1. A 33-year-old m an com plained to his physician that the drug he was taking m ade him feel tightness in his chest and throat soon after the injection. The m an, recently diagnosed w ith classic m...

1. A 33-year-old m an com plained to his physician that the drug he was taking m ade him feel tightness in his chest and throat soon after the injection. The m an, recently diagnosed w ith classic m igraine, had started a treatm ent that included the subcutaneous adm inistration of a drug to block an im pending acute attack. Which of the follow ing drugs m ost likely caused the patient’s sym ptom s? A. Ibuprofen B. Propranolol C. Sum atriptan D. Valproic acid E. Diphenhydram ine F. Aspirin 2. A 25-year-old m an su ering from hay fever started treatm ent w ith an over-the-counter antihistam ine preparation. Which of the follow ing statem ents best explains the m olecular m echanism of action of the prescribed drug to treat this patient’s hay fever? A. Reversible binding to H3 receptors B. Irreversible binding to H3 receptors C. Reversible binding to H2 receptors D. Irreversible binding to H2 receptors E. Reversible binding to H1 receptors F. Irreversible binding to H1 receptors