Ive been prescribed concerta the last 2 months or so increasing the dosage every week. I got up to 54mg a day and noticed it actually increased my lasting time in bed. Then just this past week my prescription got changed to 72mg and since this I have been having ED (Erectile Dysfunction) whenever im on the pill. It isn’t isnt the dosage amount because when i was prescribed 54mg there was a time I took 2 in a day (I know thats now recommended) because work was extremely busy that day and I performed that night as usual so im wondering why this new prescription has caused this problem out of nowhere. Im going to ask my doctor when i see him next week just seeing if anyone has any information on it since I don’t want to spend the next week not taking my pill any day I intend on having sex that night.