I take vyvanse regularlly and was recently given a random drug test at the psych dr. but tested positve for ritalin not vyvanse?

Urine + for ritalin: I take vyvanse regularlly and was recently given a random drug test at the psych dr. But tested positve for ritalin not vyvanse? ANS: ritalin and vyvanse are very close chemical cousins so depending on which test they used they may either show + test but they cannot tell which one it is. Ask your team doing the test if they cross react in the test they use.