I was on Lipitor for several years with no problems until my insu...

I was on Lipitor for several years with no problems until my insurance company stopped paying. My doctor put me on Zocor. I have been on Zocor for 2 months. Within the last few weeks I've noticed my knees being stiff. I'm a teacher and am up and down so this is not only painful but inconvenient. I mentioned the stiffness to my pharmacist this evening when I went to pick up my new prescription and he took it from my hand and told me it was not a good thing to have and to call my doctor with the problem. Just from the little he said I assume the side effects can be really bad. I'll call my doctor tomorrow.