"i&#039;ve been on concerta for about 2 months now. while the effect is much more gradual compared to the &quot;hitting a brick wall at 100mph&quot; effect aderall gave me, there were some negative aspects. the first week i was a little shaky, which i also had with the other medicines i&#039;ve tried (vyvanse, aderall, ritalin). first dose always seems to make me feel really depressed and sick, then the next day i feel much better after my dose. unfortunately, after the first month of use i&#039;ve built up a strong tolerance to it and it doesn&#039;t work for me anymore. thinking about trying a higher dosage."