My father 63 years is having pain/cramps in legs thigh area which starts at night after onset of sleep and subsides after 5 hrs same thing happens from last thirty yrs. Now diabetic from last 9 years (controlled) is on petril 0.5 even after taking this he is able to sleep it was once diagnosed as restless leg syndrome by one of the doctors. I would like to know if this can be treated and will my father be able to sleep better.