What Causes Rashes Throughout Body 36 Days Post Aortic Valve Replacement And CABG?

i am 36 days post op, aortic valve relacement ,2 cabg, and pacemaker. and have developed a skin rash, abd, legs, arms chest back, feet. cardiovascular surgeon d/cd lasix and amiodarone, stated it should begin to get better in 2/3 days. Will see cardiologist in 7 days No itching, rash is slightly raised, some of rash is flat. No tongue swelling, or throat swelling. no oozing. I am concerned that it is the same , and am wondering if the amiodarone ,200 mg bid, that I was on 3 days prior to surgery, and until d/cd tues. is the culprit. I am doubtful that lasix caused this. I had a friend that developed Stevens/ Johnson syndrome a few years ago from a drug. This frightens me. Except for the rash, I am healing well, feel good, using sternal precautions, have a good appetite., sleeping well, no pain.