Seeing Shadows in a Wide-Brimmed Hat? Understanding the “Benadryl Hat Man” and How to Stay Safe
What People Call the “Benadryl Hat Man”—and the Real Risks Behind the Meme
The internet has given a nickname to a very specific, unsettling hallucination some people report during misuse of the over-the-counter antihistamine diphenhydramine (commonly known by a brand name, Benadryl): the “benadryl hat man”. Stories often describe a looming, shadowy figure wearing a wide-brimmed hat who appears at night, at the edge of a room, or just outside one’s peripheral vision. While memes and horror threads can make the phenomenon seem like a dark curiosity, it actually points to something medically serious—anticholinergic delirium—and it can be dangerous.
Diphenhydramine is designed to relieve allergy symptoms and can cause drowsiness at norm...