problems, such as chest pain or fainting. vyvanse should not be taken if you or your child has advan...Recent Study Demonstrated VYVANSE(R) (lisdexamfetamine dimesylate) CII Provided Improvements in Behavior, Inattention, and Math Test Scores from 1.5 Hours up to 13 Hours following Administration in Children with ADHD... vyvanse is the first oral ADHD stimulant medication with p...rder (ADHD).