I recently had my Adderall prescription changed by my doctor. My ADD symptoms have decreased significantly with my current rx, but I am beginning to experience muscle stiffness and 2-3/10 pain along my neck and spine in the late afternoon/evening. I was curious to know if this is a common side effect associated with Adderall and if so, are any common tx options (ie switching from amphetamine salts to name brand Adderall/alternative ADD medications/etc). I am scheduled to meet with my psychiatrist next week, but thought in the meantime I d see what the medical community here had to say. Thank you for your time, Lisa Original rx: amphetamine salts XR 30mg 2xdaily (morning/lunch) Current rx: amphetamine salts XR 20 mg 2xdaily (morning/lunch) amphetamine salts 10mg 1xdaily (late afternoon).