I mentioned to the Pharmacist that I had been having muscle soreness in my bicep shoulder area and when asked if I were also taking lipitor and said yes, the pharacist advised me to tell my doctor. The doctor advised me to stop the Lipitor. I have stopped the Lipitor for 2 weeks now but still have the muscle soreness (but not quite as severe) My question is that since the diltiazem has not stopped my episodes of atrial fibrillation should I discontinue the diltiazem completely and when the muscle soreness goes away, start taking Lipitor again?