My doctor just put me on Zocor a month agao. Both my bad and good cholesterol were high. My total cholesterol was 273. I am already thin and have a good diet so medication was the next step. I have had back pain, muscle stiffnes in my joints, especially my legs. I can hardly get out of bed in the morning. My chest on the left side hurts all the time and I feel a throbbing in my back on the left side. My doctor has done a ton of blood work and also a cat scan. Everything has came back normal. I did not have any of these symptons until I started the Zocor. I have asked my doctor to take me off of Zocor. One last thing, I have also experienced the diziness and blurred vision just for a moment.