So I filled a prescription for generic adderall XR 30 mg (switched from vyvanse 70 mg which I've taken for months) and after taking it for a week it seems to be much less effective than when I took name brand adderall xr years ago. Also it doesn't last as long and has some unpleasant side effects. I've been eating and sleeping properly so I don't believe the issue is with me personally. The manufacturer of this prescription was Prasco Laboratories. I can have my next prescription filled with either Sandoz or Impax but I'm not sure which would be better (by which I mean work like it's supposed to). Can anyone advise what I should do here? Thank you!