I had a red rash on my lower legs, and I am so tired, and so sleepy. Will this go away? I feel achy all over, my sore throat has cleared, had ulcers down my throat.. I just plain do not want to move around at all. I had heart bypass surgery 6 years ago, and I am diabetic... I have been off of the Cimetidine for almost a week now, I just want to feel better.