Effects - Dizziness on vyvanse?

[*ChemBabe*]

SWIM was told by her psychiatrist that vyvanse would not make her dizzy like strattera did. While on 120mg of strattera, SWIM would get so dizzy during swim practice, she couldn't finish the workouts. Today was her second day on vyvanse and 20 minutes into the workout, she had to get out of the pool because she was light headed and the workout felt much harder than it actually was . Not only was her head dizzy, but her muscles were too (yes, SWIM knows that makes no sense, but SWIY gets what SWIM means). SWIM is also not feeling these great effects everyone talks about. Her appetite has actually increased and she feels no more focused than she previously was (and yes, she knows its only the second day...). So SWIM's question is, has SWIY ever experienced dizziness such as this on vyvanse? And while on the topic, does SWIY most definitely feel more focused and are aware of the effects while on this medication? What's SWIM to do ?