<prompt> All of the following drugs can precipitate acute attack of asthma except -PheylbutazoneNaproxenGlucocoicoidsAspirin  <response>: Ans. is c i.e., Glucocoicoids Drugs precipitating asthma o NSAIDs Heparin Heparin Nitrofurantoin beta-blockers Opioids Disulfiram Organophosphates Phenylbutazone, Naproxen and Aspirin are NSAIDS. 