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👉📖 READY TO ACE YOUR EXAM? 📚 GET STUDY NOTES ON PATREON! •   / speedpharmacology   • Antihistamines are drugs that block the action of histamine. They are commonly used for the relief of allergy symptoms or for gastrointestinal conditions. This pharmacology lecture covers topics such as pathophysiology of allergic reaction, histamine and its actions, H1 and H2 histamine receptors, mast cells, parietal cells, mechanism of action of H1 and H2 antagonists. Drugs mentioned include first generation antihistamines; Brompheniramine, Chlorpheniramine, Clemastine, Cyproheptadine, Diphenhydramine, Doxylamine, Hydroxyzine, Meclizine, Promethazine; Second generation antihistamines; Cetirizine, Desloratadine, Fexofenadine, Levocetirizine, Loratadine, Azelastine, Olopatadine, Ketotifen; H2 blockers; Cimetidine, Famotidine, Nizatidine, and Ranitidine. • Thanks for watching and don't forget to SUBSCRIBE, hit the LIKE button👍 and click the BELL button🔔 for future notifications!!! • 0:00 Pathophysiology of allergic reaction • 2:00 Histamine receptors • 3:41 H1 receptor blockers • 7:14 H2 receptor blockers

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