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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.
* Treatment of pathological hypersecretory conditions, including Zollinger-Ellison syndrome.
## Adult Dosing
* **Erosive esophagitis healing:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing:** 40 mg orally once daily.
* **Pathological hypersecretory conditions:** Starting dose is typically 40 mg orally or intravenously twice daily, with subsequent titration based on gastric acid output. Doses may exceed 160 mg daily; for doses greater than 80 mg, divide the dose and administer over 2 hours intravenously.
## Pediatric Dosing
Dosing in pediatric patients varies by indication and age. Consult specific pediatric guidelines. For example:
* **Erosive esophagitis (ages 5-16 years):** 20-40 mg orally once daily.
## Dose Adjustments
* **Hepatic Impairment:** Maximum daily dose of 40 mg orally.
* **Renal Impairment:** No dose adjustment is typically required.
## Contraindications
* Known hypersensitivity to pantoprazole 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 an increased risk of:
* Fractures (hip, wrist, spine)
* Clostridium difficile infection
* Vitamin B12 deficiency
* Hypomagnesemia
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** PPIs can decrease absorption of drugs like ketoconazole, itraconazole, and certain HIV protease inhibitors.
* **Methotrexate:** Concomitant use may increase methotrexate levels and toxicity.
* **CYP2C19 substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Caution is advised with drugs like clopidogrel, although clinical significance is debated.
## Monitoring
* Monitor for signs and symptoms of C. difficile infection.
* Monitor serum magnesium levels periodically, especially with prolonged therapy.
* Monitor bone mineral density if clinically indicated.
## Clinical Pearls
* Pantoprazole is often administered 30-60 minutes before a meal.
* Intravenous administration should be infused over 2-5 minutes or as a continuous infusion for higher doses.
* Discontinuation should be considered gradually if long-term use is no longer indicated to minimize rebound acid hypersecretion.
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*Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant clinical guidelines for definitive guidance.*
