Hi. My father is experiencing frequent issues in walking properly. He is taking medicine sturegon twice daily which makes him fine but as soon as he leaves it or makes it once a day, he finds there is no energy in legs and he cant really balance well and his legs shake. His bp and sugar are within limits. He is diebetic and had had stenting done around 6 years back. He has been regular in taking all his medicines and recent blood tests also show all normal stats. Please suggest.