My problem is itching. I have been on Zocor for 3-1/2 years and i...

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? pg