Thanks for your question on HCM. I can understand your situation and problem. But COPD ( Chronic Obstructive Pulmonary Disease ) is a disease in which due to airway inflammation, sputum production is continuous. If infection is there then sputum production is more. So antibiotic may be needed in your case. I also advise you to enroll in pulmonary rehabilitation center where Chest physiotherapy and deep breathing exercise Are done. This will help you in clearing your secretions easily. You can also try mucolytic and expectorant like N acetyl cystine (NAC), Ambroxol and guifenacine. Zince all these are prescribed drugs, you should consult pulmonologist and discuss all these.