I've been taking Xarelto for about 60 days, and muscle soreness seems to be getting worse. I wake each morning with shoulder, arm and leg soreness. At 64 years old, I presumed it was just old age symptoms. I now suspect that this new medication might be the culprit. I must take the medication because of atrial fibrillation episodes from time to time. Is there a solution, or should I just learn to live with the pain? My suspicion includes potential internal damage from a drug that causes pain. Am I thinking correctly here??