Opal 10 Capsule contains Omeprazole 10 mg, a proton pump inhibitor used to reduce gastric acid secretion in the treatment of various acid-related gastrointestinal disorders. Omeprazole works by selectively inhibiting the H+/K+ ATPase enzyme system located on the parietal cells of the stomach lining, thereby suppressing the final step of acid production. This action helps in the management of conditions such as gastroesophageal reflux disease (GERD), peptic ulcer disease, Zollinger-Ellison syndrome, and erosive esophagitis. Opal 10 Capsule is indicated for symptomatic relief of heartburn, acid indigestion, and sour stomach associated with excessive acid production. It is also used as part of combination therapy for the eradication of Helicobacter pylori infection to reduce the risk of ulcer recurrence. The recommended dosage and duration of therapy depend on the specific condition being treated and the patient’s clinical response. Omeprazole is generally well tolerated; however, potential side effects may include headache, abdominal pain, nausea, diarrhea, and rare hypersensitivity reactions. Long-term use should be monitored by a healthcare professional to avoid complications such as vitamin B12 deficiency or bone fractures. Opal 10 Capsule should be taken before meals for optimal efficacy and is contraindicated in patients with known hypersensitivity to Omeprazole or other proton pump inhibitors.