Sorry to hear that--I know you had your hopes up. I think 70 mg is a pretty high dose. (I take 20-30, on the low end.) I did find that the Vyvanse helped me right away, I didn't have to wait weeks for an effect. Is your main reason for switching off the Concerta because it wears off around 4 pm? If so, could you take a "chaser" about 4 pm with a short-acting version? There are days when in addition to my Vyvanse, I take a quick-acting generic of adderall in the late afternoon. Helps me retain focus a bit longer. Best of luck!