My father was covid positive on 24 april we did treatment at home and he suffers from oxygen problem now he is fine except cough. He has asthma since many years. Now he has dry cough and it's been 1 month cough is little less then before but it presents and in the morning whenever he sites up the cough starts when he did and physical activity then cough starts. I consulted with chest specialist doctor and he said x ray and lft (his sgot-98, sgpt-440. It was high) he gives 15 days medicine (t. Defcort, syrup alex, t. Limcee, t. Zincovit, t. Atlospon) after 15 days I did x ray was better and lft (sgot-64 ,sgpt-144) now Dr. Gives same medi. + includes 1 more hepamerz sachet so I want to know how to treat dry cough and is these medicines are good for this problem or not and what is the use of hepamerz becz it's little costly for us she gives for 15 days twice a day so it's for what?