There is this drug, generic name Methylphenidate, but you may know it as Concerta or Ritalin. My doctor recommended that I should take it as a stimulant, to increase my alertness and improve working performance. I’ve got to say that my work days have been really hectic of late and I sometimes find it hard to keep up, hence the recommendation. So what I would like to know is how long does this Concerta last? No, I am not dumb and can read the information online; I just want to know how long it really last for actual people, IYKWIM.