View clinical trials related to HIV Infections.
Filter by:The aim of this trial is to study the efavirenz-rifabutin interaction. Thus, this trial will enroll patients with HIV and tuberculosis co-infections who are receiving a rifabutin-based regimen and who plan to begin an antiretroviral regimen containing efavirenz dosed at 600 mg daily. Enrollment in TB Trials Consortium Study 23 is not a requirement for participation in this study. Primary Objective: To compare the pharmacokinetics of rifabutin at 600 mg twice a week in combination with efavirenz 600 mg daily to the pharmacokinetics of rifabutin 300 mg twice a week without efavirenz.
Primary Objective: To define the impact of nelfinavir (given at 1250mg bid as part of a combination antiretroviral regimen) on peak levels and area under the curve for rifabutin and the rifabutin metabolite, 25-O-desacetyl rifabutin when rifabutin is given at 300 mg bi-weekly as part of tuberculosis chemotherapy. Secondary Objectives: To compare the pharmacokinetics of nelfinavir given twice daily at 1250 mg bid with twice-weekly isoniazid and rifabutin to the pharmacokinetics of nelfinavir 1250 mg twice-daily in historical HIV-infected patients not receiving isoniazid and rifabutin. To evaluate the correlation between pharmacokinetic parameters of rifabutin and 25-O-desacetyl rifabutin and the occurrence of toxicity attributed to rifabutin in patients with HIV-related tuberculosis. To define detailed pharmacokinetics of isoniazid given at 15mg/kg or 900 mg in patients with HIV-related tuberculosis. To attempt to derive optimal sampling times for nelfinavir and rifabutin pharmacokinetic studies.
Primary objective: To determine the rate of confirmed treatment failure and relapse with an intermittent rifabutin-based regimen for the treatment of isoniazid and rifamycin-susceptible HIV-related tuberculosis (TB).
Primary Objectives: 1) To determine the proportion of patients with HIV-related tuberculosis who have abnormal pharmacokinetic parameters for isoniazid and rifabutin. Secondary Objectives: 1. To determine risk factors for abnormal pharmacokinetic parameters for isoniazid and rifabutin. 2. To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the occurrence of toxicity attributed to antituberculous therapy. 3. To evaluate the correlation between pharmacokinetic parameters of isoniazid and rifabutin and the efficacy of TB therapy. 4. To define and correlate phenotypic INH acetylator status with the results of genotypic acetylator data obtained in the parent trial.
The purpose of this study is to look at how 2 different anti-HIV drug treatments affect the liver. The use of anti-HIV drugs like the nucleoside reverse transcriptase inhibitors (NRTIs) may be linked to liver problems like fatty changes, scarring, abnormal liver function tests (LFTs), and lactic acidemia (an increase in lactic acid in the blood). Increased liver enzymes may mean liver damage. The way that the liver changes in people with abnormal LFTs and lactic acidemia is not completely understood.
This study will evaluate the safety and effectiveness of adefovir plus lamivudine for chronic hepatitis B infection in people with and without HIV infection. Lamuvidine, an FDA-approved treatment for hepatitis B infection, also works against HIV. In some patients, the hepatitis B virus (HBV) continues to reproduce despite lamivudine treatment. Adefovir is an experimental drug that inhibits HBV replication and may work against some strains of the virus that have become resistant to lamivudine. Patients 21 years of age or older with active hepatitis B infection despite treatment with lamivudine for at least 1 year may be eligible for this 48-week study. Patients both with or without HIV infection may participate. Candidates will be screened with a medical history, blood and urine tests, liver ultrasound exam, electrocardiogram (EKG) and chest X-ray. Participants will have a physical examination, review of their medical history, blood tests, and a 24-hour urine collection. They will be admitted to the hospital for a liver biopsy to determine if they can receive the study drug. For this procedure, the patient is given a sedative for relaxation. The skin over the biopsy is numbed with an anesthetic and the biopsy needle is passed rapidly into and out of the liver to collect a tissue specimen. Patients are monitored in the hospital overnight for possible complications. After discharge, they return home and begin taking the study medications. Patients will be randomized to two treatment groups. One group will take 10 milligrams/day of adefovir by mouth, and the other will take a placebo-a lookalike pill with no active ingredient. Both groups will also take 150 mg lamivudine by mouth and L-carnitine pills or liquid. Patients with HIV infection will continue to take antiretroviral therapy as well. Patients will be followed in the clinic at study weeks 2, 4, 8, 12, 16, 20, 24, 28, 32, 36, 40 and 44 for blood and urine tests to determine the safety of the drug and to evaluate the response to treatment. On week 48, a repeat 24-hour urine test and repeat liver biopsy will be done. At the end of the 48 weeks, patients may continue to receive adefovir for another 48 weeks and possibly longer. All those who participate in this extension phase will receive active adefovir, regardless of whether they had previously taken adefovir or placebo. All patients will have the option to enroll in a separate study to examine the levels of HBV (and levels of HIV in HIV-infected patients) in the blood immediately after starting treatment and to determine if these initial levels can predict later outcome. This involves seven additional visits, for which participants will be compensated. At these visits, blood will be drawn on study days 0 (before starting drug treatment), 1, 3, 5, 7, 10 and 21 for HIV and HBV viral loads and specialized immunology tests.
This study will evaluate T-20 in children.
The purpose of this study is to set up a system for doing research on HIV prevention in various parts of the world. In order to plan large, long-term studies on the prevention of HIV in different areas of the world, it is necessary to get certain information first. It is important to know about the rate of HIV infection and how to get people to enroll for any future studies. This study will be done at 4 study locations.
The purpose of this study is to see whether or not an HIV vaccination will help the body control the amount of HIV virus in blood (viral load) in patients who are not taking anti-HIV medicines. Doctors are not sure why the body fails to control HIV viral load in most people infected with HIV. The vaccine Remune has been shown to boost part of the body's immune response to HIV in patients whose viral load has been lowered with anti-HIV drugs. This study will test the ability of Remune to improve the body's immune response and to lower HIV viral load in patients who stop taking anti-HIV drugs for short periods of time.
The purpose of this study is to see if antibiotic drugs given to treat an infection of the uterus during pregnancy can reduce the chances of HIV being passed from an HIV-positive mother to her baby. A link between bacterial disease of the vagina, premature birth, infection of the uterus during pregnancy, and the passing of HIV from a mother to her baby has been found. Early treatment of these problems may reduce the risk of passing HIV from an HIV-positive mother to her baby. [Note: As of 02/21/03, enrollment into this study was halted because preliminary data showed that the study antibiotics were not effective in preventing mother-to-child HIV transmission.]