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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid production.
## Primary Indications
* Gastroesophageal reflux disease (GERD)
* Healing of erosive esophagitis
* Treatment of pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* H. pylori eradication (in combination with antibiotics)
## Adult Dosing
* **GERD/Erosive Esophagitis:** 40 mg once daily for up to 8 weeks. For maintenance therapy, 40 mg once daily may be used; some patients may be managed on 20 mg once daily.
* **Hypersecretory Conditions:** 40 mg twice daily, adjusted as needed. Doses up to 240 mg daily have been used.
* **H. pylori Eradication:** 40 mg twice daily in combination with amoxicillin 1000 mg twice daily and clarithromycin 500 mg twice daily for 7-14 days.
## Pediatric Dosing
* **GERD/Erosive Esophagitis:**
* **12 years and older:** 40 mg once daily for up to 8 weeks.
* **5-11 years:** 20 mg once daily for up to 8 weeks.
* **Less than 5 years:** Efficacy and safety not established by FDA for these age groups. Dosing may vary based on institutional protocols and clinical judgment.
## Dose Adjustments
* **Hepatic Impairment:** Maximum dose is 40 mg once daily.
## Contraindications
* Hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
* Common: Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
* Serious: Long-term use may be associated with an increased risk of bone fractures (hip, wrist, spine), Clostridium difficile infection, hypomagnesemia, and vitamin B12 deficiency.
## Key Drug Interactions
* **Drugs dependent on gastric pH for absorption:** Ketoconazole, itraconazole, posaconazole, erlotinib, nelfinavir, atazanavir. Pantoprazole can decrease absorption.
* **Methotrexate:** PPIs may increase methotrexate levels. Consider temporary discontinuation of pantoprazole.
* **CYP2C19 substrates:** May affect metabolism of drugs like clopidogrel, although clinical significance is debated.
## Monitoring
* Magnesium levels, especially in patients on long-term therapy or taking concomitant diuretics.
* Bone mineral density in patients at risk for osteoporosis.
* Clinical signs and symptoms of C. difficile infection.
* Vitamin B12 levels in patients on long-term therapy.
## Clinical Pearls
* Administer 30-60 minutes before a meal.
* Delayed-release tablets should be swallowed whole and not crushed, chewed, or broken.
* Intravenous formulation is available for patients unable to take oral medication.
**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and institutional guidelines for definitive patient care decisions.
