Answers by TheMediTary.Com - Last updated: 12-Jul-2023
The Hat Man is a fictional figure that started appearing on certain internet sites in the early 2000s that has recently been referred to as the “Benadryl Hat Man” after reports of people hallucinating and sighting him after overconsumption or abuse of Benadryl. Most of these reports have appeared on Reddit or the image-based bulletin site 4chan.
The Hat Man has also been associated with abuse of any mind-altering substance taken to excess and there is a mini-documentary about him being associated with sleep paralysis on YouTube.
High doses of Benadryl can cause heart arrhythmias, delirium, psychosis, seizures, coma, and death.