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# Pantoprazole ## Overview Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion. ## Primary Indications * Healing of erosive esophagitis * Maintenance of healing of erosive esophagitis * Symptomatic gastroesophageal reflux disease (GERD) * Reduction of risk of NSAID-associated gastric ulcers (in patients taking NSAIDs) * Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome) ## Adult Dosing * **Erosive Esophagitis:** 40 mg once daily for up to 8 weeks. Maintenance: 40 mg once daily. * **Symptomatic GERD:** 40 mg once daily for up to 4 weeks. * **NSAID-Associated Ulcer Prophylaxis:** 40 mg once daily. * **Pathological Hypersecretory Conditions:** Starting dose 40 mg twice daily, may increase to 80 mg twice daily or higher based on response. Doses >80 mg/day should be divided and given twice daily. Maximum dose: Generally 40 mg twice daily for GERD-related indications; higher doses may be used for pathological hypersecretory conditions under specialist guidance. ## Pediatric Dosing * **Erosive Esophagitis (12 to 16 years):** 40 mg once daily for up to 8 weeks. * **Symptomatic GERD (5 to 16 years):** 20 mg once daily for up to 4 weeks. * **Erosive Esophagitis (5 to 11 years):** 20 mg once daily for up to 8 weeks. * **Symptomatic GERD (5 to 16 years):** 20 mg once daily for up to 4 weeks. Dosing for children younger than 5 years is not established. ## Dose Adjustments No dose adjustment is typically required for hepatic or renal impairment. However, caution may be advised in severe hepatic impairment. ## Contraindications * Known hypersensitivity to pantoprazole, other substituted benzimidazoles, or any component of the formulation. ## Adverse Effects Common: Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness. Less Common: Liver enzyme elevations, rash, pruritus, urticaria, arthralgia. Long-term use (generally >1 year) has been associated with an increased risk of: * Clostridium difficile-associated diarrhea * Bone fractures (hip, wrist, spine) * Vitamin B12 deficiency * Hypomagnesemia (may be asymptomatic or manifest as tetany, arrhythmias, seizures) * Cutaneous and systemic lupus erythematosus ## Key Drug Interactions * **Certain Antiretrovirals (e.g., nelfinavir, atazanavir):** Pantoprazole may decrease serum concentrations of these drugs due to increased gastric pH. * **Methotrexate:** PPIs may increase methotrexate levels. Consider holding PPI during methotrexate administration, especially at high doses. * **CYP2C19 Substrates (e.g., clopidogrel):** Pantoprazole is a moderate inhibitor of CYP2C19. Concurrent use with clopidogrel may reduce clopidogrel's antiplatelet activity. The clinical significance is uncertain. * **Drugs Dependent on Gastric pH for Absorption (e.g., ketoconazole, itraconazole, iron salts):** Pantoprazole may decrease absorption. ## Monitoring * Monitor for signs and symptoms of Clostridium difficile infection. * Monitor magnesium levels, especially in patients on long-term therapy or those taking concomitant medications that may lower magnesium levels (e.g., diuretics). * Consider monitoring vitamin B12 levels in patients with long-term therapy and risk factors for deficiency. * Monitor bone mineral density in patients at risk for osteoporosis. * For pathological hypersecretory conditions, monitor gastric pH and acid output to guide therapy. ## Clinical Pearls * Pantoprazole is generally administered orally 30-60 minutes before a meal. * IV formulation is available for patients unable to take oral medication. * Long-term use should be for the shortest duration needed to manage the condition. Reassess need for therapy periodically. * When treating erosive esophagitis, a course of up to 8 weeks is typically sufficient; if healing has not occurred, consider an additional 8-week course. * PPIs are among the most commonly prescribed drugs. It is crucial to ensure appropriate indication and duration of therapy. *** **Disclaimer:** This information is intended for clinical use and does not replace professional medical advice. Always consult the most current prescribing information and relevant literature for complete details and to confirm doses and indications before making therapeutic decisions.