NUR MISC (NURMISC)

NUR MISC EXAM 3 CH. 36 Antihistamines, Decongestants, Antitussives, & Expectorants Antihistamines • Drugs that directly compete with histamine for specific receptor sites • Two histamine receptors o H1 (histamine1): smooth muscle contraction and capillaries o H2 (histamine2): GI and HR acceleration • H1 antagonists (H1 Blockers  antihistamines o Examples: chlorpheniramine, fexofenadine (Allegra), loratadine (Claritin), cetirizine, diphenhydramine (Benadryl) • Antihistamine Properties...