Tag: diphenhydramine

First-Generation Antihistamines: Why Severe Drowsiness and Anticholinergic Effects Matter
November, 1 2025

First-Generation Antihistamines: Why Severe Drowsiness and Anticholinergic Effects Matter

First-generation antihistamines like Benadryl cause severe drowsiness and long-lasting cognitive impairment due to brain penetration and anticholinergic effects. Safer alternatives exist for allergies and sleep.

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