I have Chronic Myeloid Leukemia and take Gleevec 400mg. For the last 4 days I have a shortness of breath, pain on the back of my neck, pulsating neck veins/lymph nodes just below my jaw and stiffness in jaw. These symptoms have come and gone for 6 months. I ve had chest X-rays and CT scans which have only shown minor scarring. I had an esophagram that showed minor reflux. I ve been told occasionally that my potassium is low, that I may have GERD and Anxiety. But I m careful with what I eat, I have plenty of sleep and I feel exceptionally mentally stable. I have the CT Scans on-hand.