Hi Doc , have been on Rosuvas for few years now, am 55 now, mostly was on Rosuvas 5 , sometimes dosage was increased to 10 mg for few months due to high ldl , but I have severe side effects with 10 mg , like cramps in back ,awfully painful, ache in legs with no injury , it s now affecting my life style l can we change the statin ....or maintain 5 mg....i am other wise active and even during acute muscle pain in kegs I go for walk in the morning...please advise thanks