Not true about aztreonam ?: (A) f3-lactarn, (B) Monobactarn, (C) Active against pseudomonas, (D) Shows cross reactivity with other penicillins
Answer is D. Ans. is 'd' i.e., Shows cross reactivity with other penicillins Aztreonam It belongs to monobactams group of 13-lactam antibiotics. It is active against gram negative organisms including pseudomonas, but has no activity against gram positive organisms or anaerobes fi-lactam antibiotic with aminoglycosides spectrum. It is the only fi-lactam antibiotic that lack cross-reactivity with other P-lactam antibiotics, permiting its used in patients allergic to penicillins or cephalosporins.