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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:** 40 mg orally 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 twice daily, but may be increased as determined by gastric acid output. Doses can be up to 240 mg daily.
## Pediatric Dosing
* **Erosive esophagitis (5 to 16 years):** 40 mg orally once daily for up to 8 weeks.
* **GERD symptoms (in patients without erosive esophagitis, 5 to 16 years):** 20 mg orally once daily for up to 8 weeks.
* Dosing for children under 5 years is not established.
## Dose Adjustments
* **Hepatic impairment:** Maximum dose of 40 mg once daily.
* **Renal impairment:** No dose adjustment is typically required.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
Long-term use: Increased risk of *Clostridium difficile*-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency.
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** PPIs can decrease absorption (e.g., certain antifungals like ketoconazole, itraconazole; some HIV medications like rilpivirine, atazanavir).
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole can inhibit CYP2C19, potentially increasing levels of drugs metabolized by this enzyme (e.g., clopidogrel, citalopram, warfarin).
## Monitoring
* Electrolytes (especially magnesium) with prolonged use.
* Bone mineral density with prolonged use, particularly in patients with risk factors for osteoporosis.
* Signs and symptoms of *Clostridium difficile* infection.
* Consider vitamin B12 levels with prolonged therapy.
## Clinical Pearls
* Administer pantoprazole 30 minutes before a meal.
* Do not crush or chew delayed-release formulations.
* Long-term PPI use is associated with risks and should be periodically reassessed.
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*This information is intended for healthcare professionals and is not a substitute for current prescribing information. Always consult the official prescribing information and relevant clinical guidelines for complete details before making any treatment decisions.*
