There is a burning sensation at my feet sole and a sense of weakness around my knees my weight is 97 kg is age 37 I visited a doctor he advise you blood test and X-rays of my knee and back test reports reveal acute deficiency of Vitamin D and lower level of vitamin B12 doctor advised 2 inject inject medicine into the knees to promote better mobility and flexibility ,pls suggest whether these inj are safe   ? A permanent  solution . He also advise to take medicine for a month please check the prescription advise accordingly I just want to reconfirm. also need better substitute of the  medicine prescribed (by a prominent  manufacturer).i.e alkem , pfizer , sunpharma , divis , etc