<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hello, I have been on prescription Prilosec for a few days to combat reflux. Today I noticed some light headedness and difficulty breathing getting a deep breath. Could these be side effects of the drug or what s happening with my stomach acid? Thank you.  <response>: Hello, Even without lung problems, HERD reflux can cause shortness of breath and difficulty breathing. Treatment can be a double-edged sword. HERD medicines like PPI scan actually increase pneumonia risk, according to several studies and very rarely light-headedness. You should take an appointment with your doctor to evaluate your health condition. Hope I have answered your query. Let me know if I can assist you further. 