Can vyvanse cause slipping ribs and rib pain? I took it for years with terrible subluxations and pain happening...muscle spasms...I decided to go off of it and within a week all of my rib pain and back pain went away. I m only left with the muscle weakness from the spasms. I am convinced that vyvanse is dangerous. I used to have to use a foam roller to pop the rib heads where they met at my spine in my back and now all of a sudden there s no vyvanse and they re magically better. I don t want to go back on it if its causing my problems. I also am extremely concerned that if a drug can either directly or indirectly cause such debilitating pain then why would it be on the market?