Zocor and primary care

My problem is itching. I have been on Zocor for 3-1/2 years and it did its job by lowering my cholesterol. I started itching about three months ago (all over). I have been to Primary Care physician, dermatologist and allergist. The itching seems better but still have it after being off the Zocor for almost four weeks. I take other medications so I don't know for sure about the Zocor but had to start somewhere. How long after stopping the medication should the side effects disappear?
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I am a 47 year old male who had a heart attack in march of 1993. I have had angioplasty three times with stent implants during the last two procedure's. My primary care physician thought it would be to my benefit to take Zocor. I have been taking 20mg a day for the past 4 years. During the past few months I have been having pain in my right elbow and lack of strength in my arm. I also have been having a steady dull pain in my right leg which runs from my thigh down through my knee and calf. I have had liver function tests done once a year because of an earlier bout with hepatitis and alcohol abuse, but the tests show that my liver is working fine. Does this sound like it could be a side effect of the Zocr?