<prompt> A child suffering from asthma is to be treated with a drug that blocks the synthesis of leukotrienes. What drug would be an appropriate choiceCromolyn sodiumMontelukastZileutonTheophylline  <response>: zileuton mech of action:- It is a 5-LOXlipoxygenase inhibitor, blocks LTC4D4 as well as LTB4 synthesis. It therefore has the potential to prevent all LT induced responses including those exeed by activation of cysLT1 receptor. Duration of action of zileuton is sho. side effects:- Hepatotoxicity 