Ranitidine Injection is a widely used H2 receptor antagonist that effectively reduces gastric acid secretion, providing relief in conditions like peptic ulcers, gastroesophageal reflux disease (GERD), and Zollinger-Ellison syndrome. Administered intravenously under medical supervision, it is commonly used in hospital and emergency settings where rapid acid suppression is required. By inhibiting histamine action on gastric parietal cells, Ranitidine Injection helps heal ulcers, prevent gastrointestinal bleeding, and manage acid-related complications. Its fast onset of action and reliable efficacy make it an essential medicine in critical care, surgical procedures, and patients unable to take oral medications.