Benadryl and DPH memes represent a dark, surreal corner of internet culture that satirizes the hallucinogenic side effects of high-dose Diphenhydramine. Central to this trope is 'The Hat Man,' a recurring shadow figure archetype that many internet users jokingly (or semi-seriously) claim to see during DPH-induced delirium. These memes often utilize low-fidelity imagery, static filters, and references to spiders or 'shadow people' to convey a sense of disjointed reality. While they began in niche subreddits like r/DPH, they have evolved into a wider aesthetic movement, blending weirdcore and dark humor to highlight the bizarre experiences associated with OTC medication misuse.