Sandy, I can't help you with the combination of the drugs, but I do know that it was Simvastatin 40mg which caused me serious problems with muscle pain and weakness, and I was taken off them. The damage was done by the time I was moved to Atorvastatin 20mg - so after a period without any (during which time my cholesterol was unmanaged) - the GP's now put me on Fluvostatin 20mg. I'm only been on them for 2 months (awaiting latest blood results) but fingers crossed, no muscle pain.