<s>[INST] I have had pneumonia for 3 weeks. Fist antibiotic was doxycycline. took for one week the developed a sinus infection so took augmentin and stopped doxy. Took that for one week. Very little improvement in how I felt. Chest xray repeated . R lung cleared Left lung ?. Had ct scan of lungs showing inflammation of left lung. Now on levoquin for 4th day and still feel fatigued and nopt any better. All this after 4 months of sinus infections and various antibiotics. I am 64 and very concerned. [/INST] Hi, Thank you for your query. I can understand your concerns. It seems that you have delayed resolution of pneumonia. Inappropriate antibiotics or poor patient compliance, suboptimal dose, incomplete treatment, Chat Doctor. Immunocompromised patient -decreased host resistance like diabetes mellitus, chronic alcoholism, Agranulocytosis, hypogamaglobulianemia, elderly and debilitated patient are other contributing factors in different cases. Since your response to treatment is slow, co-morbidities need to be ruled out.However, a prolonged course of suitable antibiotic /s will likely to resolve the problem. Regards  </s>