Why Does BENADRYL Knock You Out?
About this video
Ever wondered why Benadryl makes you sleepy? This video explains how first-generation antihistamines cross the blood-brain barrier, causing drowsiness by blocking H1 receptors in the brain. Discover why newer antihistamines don't have this effect and how to choose the right allergy medication for your needs. Chapters: 00:00 The Drowsy Pill 00:10 Chemistry Problem 00:26 Not a Side Effect 00:40 Size Matters 00:55 Understanding Trade-offs
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