I slammed up to 300mg diphenhydramine and did not find the effects unpleasant. There is a considerable rush and it makes my whole body feel as if it was made of jello. The hallucinations can be unpleasant or downright terrifying. It might not be the healthiest or safest drug, but people need to stop bashing this chemical the way they do. Most are talking out of their asses and those who are not simply did not have any interest in what the substance would bring upon them. It's rough, it will floor you, it can be scary, I would by no means recommend using large doses of it (!!), especially not due to lack of access to other psychoactive drugs, boredom, curiosity and most of all: not to inexperienced drug users! Nonetheless, I never regret using it and in my opinion it is (at low doses) the most valuable sleep medication available next to cannabis.