This document presents a case study of a 50-year-old male patient admitted to the pulmonology department with acute respiratory failure. The patient reported symptoms of breathlessness, cough with expectoration, fever and chest pain. On examination, the patient had elevated temperature, blood pressure, pulse and respiratory rate. Based on the patient's history of COPD and investigations, he was diagnosed with acute respiratory failure. His treatment plan included antibiotics, bronchodilators and corticosteroids.