Zerotuss XP Syrup is a combination expectorant and bronchodilator formulation containing Ambroxol (30mg/5ml), Levosalbutamol (1mg/5ml), and Guaifenesin (50mg/5ml). Ambroxol acts as a mucolytic agent, facilitating the breakdown and clearance of viscous mucus from the respiratory tract, thereby improving airway patency. Levosalbutamol, a selective β2-adrenergic agonist, promotes bronchodilation by relaxing the smooth muscles of the bronchial airways, which aids in alleviating bronchospasm and improving airflow in obstructive airway conditions. Guaifenesin serves as an expectorant, enhancing the hydration of airway secretions and promoting effective mucus clearance through coughing. The synergistic action of these active ingredients makes Zerotuss XP Syrup effective in managing respiratory conditions characterized by productive cough, bronchial congestion, and bronchospasm, such as acute and chronic bronchitis, asthma exacerbations, and other obstructive pulmonary diseases. It is indicated for symptomatic relief of cough with excessive mucus production and bronchial obstruction. Administration should be as per physician’s guidance, considering contraindications such as hypersensitivity to any component, and caution is advised in patients with underlying cardiac or thyroid disorders due to the presence of Levosalbutamol. Adverse effects may include gastrointestinal discomfort, tremors, or palpitations, and patients should be monitored accordingly.