaluation. One to 2 weeks after the evaluation, patients will be randomized to begin taking lamivudine and adefovir, or adefovir alone. Therapy will continue for at least 12 months. Follow-up clinic visits will be scheduled weekly for the first month, then every 4 to 8 weeks for the rest of the treatment period. Patients will be evaluated at the end of 1 year. Patients who have not improved with treatment will stop taking the treatment and will be evaluated in the clinic once every 4 weeks for another 6 months. Patients who show an improvement in their liver injury may continue taking lamivudine and adefovir or adefovir alone for 4 more years, as long as they continue to improve with the medication. Progress will be evaluated. If the test results show no continued improvement or are negative for hepatitis B antigens, therapy will be stopped. Patients who continue treatment for 5 years will be readmitted at year 4 for another medical evaluation to assess the effects of treatment at that time. After the 5 years all patients will stop therapy at and be followed with regular clinic visits for at least 6 months.