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# Pantoprazole ## Overview Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid production. It is available in oral and intravenous formulations. ## Primary Indications * Gastroesophageal reflux disease (GERD) - symptomatic relief and healing of erosive esophagitis. * Zollinger-Ellison syndrome and other pathological hypersecretory conditions. * Part of combination therapy for *Helicobacter pylori* eradication. ## Adult Dosing * **GERD/Erosive Esophagitis:** 40 mg orally or IV once daily for 4-8 weeks. * **Maintenance of Healing:** 20 mg orally once daily. Doses up to 40 mg orally once daily may be used. * **Hypersecretory Conditions (e.g., Zollinger-Ellison Syndrome):** 40 mg orally or IV twice daily. Doses may be titrated up to 240 mg daily (divided doses). ## Pediatric Dosing * **GERD (Oral):** * 1-5 years: 10 mg orally once daily. * 6-11 years: 20 mg orally once daily for the first 4 weeks, then 10 mg orally once daily. * 12-16 years: 40 mg orally once daily for up to 8 weeks. * **GERD (IV):** * 5-15 years: 1.1 to 1.5 mg/kg/day IV, not to exceed 40 mg daily, administered over 15 minutes. Duration typically 7 days. Dosing for pediatric patients may vary based on specific guidelines and physician discretion. ## Dose Adjustments * **Hepatic Impairment:** Oral: Maximum 20 mg once daily. IV: Use with caution; no specific dose adjustment recommended but monitor closely. ## Contraindications * Known hypersensitivity to pantoprazole, other benzimidazoles, or any component of the formulation. ## Adverse Effects * Common: Headache, diarrhea, nausea, abdominal pain, flatulence. * Serious: *Clostridium difficile*-associated diarrhea, bone fractures (hip, wrist, spine) with long-term use, vitamin B12 deficiency, hypomagnesemia, potential for increased risk of pneumonia. ## Key Drug Interactions * **CYP2C19 and CYP3A4 Substrates:** May increase concentrations of drugs metabolized by these enzymes (e.g., clopidogrel, voriconazole, certain antiretrovirals). * **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity. * **Iron Salts, Ketoconazole, Itraconazole:** Reduced absorption due to decreased gastric acidity. ## Monitoring * Monitor for signs and symptoms of *C. difficile*-associated diarrhea. * Assess for hypomagnesemia, especially in patients on long-term therapy or concomitant use of other drugs that can cause hypomagnesemia (e.g., diuretics). * Monitor bone mineral density in patients at risk for osteoporosis with prolonged use. * Monitor for signs of B12 deficiency with prolonged therapy. ## Clinical Pearls * Oral pantoprazole should be taken 30-60 minutes before a meal. * Do not crush or chew delayed-release tablets; swallow whole. * IV administration requires reconstitution and dilution; follow manufacturer's instructions. * Long-term use (beyond 1 year) should be with periodic reassessment of the need for continued therapy. *** **Disclaimer:** This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant clinical guidelines for complete details and to verify the accuracy of this drug information before making clinical decisions.