TB-IRIS NSAID Cox-2 Inhibitor Prevention Trial

Overview

Background: Non-Steroid Anti-Inflammatory Drugs (NSAIDs) reduce pain and inflammation by inhibiting cyclooxygenase, an enzyme in the pathway for formation of prostaglandins and thromboxane. Prior studies have proven the role of ibuprofen (an NSAID) in modulating lung injury and decreasing pulmonary damage in cystic fibrosis. While there has been an intense effort by the scientific community to define the best treatment strategies for tuberculosis immune reconstitution inflammatory syndrome (TB-IRIS), to our knowledge there is no available study evaluating preventive strategies using anti-inflammatory agents for TB-IRIS, a highly morbid complication in HIV-infected TB patients initiating antiretroviral therapy (ART). Design and Methods: We propose to conduct a single center double-blind placebo-controlled randomized trial to investigate the efficacy of daily self-administered Meloxicam (a NSAID) versus placebo for prevention of Tuberculosis associated Immune Reconstitution Inflammatory Syndrome (TB-IRIS). A total of 150 HIV-infected adults who are treated for Tuberculosis for at least 2 weeks and about to initiate HIV treatment at Brewelskloof Hospital, Worcester, and Tygerberg Teaching Hospital, Cape Town, will be randomized to one of the following treatments: Meloxicam 7.5 mg tablet once-a-day, the experimental arm, versus Placebo tablet once-a-day, the control arm, for 8 weeks. All patients will be followed up for 12 months. Primary efficacy outcome: The decrease of the incidence of paradoxical TB IRIS by at least 20%; Primary safety outcome: The proportion of patients who temporarily or permanently discontinue Meloxicam due to any adverse event (e.g. dyspepsia or gastro-intestinal upset). Secondary outcomes are: 1) the proportion of patients in each arm with the following indicators of TB-IRIS severity/quality of life (QOL) (degree of pain or discomfort \>III, presence of local or disseminated suppuration/abscess of any site, unscheduled clinic visits, hospitalizations, missed more than a day at work, etc; 2) The incidence of other types of IRIS (e.g. Kaposi Sarcoma or cryptococcal meningitis). This study will provide important and novel data on the feasibility and efficacy of using a cheap, widely available NSAID used in both developed and developing countries, as a preventive intervention for TB-IRIS that could be quickly put into practice if proven to be effective