Hello everyone, this is probably my first post in this section of the forum! While I don't abuse prescription medication or use illegal drugs, I do have a horrible tendency to really abuse the first generation antihistamine, Diphenhydramine and I'm just hoping that I'm not alone, and maybe there is someone out there who can help me break the habit? I take a small 100mg dose fairly often, it used to be every day but now I've narrowed that down to just a couple times a week, if. The most I've ever taken at once was 300mg, although I'll probably be taking 500mg tonight out of curiosity. Also, does anyone know about this stuff having any long term use effects or any really dangerous effects at less than 1000mg? It'll be easier for me to stop if I know that something can end up happening as a long term result from it.