Walamycin Suspension contains Colistin Sulphate 12.5 mg per dose and is an antibiotic indicated for the treatment of infections caused by susceptible strains of Gram-negative bacteria, including Pseudomonas aeruginosa, Acinetobacter species, and certain Enterobacteriaceae. Colistin, a polymyxin antibiotic, exerts its bactericidal effect by disrupting the bacterial cell membrane, leading to cell death. Walamycin Suspension is primarily used in cases where alternative antibiotics are ineffective or contraindicated, particularly in multidrug-resistant infections. It is suitable for pediatric and adult patients requiring oral administration of colistin. The suspension formulation facilitates accurate dosing and improves patient compliance. Walamycin should be administered as prescribed, with dosage adjustments based on the severity of infection, patient weight, and renal function. Adverse effects may include nephrotoxicity, neurotoxicity, and hypersensitivity reactions; therefore, monitoring renal function and neurological status during therapy is recommended. Contraindications include hypersensitivity to colistin or other polymyxins. Caution is advised in patients with preexisting renal impairment or neuromuscular disorders. Walamycin Suspension should be stored at controlled room temperature and protected from light. This medication should be used under strict medical supervision to ensure efficacy and minimize the risk of resistance development.