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Ethambutol Clinical Trials

Evaluation of SQ109, High-dose Rifampicin, and Moxifloxacin in Adults With Smear-positive Pulmonary TB in a MAMS Design
This study is a multiple-arm, multiple-stage (MAMS), phase 2, open label, randomized, controlled clinical trial that will compare the efficacy and safety of four experimental four drug regimens with a standard control regimen in patients with smear positive, pulmonary [more...]  tuberculosis (TB). Patients will be randomly allocated to the control or one of the four experimental regimens in the ratio 2:1:1:1:1. Experimental regimens will be given for 12 weeks. Thereafter, participants in the experimental arms will receive continuation phase treatment for 14 weeks containing standard-dose rifampicin and isoniazid. All participants will receive 25 mg of vitamin B6 (pyridoxine) with every dose of INH to prevent INH‐related neuropathy. Interim analyses will be conducted during the trial for efficacy, with the aim of identifying experimental arms that perform below a pre‐specified efficacy threshold; these arms will then be stopped from further recruitment.
Status: Recruiting Start Date: April 2013 Completion Date: December 2014
Rifampin-Based Tuberculosis Treatment Versus Rifabutin-Based Tuberculosis Treatment in HIV
There is a rapidly-growing need to identify evidence-based, safe, and effective co-treatment regimens for HIV-related tuberculosis (TB) among patients who require protease inhibitor-based antiretroviral therapy. This study will compare three alternative co-treatment options among participants in high TB [more...]  endemic resource-constrained settings, in which one co-treatment option explores if an additional anti-HIV drug needs to be used when patients are being treated with a protease inhibitor together with rifabutin-based anti-TB treatment. Accrual will take place in two accrual periods. Accrual period 1 will enroll 60 participants who will undergo an initial dose-finding period before continuing regular study follow-up. Once the review of the dose-finding pharmacokinetic and safety data from accrual period 1 participants is completed, accrual period 2 will begin.
Status: Recruiting Start Date: April 2013 Completion Date: October 2015
Early Bactericidal Activity (EBA) Study of Tuberculosis Regimens With and Without INH and Moxifloxacin
Tuberculosis (TB) disease is caused by bacteria that have infected the lung. TB bacteria are very small living agents that are spread by coughing and can be killed by taking TB drugs. To kill these TB bacteria TB patients have to take a combination [more...]  of four drugs for 2 months and then two drugs for a further 4 months. During the first 2 months patients take rifampicin, isoniazid, ethambutol, and pyrazinamide. After that patients take only isoniazid and rifampicin for a further 4 months, making a total of 6 months therapy. The investigators want to test a new combination of drugs to see if the investigators can treat TB faster in the future. By being in this study, you will not have a shorter course of anti-TB treatment; you must still take anti-TB medications for about 6 months. Studies in animals have suggested that one of the four drugs, isoniazid, only works for a few days and may not be needed after the first two doses of TB treatment to kill the TB bacteria. After that its effects wear off to the point that it may even interfere with the other drugs. The investigators want to see if stopping isoniazid early, or using moxifloxacin, a different drug, instead could treat TB faster. This study will be the first time that this type of regimen without isoniazid has been tested in humans. If the investigators can show that isoniazid stops working after a few days, the investigators could then try to see if they can possibly make a better tuberculosis treatment in the future.
Status: Not yet recruiting Start Date: June 2013 Completion Date: September 2014
Phase II Study of Amithiozone (Thiacetazone) for Patients With Mycobacterium Avium Complex Pulmonary Disease
OBJECTIVES: I. Determine the bacteriological activity of amithiozone against Mycobacterium avium complex (MAC) pulmonary disease. II. Define the ability of amithiozone to improve clinical outcomes in patients with MAC infection. III. [more...]  Determine the safety and tolerance of amithiozone with chronic dosing in these patients. IV. Assess the contribution of clarithromycin, streptomycin, rifampin, ethambutol, kanamycin, and amithiozone in the treatment of pulmonary MAC infection.
Status: Active, not recruiting Start Date: January 1991 Completion Date: 
Effect of Weight and/or Obesity on Ethambutol Drug Concentrations
This study is designed to measure drug concentrations in the blood of healthy volunteers administered a single dose of ethambutol. Our hypothesis is that volunteers with a body mass index (BMI) 25-40 kg/m2 will remove ethambutol more quickly from the blood than leaner [more...]  volunteers, and those with a BMI > 40 kg/m2 will have even greater clearance than those who are leaner.
Status: Completed Start Date: January 2010 Completion Date: December 2010
Tuberculosis Treatment Shortening Trial
Tuberculosis (TB) is a serious infection that can affect the lungs and other parts of the body. The usual way to treat TB is to take 4 medicines by mouth every day for 2 months, then take 2 of the same medicines for 4 [more...]  more months, for a total of 6 months. The purpose of this study is to see if taking 4 months of TB medicines is as effective in curing some TB patients as taking 6 months of TB medicines. Study participants will include 758 human immunodeficiency virus (HIV)-non-infected individuals, ages 18-60. Participants will be treated with 4 standard drugs called isoniazid, rifampicin, pyrazinamide and ethambutol. All individuals will take TB medicines for at least 4 months. After 4 months of treatment, if no TB germs are growing in sputum samples, participants will be assigned to either stop taking TB medicine (4 months of treatment) or to continue taking TB drugs for 2 more months (6 months of treatment). Participants will be involved in study procedures for up to 30 months.
Status: Completed Start Date: April 2002 Completion Date: November 2008
TBTC Study 24: Intermittent Treatment of TB With Isoniazid Resistance or Intolerance
This study is a prospective, open-label, nonrandomized trial using a largely-intermittent, six-month tuberculosis treatment regimen among patients who will not receive isoniazid due to the presence of initial isoniazid resistance or intolerance. Subjects are enrolled after resistance or [more...]  intolerance to isoniazid has been documented, and are treated for a total of six months (nine months if baseline chest x-ray shows cavitation and 2-month sputum culture is positive) with twice weekly or thrice weekly rifampin, ethambutol, and pyrazinamide.
Status: Completed Start Date: August 2000 Completion Date: December 2010


Clinical trials allow volunteers access to medical treatment options before they are available to the general public. Participants often receive the best healthcare available for their condition.

Risks are a reality, however, and may include more frequent doctor visits, health risks (possibly life-threatening), and/or the treatment being ineffective. Trials are federally regulated with strict guidelines to protect participants.

Ethambutol Clinical Trials Information presented on ClinicalTrialsSearch.org is not intended to be a substitute for qualified medical advice visit or treatment with a real physician. We are not physicians. Always consult with a medical doctor (MD). ClinicalTrialsSearch.org is a website dedicated to listing clinical research studies in human subjects, including those specifically related to Ethambutol. Clinical research trials and medical trials take place in hundreds of cities across the United States. A clinical trial or clinical study is a research project with human volunteer subjects. Clinical drug trials and pharmaceutical clinical trials generally measure the effectiveness of new treatments and drugs. The purpose of the studies is to answer specific human health questions. Clinical trials are a popular way for doctors, government agencies, and private sector companies to find treatments for all kinds of conditions. Clinical trials allow volunteers access to medical treatment options before they are available to the general public. Many times the participants receive treatment for free, and sometimes they are paid for their time. Participants often receive the best healthcare available possible for their condition. Risks are a reality, however, and may include more frequent doctor visits, health risks (possibly life-threatening), and/or the treatment being ineffective. U.S. - based Ethambutol studies are federally regulated with strict guidelines to protect patients.

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