My father aged 54 years had a pnemothorax attack 1 week ago. Done surgical chest tube operation. Now he is completely fine with 95 co2. He is suffering from cough from 1.5 months. Had syrups glinlinctus syrups with antibiotics,multivitamins. Had many syrups with medicines. Now, not that chronic cough like before operation, but not fully recovered from cough. Severity score : 9/25 with 60% lungs working according to HRCT scan