"i&#039;m a 40 yr old female and i&#039;ve been on several different medicines before vyvanse. i have now been on vyvanse for about 6 months (100mg )and it has by far been the best. i even had my 14 yr. old son switched to it and he&#039;s doing better also. he has been on several that have worked for awhile then stopped. at first you might feel a little strange, but that goes away within a couple weeks. if you have this, i highly recommend trying this."