This might sound strange to you (& I'm not suggesting that it applies to you), but my voices, especially one or two of them,deliberately cause physical behaviors & sensations of muscles & pain receptors. Honestly, the brain is capable of many things. I've had to deal with it & adjust to it, in order to live my life & keep the best attitude I can. I know there are worst things in this world & I'm thankful things aren't worse for me. I do agree that the meds are notorious for creating the things you are experiencing. I'm not on meds, except for atenolol, for blood pressure. Anyway, I thought this might be of interest. One never knows how an added input might be of help somehow. Hugs to you. I wish you all the best.