So my dad caught covid pneumonia back in February and his CT score was 1925. He was in the ICU for a month and after he got better, his oxygen levels were around 96-97. But now, for the last couple of weeks, he's been dealing with a dry cough and a low-grade fever. We did a covid test and it came back negative, but a urine test showed a bacterial infection. He's on niftran 100mg for that. My concern is that his dry cough has turned into a chesty cough, and for about 45 days, his oxygen levels have been fluctuating between 88-93. With oxygen support, he can maintain 98. The doctor recommended pirfenex200 for fibrosis and I have an X-ray report attached. Is there any medication or treatment you can suggest for the chesty cough?

the tablet given by doctor is good. kindly follow the same medicine