Erophylline AC 100mg/600mg Tablet is a combination medication containing Acebrophylline 100mg and Acetylcysteine 600mg, indicated for the management of respiratory conditions characterized by bronchospasm and excessive mucus production. Acebrophylline, a bronchodilator with mucosecretolytic properties, facilitates airway relaxation by inhibiting phosphodiesterase enzymes and promoting smooth muscle relaxation, thereby improving airflow in obstructive pulmonary diseases such as chronic obstructive pulmonary disease (COPD) and asthma. Acetylcysteine acts as a mucolytic agent by breaking disulfide bonds in mucus glycoproteins, reducing mucus viscosity and enhancing expectoration. The synergistic action of these components aids in alleviating symptoms like breathlessness, cough, and sputum retention, improving pulmonary function and patient comfort. Erophylline AC is typically administered orally, with dosage and duration tailored according to clinical severity and patient response. It is contraindicated in patients with hypersensitivity to either component and should be used cautiously in individuals with peptic ulcers or hepatic impairment. Adverse effects may include gastrointestinal disturbances, headache, or allergic reactions. This combination therapy offers a comprehensive approach to managing obstructive airway diseases by addressing both bronchoconstriction and mucus hypersecretion, thereby optimizing respiratory function and quality of life.