Sorry if you've already addressed these issues, but I have an elderly friend with PD who suffers from rigidity esp in her back (constantly bends way over and to one side when standing) and both arms/hands tremble a great deal. Does anyone have any suggestions? She currently takes Sinemet (not sure of dosage). Wish I could find something to help her more...She takes natural products as well which have greatly helped her with energy, depression, and stamina, but seems the shaking is still pretty bad and muscles are still rigid. Any suggestions/help? Will welcome your advice. Thanks! She's 81/appx 8 yrs. PD Dianne