I got a new prescrption of Adderall XR 15mg today. I usally got 5mg. I mistake 15mg for 5mg, I took 2x15mg and after a while 2x15mg and and hour ago 3x15mg and I was thinking taking 3x5mg. Now that mean I took 105mg today, is it normal? The more I went up was 75mg. Can a person take 105mg a day? I red that some people take 100mg is it true? Hopefully someone can reply soon. Thanks and take care!