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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
* Reduction of risk of NSAID-associated gastric ulcers in patients at risk
* Pathological hypersecretory conditions, including Zollinger-Ellison syndrome
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing:** 40 mg orally once daily. May consider 20 mg orally once daily.
* **NSAID-associated ulcers:** 40 mg orally once daily.
* **Pathological hypersecretory conditions:** Starting dose 40 mg orally or intravenously twice daily. Doses can be increased to 240 mg daily.
## Pediatric Dosing
* **1 year and older (GERD):** 10 mg to 20 mg orally once daily.
* **5 years and older (GERD):** 20 mg to 40 mg orally once daily.
* **Intravenous dosing in pediatrics is not well-established and requires specialist consultation.**
## Dose Adjustments
No specific dose adjustments are recommended for hepatic or renal impairment. However, caution may be warranted in severe hepatic impairment.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
* Use of rilpivirine-containing products.
## Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, dizziness.
Less common: Rash, pruritus, elevated liver enzymes, flatulence.
Serious: *Clostridioides difficile*-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency, systemic lupus erythematosus, fundic gland polyps.
## Key Drug Interactions
* **CYP2C19 substrates:** May increase levels of drugs like clopidogrel, phenytoin, and methotrexate.
* **Drugs dependent on gastric pH:** Ketoconazole, itraconazole, ampicillin esters, iron salts, vitamin B12.
* **Methotrexate:** May increase methotrexate levels.
* **Rilpivirine:** Coadministration is contraindicated.
* **Voriconazole:** May increase pantoprazole levels.
## Monitoring
* Monitor for signs and symptoms of *C. difficile*-associated diarrhea.
* Consider magnesium levels periodically, especially with prolonged use (>3 months).
* Monitor for signs of bone fractures with long-term therapy.
* Assess for B12 deficiency symptoms with long-term therapy.
## Clinical Pearls
* Administer oral pantoprazole 30 minutes before a meal.
* For intravenous administration, reconstitute and infuse according to manufacturer instructions.
* Long-term use of PPIs can be associated with increased risk of bone fractures, *C. difficile* infection, and vitamin B12 deficiency. Consider the lowest effective dose for the shortest duration necessary.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant clinical guidelines before making treatment decisions. This document does not replace clinical judgment.
