Hello dear, thanks for your question on HCM. I can understand your situation and problem. Recurrent chest infection in old age can be dangerous. Ideal treatment of chest infection is to identify the causative organism first and then start appropriate antibiotic which is effective on that organism. So you should consult pulmonologist and get done 1. CT thorax 2. Sputum culture and sensitivity 3. Bronchoscopy and BAL ( Bronchoalveolar lavage ) analysis. CT thorax is more superior then simple x ray in diagnosis of chest infection. Sputum culture is needed to identify the causative organism. If you are not having sputum production then bronchoscopy and BAL should be done. Haphazard use of antibiotic can lead to delayed recovery and increase drug resistance. So better to consult pulmonologist and discuss all these and start appropriate treatment. Don t worry, you will be alright.