Effenac AB Tablet is a combination medication containing Acebrophylline 100mg and Acetylcysteine 600mg, formulated to improve respiratory function. Acebrophylline acts as a bronchodilator and anti-inflammatory agent that helps relax airway muscles and improve airflow, while Acetylcysteine works as a mucolytic agent that breaks down thick mucus in the lungs. This dual action helps relieve symptoms such as coughing, chest congestion, and breathing difficulty. Effenac AB Tablet is commonly used in the management of respiratory conditions such as asthma, chronic bronchitis, and chronic obstructive pulmonary disease when taken as prescribed by a healthcare professional.