Seromycin is indicated in the treatment of active pulmonary and extrapulmonary tuberculosis (including renal disease) when the causative organisms are susceptible to this drug and when treatment with the primary medications (streptomycin, isoniazid, rifampin, and ethambutol) has proved inadequate. Like all antituberculosis drugs, Seromycin should be administered in conjunction with other effective chemotherapy and not as the sole therapeutic agent.

Seromycin may be effective in the treatment of acute urinary tract infections caused by susceptible strains of gram–positive and gram–negative bacteria, especially Enterobacter spp. and Escherichia coli. It is generally no more and is usually less effective than other antimicrobial agents in the treatment of urinary tract infections caused by bacteria other than mycobacteria. Use of Seromycin in these infections should be considered only when more conventional therapy has failed and when the organism has been demonstrated to be susceptible to the drug.^[1]

Adapted from the FDA Package Insert.