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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Healing of erosive esophagitis associated with gastroesophageal reflux disease (GERD)
* Maintenance of healing of erosive esophagitis
* Pathological hypersecretory conditions, including Zollinger-Ellison syndrome (ZES)
* Treatment of heartburn and other symptoms of GERD (off-label or as adjunctive therapy)
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally once daily for up to 8 weeks. For maintenance of healing, 40 mg orally once daily.
* **Zollinger-Ellison syndrome:** 40 mg orally twice daily. Doses may be increased to 80 mg orally twice daily.
## Pediatric Dosing
* **Erosive esophagitis (age 5 to 16 years):** 20 mg to 40 mg orally once daily for up to 4 weeks.
## Dose Adjustments
No dose adjustment is typically needed for hepatic or renal impairment.
## Contraindications
Known hypersensitivity to pantoprazole or any component of its formulation.
## Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, vomiting, dizziness, flatulence.
Long-term use may be associated with: Bone fractures (hip, wrist, spine), Clostridium difficile infection, vitamin B12 deficiency, hypomagnesemia, and potentially kidney disease.
## Key Drug Interactions
* **Drugs dependent on gastric pH for absorption:** Antiretrovirals (e.g., atazanavir, nelfinavir), antifungals (e.g., ketoconazole, itraconazole), certain tyrosine kinase inhibitors. May decrease absorption.
* **Warfarin:** May increase INR and prothrombin time. Monitor INR closely.
* **Methotrexate:** May increase methotrexate levels. Consider dose reduction or temporary discontinuation of pantoprazole.
* **CYP2C19 substrates:** Pantoprazole can inhibit CYP2C19, potentially increasing levels of drugs like clopidogrel (though clinical significance is debated and often not clinically significant with pantoprazole compared to other PPIs).
## Monitoring
* Monitor for symptoms of GERD or erosive esophagitis.
* Monitor magnesium levels periodically, especially with prolonged use (typically > 3 months, more likely after 1 year).
* Monitor for signs and symptoms of bone fractures.
* Monitor for diarrhea, especially if suggestive of *C. difficile*.
## Clinical Pearls
* Administer 30-60 minutes before a meal for optimal efficacy.
* Swallow delayed-release capsules or tablets whole; do not chew or crush.
* IV formulation is available for patients unable to take oral medications.
* Consider the risks and benefits of long-term PPI use, especially in patients requiring extended therapy.
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**Disclaimer:** This information is intended for healthcare professionals and is not a substitute for professional medical advice. Always verify current prescribing information and consult with a qualified healthcare provider for any medical concerns or before making any treatment decisions.
