Justyl Injection contains Acetylcysteine 200mg, a mucolytic agent used primarily to reduce the viscosity of mucus in respiratory tract disorders. Acetylcysteine acts by breaking the disulfide bonds in mucoproteins, thereby liquefying thick sputum and facilitating expectoration. This injection is indicated for the management of conditions characterized by excessive or thickened mucus secretions, such as chronic bronchitis, cystic fibrosis, and chronic obstructive pulmonary disease (COPD). Additionally, Justyl Injection is utilized as an antidote in acetaminophen (paracetamol) overdose to prevent hepatic damage by replenishing intracellular glutathione stores and enhancing detoxification. The recommended dosage and administration should be strictly followed as per clinical guidelines, with intravenous infusion being the preferred route. Caution is advised in patients with hypersensitivity to acetylcysteine or any component of the formulation. Adverse effects may include nausea, vomiting, rash, and rarely, anaphylactic reactions. Monitoring for respiratory status and allergic responses during administration is essential. Justyl Injection should be used under medical supervision, ensuring appropriate supportive care and adherence to contraindications and precautions to maximize therapeutic benefits and minimize risks.