I had my gallbladder out in April and I also had Hirschprungs disease as an infant. I had a cholostomy and reversal. I have noticed that the vyvanse I take bothers my stomach much worse than before my surgery. I have not taken my meds for 2 weeks. I felt much better. I took vyvanse Saturday, I was ok Saturday, but Sunday and today have not been pleasant. It almost feels like I have a gallstone. Are stimulant meds hard on the digestive system. Also could I be experiencing bile duct issues?