I also take anti seizure anti psychotic meds. I cant fap long sometimes either but thats probably because i dont fap as much as i use to. Thatll get better the longer you take the medicine. My issue that doesnt seem to be goinf away is that i dont cum as hard. But thats kind of a good thing cuz um things would get messy. Lol. Now i can fap and go back to sleep without having to change the sheets.