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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Erosive esophagitis associated with gastroesophageal reflux disease (GERD)
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* Maintenance of healing of erosive esophagitis
* Treatment of GERD symptoms
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing:** 40 mg orally once daily. Some patients may be treated with 20 mg orally once daily.
* **GERD symptoms:** 20 mg or 40 mg orally once daily.
* **Pathological hypersecretory conditions:** Initial dose of 40 mg orally or intravenously once daily. Doses may be titrated upward. Doses up to 240 mg daily have been administered intravenously in divided doses.
*Maximum intravenous dose:* 96 mg every 24 hours.
## Pediatric Dosing
* **1 year and older:**
* **Erosive esophagitis:** 1.0 mg/kg to 2.0 mg/kg orally once daily, not to exceed 40 mg daily. Duration typically 8 weeks.
* **GERD symptoms:** 1.0 mg/kg to 2.0 mg/kg orally once daily, not to exceed 40 mg daily.
*Dosing for children under 1 year is not well established.*
## Dose Adjustments
No dose adjustment is typically required for hepatic or renal impairment in adults.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
Common: Diarrhea, headache, abdominal pain, nausea, dizziness.
Long-term use may be associated with:
* Bone fractures (hip, wrist, spine)
* Clostridium difficile infection
* Vitamin B12 deficiency
* Hypomagnesemia (potentially severe)
* Diverticulitis
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** Ketoconazole, itraconazole, iron salts, ampicillin esters, erlotinib, mycophenolate mofetil. Pantoprazole can decrease absorption.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole may inhibit CYP2C19, potentially increasing concentrations of drugs metabolized by this enzyme (e.g., clopidogrel, citalopram, warfarin).
## Monitoring
* Electrolytes (especially magnesium) with prolonged use.
* Bone mineral density with long-term therapy.
* For signs and symptoms of C. difficile infection.
## Clinical Pearls
* Administer oral pantoprazole 30 minutes before a meal.
* Intravenous pantoprazole should be administered as a slow infusion over at least 2 minutes.
* Consider the risks associated with long-term PPI use.
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*Disclaimer: This information is intended for clinical use and does not replace professional medical judgment. Always consult the most current prescribing information and institutional protocols.*
