Than vitamin supplements. Recently I have been experiencing stiffness and pain in my upper arms and shoulders, knees, legs and feet when I get up in the morning and when I am on my feet for a long period of time. This usually subsides once I I am up for a while, but if I sit for a period of time, the stiffness and pain returns. Could this be from stopping the HTR medication?. I never experienced this while on these meds.