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Streptomycin
This was the first drug introduced for the treatment of tuberculosis. It must be given by injection, as it is not absorbed through the intestines. This limits its long-term use. It is. bactericidal for extracellular (including cavity) tubercle bacilli through a direct action of inhibiting protein synthesis. It has been found valuable for out patient treatment in which it is given twice or thrice a week, along with two oral drugs prescribed daily. It is also useful durin…