LAN 30 Capsule contains Lansoprazole 30 mg, a proton pump inhibitor (PPI) used primarily to reduce gastric acid secretion. Lansoprazole acts by selectively inhibiting the H+/K+ ATPase enzyme system located on the gastric parietal cells, thereby suppressing the final step of acid production. This mechanism makes LAN 30 effective in the treatment and management of various acid-related gastrointestinal conditions such as gastroesophageal reflux disease (GERD), erosive esophagitis, Zollinger-Ellison syndrome, and peptic ulcer disease. The capsule formulation allows for convenient oral administration, with absorption occurring in the small intestine due to its acid-labile nature. LAN 30 is typically prescribed to provide symptomatic relief from heartburn, acid regurgitation, and epigastric pain and to promote healing of inflamed or ulcerated mucosa. It is important to adhere to the prescribed dosage and duration of therapy to achieve optimal therapeutic outcomes and minimize the risk of recurrence. Common adverse effects may include headache, abdominal pain, diarrhea, and nausea, though it is generally well tolerated. LAN 30 should be used cautiously in patients with hepatic impairment and is contraindicated in individuals with known hypersensitivity to lansoprazole or other PPIs.