How do you figure out how much to take? I don't have my PCM's support on this at all. At least I don't have the support of the person filling in for him. (He's doing a fellowship at a civilian hospital at the moment.) My number is at 548 but I have PAINFUL numbness in my hands and feet along with shaky balance. I'm thinking I'm going to need to buy the shots myself and go for it and I know that one kind is easier for the body to absorb than the other but....how much? My hand was numb for three days (my non dominant one) and she insisted it was carpal tunnel.