Hi, I have a question regarding old prescriptions- I have an old Vyvanse prescription, I stopped taking it a long time ago because it kept me up at night; that was the only problem I had with it, otherwise it worked great for my ADHD. However, I work night shifts now, and decided to resume taking the medication. I still have some old ones left, so I started taking them (as prescribed) and plan on seeing a doctor next week to renew my prescription. *However, I just got randomly drug tested at my work, and the thought occurred to me- Could they and would they fire me, legally, for testing positive on a substance that I DO have a prescription for, though it is an old one?*