Hi there are different prescription drugs that your GP can try. My husband had been on atorvastatin for many years, were good at the job but had started giving him side effects, tired & lethargic, joint aching. He was taken off them for a couple of weeks, taking nothing and he felt much better. His GP has now tried him on a different one, 'Pravastatin' and he is much better, no probs at all. Go back & see GP.
As to original question, diet and exercise & keep to a reasonable weight.