Background and objectives: India is among the largest countries to implement the RNTCP. This program provides intermittent regimens to the patients. where doses of isoniazide and ethambutol are more as compare to the daily regimen. The present study was undertaken to explore the early detection of ethambutol toxicity in the patients registered under this program. https://www.chiggate.com/3m-speedglas-9002nc-welding-helmet-fashion/