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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
* **Healing of Erosive Esophagitis:** 40 mg orally once daily for up to 8 weeks.
* **Maintenance of Healing of Erosive Esophagitis:** 40 mg orally once daily. Some patients may be treated with 20 mg orally once daily.
* **Pathological Hypersecretory Conditions (e.g., Zollinger-Ellison Syndrome):** Doses range from 40 mg orally once daily up to a maximum of 80 mg intravenously every 8 hours or 40 mg intravenously twice daily. Individualized dosing is required.
## Pediatric Dosing
* **Age 5 years and older:**
* **Erosive Esophagitis:** 40 mg orally once daily for up to 8 weeks.
* **GERD Symptomatic Treatment:** 20 mg orally once daily for up to 8 weeks.
* Dosing for younger pediatric patients is not well established.
## Dose Adjustments
* **Hepatic Impairment:** Maximum dose of 40 mg orally once daily.
* **Renal Impairment:** No dose adjustment necessary for oral formulations.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, flatulence, vomiting, dizziness, arthralgia.
* **Serious:** *Clostridioides difficile*-associated diarrhea, bone fractures (hip, wrist, spine) with long-term use, hypomagnesemia (can be severe, leading to tetany, seizures, arrhythmias), vitamin B12 deficiency, fundic gland polyps.
## Key Drug Interactions
* **Drugs Dependent on Gastric pH for Absorption:** Ketoconazole, itraconazole, posaconazole, iron salts, cyanocobalamin, mycophenolate mofetil. Pantoprazole may decrease absorption.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **CYP2C19 Substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Monitor for increased concentrations of drugs like clopidogrel.
## Monitoring
* Monitor for signs and symptoms of *Clostridioides difficile*-associated diarrhea.
* Consider monitoring serum magnesium levels in patients on long-term therapy (typically >1 year) or those taking concomitant medications known to lower magnesium (e.g., diuretics).
* Monitor for signs of bone fracture.
* Monitor for vitamin B12 deficiency symptoms with prolonged use.
## Clinical Pearls
* Administer pantoprazole orally 30-60 minutes before a meal.
* For intravenous administration, reconstitute and dilute according to manufacturer instructions.
* Long-term use of PPIs is associated with an increased risk of certain adverse events. Consider the lowest effective dose for the shortest duration needed.
* Parenteral formulations are generally reserved for patients unable to take oral medications.
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**Disclaimer:** This information is intended for educational purposes and does not substitute for professional medical advice. Always consult the most current prescribing information and your healthcare provider for accurate and complete drug information.
