Zinetac 150mg Tablet contains ranitidine, a histamine H2-receptor antagonist used primarily to reduce gastric acid secretion. It is indicated for the treatment and prevention of conditions associated with excessive stomach acid, including gastroesophageal reflux disease (GERD), peptic ulcer disease, Zollinger-Ellison syndrome, and erosive esophagitis. By selectively blocking H2 receptors on gastric parietal cells, ranitidine decreases both basal and stimulated acid secretion, promoting ulcer healing and symptom relief. Zinetac 150mg is typically administered orally, with dosage and duration tailored to the specific condition and patient response. It is generally well-tolerated, though potential adverse effects may include headache, dizziness, constipation, or diarrhea. Caution is advised in patients with impaired renal or hepatic function, and dosage adjustments may be necessary. Zinetac should be used under medical supervision, and patients should inform their healthcare provider of any other medications being taken to avoid potential drug interactions. While effective in acid suppression, ranitidine has been largely replaced by proton pump inhibitors in certain clinical scenarios, but remains a valuable therapeutic option. Patients should adhere to prescribed dosing and report any unusual symptoms promptly.