Introduction to Antihistamines

The video tutorial explains allergies as immune responses to foreign substances, highlighting their prevalence and economic impact. It delves into histamine's role in the immune system, focusing on the H1 receptor's involvement in allergic reactions. Antihistamines are described as inverse agonists that alleviate symptoms by stabilizing the H1 receptor's inactive state. The tutorial compares first and second generation antihistamines, noting differences in blood-brain barrier penetration and side effects. It concludes with a discussion on the safety and availability of antihistamines, emphasizing their efficacy in symptom prevention.

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