<prompt> If somebody develops resistance to INH, patient will develop simultaneously resistance to which drug?StreptomycinRifampicinEthambutolPyrazinamide  <response>: Ref: KD Tripathi, 7th ed. pg. 767 Rifampicin is considered as effective as isoniazid. This agent is active against slow and intermittently dividing bacterium spurters. If someone develops resistance to INH, they are most likely to develop resistance to rifampicin as well. In MDR-TB, there is resistance to INH and rifampicin. 