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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that reduces stomach acid production.
## Primary Indications
* Gastroesophageal reflux disease (GERD)
* Erosive esophagitis
* Healing of duodenal ulcers
* Zollinger-Ellison syndrome
## Adult Dosing
* **GERD/Erosive Esophagitis:** 40 mg orally once daily for up to 8 weeks. Maintenance therapy: 20-40 mg once daily.
* **Duodenal Ulcer Healing:** 40 mg orally once daily for up to 4 weeks.
* **Zollinger-Ellison Syndrome:** 40 mg orally twice daily, may be increased as needed. Doses up to 80 mg twice daily have been used.
* **IV Administration:** 40 mg once daily for up to 7 days for patients unable to take oral therapy.
## Pediatric Dosing
* **GERD/Erosive Esophagitis:**
* **1-5 years (≥10 kg):** 20 mg once daily.
* **5-12 years:** 20-40 mg once daily.
* **12-16 years:** 40 mg once daily.
* Dosing for children < 1 year is not well established and generally not recommended.
## Dose Adjustments
* No dose adjustment is typically required for hepatic or renal impairment, although caution may be advised in severe hepatic impairment.
## Contraindications
* Hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, flatulence.
* **Serious:** *Clostridium difficile*-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia (can be severe), vitamin B12 deficiency, fundic gland polyps.
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** Antiretrovirals (e.g., rilpivirine), antifungals (e.g., ketoconazole, itraconazole), iron salts. Absorption may be decreased.
* **Methotrexate:** Pantoprazole may increase methotrexate levels.
* **CYP2C19 substrates:** May alter levels of drugs metabolized by this enzyme.
## Monitoring
* Monitor for signs and symptoms of *C. difficile* infection.
* Monitor magnesium levels, especially with prolonged use (>3 months).
* Monitor bone mineral density in patients at risk for osteoporosis.
* Monitor for signs of vitamin B12 deficiency with long-term therapy.
## Clinical Pearls
* Administer oral pantoprazole at least 1 hour before a meal.
* IV pantoprazole is a sodium-containing product; consider in patients requiring sodium restriction.
* Long-term PPI use can increase the risk of fracture, *C. difficile* infection, and hypomagnesemia. Use the lowest effective dose for the shortest duration necessary.
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**Disclaimer:** This information is intended for clinical use and is not a substitute for professional medical advice. Always consult the most current prescribing information and relevant guidelines before making any treatment decisions.
