"diagnosed with adhd at age 8, i have tried strattera, concerta, adderall, &amp; ritalin (all had a zombie effect to no effect). it wasn&#039;t until mid 8th grade that i was prescribed vyvanse. a miracle as far as my school performance, grades went from c&#039;s &amp; d&#039;s to straight a&#039;s. not only did i actually want to take it, vyvanse compelled me to ace my schoolwork, resulting in consistent grades of 95  (the only downside being that it induced ocd behavior.) however, while i started at 40mg, i steadily increased to 70mg (max dose) by the end of 10th grade. i have since graduated high school, but due to the tolerance i built up to the medicine it no longer affects me nearly as well as it did before. though i still recommend it to anyone with adhd."