Benadryl brain study halted after just 3 volunteers
Knowledge-focused
Terminated
This study aimed to measure how a single IV dose of diphenhydramine (Benadryl) affects thinking, memory, and alertness over time. Researchers planned to compare effects in middle-aged and older adults. However, the study was terminated early after enrolling only 3 participants, s…
Phase: PHASE4 • Sponsor: Dent Neuroscience Research Center • Aim: Knowledge-focused
Last updated Jun 27, 2026 08:13 UTC