Suggest Remedy To Reduce Shaking Of Legs While Standing Or Moving

my moms legs become very shaky when she stands, starts to walk, or go down stairs, now she is barely able to walk and is in alot of pain. She has arthritis in both hips, although pain is more severe in one hip, she broke the other hip about 4 years ago and it was repaired. She also has scoliosis and recently had the X-box implant in her spine. Her walking and shaking has become worse. What should she do?