Renal impairment symptoms and conditions

I am a male, 61. and have a history of switching around cholesterol meds, most recently because of cost due to my high number of medical conditions and large number of medications for, but not limited to: CAD. CHF, diabetes, hypertension, renal impairment, and herniated disks. I have barely been on zocor a month and have experienced extreme weakness, pain in neck, shoulder, hands, legs & feet. Because I have both cervical & lumbar herniations, I was somewhat uncertain until I began reading these posts. I took myself off zocor yesterday and emailed my doctor's nurse. It also occurred to me that after any length of sitting, my legs hurt upon standing while i was on Lipitor, but don't really recall other symptoms. Sometimes, when you have a number of health issues, you come to believe this is "as good as it gets," but now I believe differently, otherwise why bother with the meds at all.