"i started vyvanse about 5 months ago.  my doctor first had me on focalin which helped, but didn&#039;t seem to get me all the way there.  since i have generalized anxiety disorder he started with focalin.  he said focalin was a gentler medication.  after about 2 weeks he started vyvanse at 20mg. i really started to like the medication: more focus, motivation.  i have worked my way up to 50mg.  after a couple of weeks on each dose, the medication doesn&#039;t last the whole 12 hours.  i do really like the medication.  i just hope that i don&#039;t have to keep going up with the dosage."