All are true EXCEPT: Azathioprine:

All are true EXCEPT: Azathioprine:

Isoniazid is a primary antitubercular agent that

This drug has activity against many strains of Pseudomonas aeruginosa. However, when it is used alone, resistance has emerged during the course of treatment. The drug should not be used in penicillin-allergic patients. Its activity against gram-negative rods is enhanced if it is given in combination with tazobactam

Clarithromycin and erythromycin have very similar spectrums of antimicrobial activity. The major advantage of clarithromycin is that

All of the following factors may increase the risk of nephrotoxicity from gentamicin therapy except