ArticleTrials2026
A pragmatic trial with an optimized dose of rifampicin and moxifloxacin for the treatment of drug-susceptible pulmonary tuberculosis: a study protocol for open-label, randomized phase III trial (OptiRiMoxTB).
Article in Trials, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT05575518 (A Pragmatic Trial With Optimized Dose of Rifampicin and Moxifloxacin for the Treatment of Drug Susceptible Pulmonary Tuberculosis), which is not on this map. Not yet cited in PubMed.
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A Pragmatic Trial With Optimized Dose of Rifampicin and Moxifloxacin for the Treatment of Drug Susceptible Pulmonary Tuberculosis
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21 authors.
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Abstract
backgroundCurrent combination antibiotic treatment for drug-susceptible tuberculosis (DS-TB) usually takes 6 months to complete. This long duration can compromise clinical outcomes. Although a 4-month regimen including an optimized dose of rifapentine plus moxifloxacin is non-inferior to standard therapy, rifapentine is hard to source globally and adoption of this regimen has been slow. This trial investigates the efficacy and safety of a 4-month DS-TB treatment including the more readily available rifamycin, rifampicin 35 mg/kg, with or without moxifloxacin 400 mg.
methodsThis multi-centre phase III randomized open-label clinical trial will be conducted across four African countries (Gabon, Malawi, Mozambique and Tanzania). A total of 414 newly diagnosed consenting adult participants will be block randomized, after stratification by chest radiograph cavitation, to two experimental and one control arm at a ratio of 1:1:1. The first experimental group will receive optimized dose rifampicin (35 mg/kg) with routine weight-banded doses of isoniazid, pyrazinamide, and ethambutol once daily for 4 months. The second experimental group will receive optimized dose rifampicin (35 mg/kg) and moxifloxacin 400 mg once daily alongside routine doses of isoniazid and pyrazinamide. The control group will receive 6-month standard of care therapy: rifampicin (10 mg/kg) plus weight-banded dose of isoniazid, pyrazinamide, and ethambutol for 2 months, followed by the same doses of rifampicin and isoniazid for 4 months. Participants will be followed until the allocation of efficacy (TB-free survival) and safety (proportion of severe adverse events) outcomes. Secondary outcomes will also include the evaluation of the Tuberculosis Molecular Bacterial Load Assay (TB-MBLA) for microbiological treatment monitoring. DISCUSSION: This study will evaluate whether 4-month duration multi-drug treatment including an optimized dose of rifampicin with or without moxifloxacin has non-inferior efficacy and safety outcomes compared to standard of care DS-TB therapy in Africa.
trial registrationClinicalTrials.gov NCT05575518. Registered on 10th October 2022.
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