Hi, in the past 12 hours I have had roughly 700mg methylphenidate.. I didnt know I had that much I was just having more and more popping the tablets not keeping account. In my head i thought my prescription was for 500mg but i forgot it was recently upped and I had a prescription for 28 x 25mg.. I cant find anyone online who has had that amount of ritalin/methylphenidate do i need to rish to the hospital my last hit was like 200mg and im just coming up now