Very severe rash, dryness and itching, covering entire body.patient is taking Tracleer, Ravatio and Ventavis for treatment of Pulmnanary Arterial Hypertension. Also was taking Revlimid for treatment of Multiple Myeloma. Revlimid was halted 5 weeks ago, but rash is still raging. Could Tracleer be the cause and not the Revlimid?