<prompt> A 55yearold female who is taking propranolol for the management of a cardiovascular disease experiences an acute asthmatic attack. Which of the following drugs would you prescribe to attenuate this asthmatic attackCromolyn sodiumSalbutamolBeclomethasoneIpratropium bromide  <response>: Inhaled β2 agonists are the agents of choice for termination of acute attack of bronchial asthma. However, as the patient is receiving β-blockers, treatment with β2 agonists will be ineffective receptors are already blocked. Therefore, other bronchodilators like anticholinergic agents ipratropium or methylxanthines theophylline will be useful in such a case. 