Stop Using Benadryl? BIG PHARMA SWEETHEART – July 16, 2025 - Benadryl causes drowsiness by blocking H1 receptors and crossing the blood-brain barrier But it also does other things that can create side effects. For instance, it blocks ... Read More...Addiction RecoveryBig PharmaBooks, Memoirs, Films, and MediaDrug Abuse and AddictionJuly 29 2025