All of the 1st generation antihistamines, Benadryl, hydroxamine,etc, are what are called deleriants and are just awful to use recreationally.
Most I've ever had was 150mg IV to counter an allergic reaction, and I hallucinated my brains out. Lots of unpleasant body sensations and flipping spiders everywhere.
Reading about Benadryl "trips", spiders seem to be a common thread.
Do be aware though that 1st generation antihistamines potentiate the effects of opiods, opiates, and benzodiazepams. They make the effects both stronger and longer lasting.
