Thanks for your question on HCM. I advice you not to take antibiotics without culture and sensitivity report. COPD is chronic progressive lung disease. It actually decrease the lung immunity and defence. So recurrent respiratory infections are very common in COPD patients . So better to get done sputum culture to know which organism is causing infection and than get done sensitivity report to guide antibiotic therapy. Haphazard use of antibiotics will increase drug resistance, decrease quality of life and delay recovery. You should take adult respiratory vaccines like pneumpcoccal and influenza to prevent recurrent lung infection. So better to consult pulmonologist first and discuss all these, rather than taking antibiotics.