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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that decreases the amount of acid produced in the stomach. It is available in oral and intravenous formulations.
## Primary Indications
* Healing of erosive esophagitis associated with gastroesophageal reflux disease (GERD)
* Maintenance of healing of erosive esophagitis
* Treatment of pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* H. pylori eradication (in combination with antibiotics)
## Adult Dosing
* **Erosive Esophagitis:** 40 mg orally or IV 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.
* **Pathological Hypersecretory Conditions:** Starting dose is typically 40 mg orally or IV twice daily. Doses may be adjusted based on clinical response, with doses up to 240 mg daily have been administered.
* **H. pylori Eradication:** 40 mg orally twice daily for 7-14 days in combination with amoxicillin 1 gram orally twice daily and clarithromycin 500 mg orally twice daily.
## Pediatric Dosing
* **GERD (Erosive Esophagitis):**
* **12 to 17 years:** 40 mg orally once daily for up to 8 weeks.
* **5 to 11 years:** 20 mg orally once daily for up to 8 weeks. Dosing may be adjusted to 40 mg orally once daily if needed.
* **Less than 5 years:** Efficacy and safety not established. Data is limited. Dosing may be based on local protocol and clinical judgment, often starting at 0.5 to 1 mg/kg/day.
## Dose Adjustments
No dose adjustment is generally required for hepatic or renal impairment.
## Contraindications
* Known hypersensitivity to pantoprazole, substituted benzimidazoles, or any component of the formulation.
## Adverse Effects
Common adverse effects include headache, diarrhea, nausea, abdominal pain, vomiting, dizziness, and flatulence. Long-term use may be associated with increased risk of:
* Bone fractures (hip, wrist, spine)
* Clostridium difficile infection
* Vitamin B12 deficiency
* Hypomagnesemia
## Key Drug Interactions
* **Drugs affected by gastric pH:** Absorption of drugs requiring acidic gastric pH for absorption may be decreased (e.g., ketoconazole, itraconazole, certain HIV protease inhibitors).
* **CYP2C19 substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Caution may be warranted with concomitant use of drugs primarily metabolized by CYP2C19 (e.g., clopidogrel, voriconazole).
## Monitoring
* Monitor for signs and symptoms of Clostridium difficile-associated diarrhea.
* Monitor serum magnesium levels periodically, especially with prolonged use (typically >1 year).
* Assess for bone fracture risk with long-term therapy.
* Monitor for signs of vitamin B12 deficiency.
## Clinical Pearls
* Administer IV pantoprazole over at least 2 minutes.
* Oral pantoprazole is generally taken once daily before a meal.
* If a dose is missed, take it as soon as remembered, but skip the missed dose if it is almost time for the next scheduled dose. Do not double doses.
* Long-term use should be re-evaluated regularly to determine the continued need for acid suppression.
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*Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and institutional guidelines for complete and up-to-date details.*
