Macphylline SR 200 Tablet contains Acebrophylline 200 mg, a bronchodilator with mucolytic and anti-inflammatory properties, primarily indicated for the management of respiratory conditions characterized by bronchospasm and excessive mucus production such as chronic obstructive pulmonary disease (COPD), bronchitis, and asthma. Acebrophylline acts by relaxing bronchial smooth muscles, thereby improving airflow and reducing airway resistance. Additionally, it facilitates mucus clearance by decreasing viscosity and enhancing ciliary activity, which aids in alleviating symptoms like cough and breathlessness. The sustained-release formulation ensures a prolonged therapeutic effect, allowing for twice-daily dosing and improved patient compliance. Macphylline SR 200 is generally well tolerated; however, it should be used with caution in patients with cardiovascular disorders, as it may cause tachycardia or palpitations. Common adverse effects may include gastrointestinal discomfort, headache, and dizziness. It is contraindicated in individuals with known hypersensitivity to Acebrophylline or related xanthine derivatives. Dosage adjustments may be necessary in patients with renal or hepatic impairment. Macphylline SR 200 should be used under medical supervision, and patients are advised to report any unusual symptoms promptly.