Drug Category: O

Generic Name: Omeprazole Common Brand Names: Prilosec, Losec Introduction Omeprazole is a proton pump inhibitor (PPI) used to treat conditions related to excessive stomach acid production. It is commonly prescribed for gastroesophageal reflux disease (GERD), peptic ulcers, and Zollinger-Ellison syndrome. Conditions of Use (Indications) Gastroesophageal Reflux Disease (GERD): Used to reduce acid reflux symptoms and heal esophageal damage caused by stomach acid. Peptic Ulcers: To treat and prevent duodenal and gastric ulcers, especially those caused by Helicobacter pylori infection (usually in combination with antibiotics). Zollinger-Ellison Syndrome: A rare condition characterized by excessive acid production, often treated with higher doses of omeprazole. Helicobacter pylori Eradication: Often used in combination with antibiotics

Generic Name: Ondansetron Common Brand Names: Zofran, Zuplenz Introduction Ondansetron is a selective serotonin 5-HT3 receptor antagonist used to prevent and treat nausea and vomiting associated with chemotherapy, radiation therapy, and postoperative recovery. Conditions of Use (Indications) 1. Chemotherapy-Induced Nausea and Vomiting (CINV): Effective for acute and delayed phases of CINV. 2. Radiation-Induced Nausea and Vomiting (RINV): Adjunct to radiotherapy. 3. Postoperative Nausea and Vomiting (PONV): Prevention and treatment. Mechanism of Action Ondansetron blocks serotonin (5-HT3) receptors located in the chemoreceptor trigger zone (CTZ) of the brain and the gastrointestinal tract. By inhibiting these receptors, ondansetron prevents the vomiting reflex initiated by emetogenic signals. Side Effects 1. Common Side Effects: