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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Healing of erosive esophagitis
* Treatment of gastroesophageal reflux disease (GERD)
* Treatment of pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* Part of a multi-drug regimen for *Helicobacter pylori* eradication
## Adult Dosing
* **Erosive Esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **GERD:** 20 mg to 40 mg orally once daily. For symptom relief, 20 mg daily may be sufficient. For healing, 40 mg daily.
* **Pathological Hypersecretory Conditions:** Starting dose is 40 mg orally or intravenously twice daily. Doses can be increased as clinically needed. Usual doses range from 40 mg to 240 mg daily. Doses exceeding 120 mg daily should be divided and administered every 12 hours.
* ***H. pylori* Eradication:** 40 mg orally twice daily as part of a specific multi-drug regimen (e.g., with antibiotics like clarithromycin and amoxicillin, or metronidazole).
## Pediatric Dosing
* **GERD (1 month to 16 years):**
* Oral: 10 mg orally once daily for children weighing 5 kg to <40 kg; 20 mg orally once daily for children weighing ≥40 kg.
* Intravenous: 0.5 mg/kg to 1 mg/kg (maximum 40 mg) intravenously once daily.
* **Erosive Esophagitis (5 years to 16 years):**
* Oral: 40 mg orally once daily for 8 weeks.
*Note: Dosing in neonates and infants under 1 month for GERD is not well established and should be individualized based on clinical response.*
## Dose Adjustments
No dose adjustment is typically required for renal impairment. In severe hepatic impairment, the maximum daily dose should not exceed 20 mg orally or 40 mg intravenously once daily.
## Contraindications
Hypersensitivity to pantoprazole, substituted benzimidazoles, or any component of the formulation.
## Adverse Effects
Common: Diarrhea, headache, dizziness, nausea, abdominal pain.
Long-term use may be associated with: Vitamin B12 deficiency, hypomagnesemia, increased risk of *Clostridium difficile*-associated diarrhea, bone fractures (hip, wrist, spine).
## Key Drug Interactions
* **Drugs requiring gastric pH for absorption:** May decrease absorption of drugs like ketoconazole, itraconazole, iron salts, and ritonavir.
* **Methotrexate:** PPIs may increase methotrexate levels. Consider pausing pantoprazole if high-dose methotrexate is used.
* **CYP2C19 Substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. May affect metabolism of drugs like clopidogrel (though clinical significance is debated).
## Monitoring
* Monitor for signs and symptoms of *C. difficile* infection.
* Monitor magnesium levels, especially in patients on long-term therapy or concomitant diuretic use.
* Assess for bone fracture risk in patients with osteoporosis risk factors.
* Consider Vitamin B12 level monitoring with prolonged use.
## Clinical Pearls
* Administer oral pantoprazole at least 30 minutes before a meal.
* Intravenous formulation should be administered as a slow infusion over 15 minutes.
* Do not crush or chew delayed-release tablets.
* Long-term PPI use is associated with potential risks; consider the lowest effective dose for the shortest duration necessary.
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***Disclaimer:** This information is intended for clinical use and does not replace professional judgment. Always consult the most current prescribing information for complete details and to verify dosages based on patient-specific factors and local protocols.*
