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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.
* Pathological hypersecretory conditions, such as 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. For patients healed of erosive esophagitis, the maintenance dose of 20 mg orally once daily may be adequate.
* **Pathological Hypersecretory Conditions:** Starting dose is 40 mg orally or intravenously twice daily. Doses may be increased to 240 mg daily divided into four doses.
## Pediatric Dosing
* **GERD and Erosive Esophagitis (12 years and older):** 40 mg orally once daily for up to 4 weeks.
*Note: Dosing for pediatric patients younger than 12 years is not well-established and should be individualized.*
## Dose Adjustments
* **Hepatic Impairment:** Maximum dose of 40 mg orally once daily. IV formulation not recommended.
* **Renal Impairment:** No dose adjustment necessary.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, dizziness.
* **Serious:**
* Clostridium difficile-associated diarrhea.
* Bone fracture (hip, wrist, spine) with long-term, high-dose use.
* Hypomagnesemia (can be asymptomatic or present with tetany, seizures, tremors, arrhythmias).
* Vitamin B12 deficiency with long-term use.
* Fundic gland polyps.
## Key Drug Interactions
* **Certain Antiretrovirals (e.g., nelfinavir, rilpivirine):** Pantoprazole can decrease their absorption.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 Substrates (e.g., clopidogrel):** Pantoprazole may reduce the efficacy of clopidogrel.
* **Iron Supplements:** PPIs can decrease iron absorption.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia, especially with prolonged use (>1 year).
* Monitor for signs of fractures.
* Monitor for Vitamin B12 deficiency with prolonged use.
## Clinical Pearls
* Administer pantoprazole orally 30 minutes before a meal.
* IV administration may be used when oral administration is not feasible.
* Long-term use of PPIs should be reserved for patients who require it.
* Consider the lowest effective dose for maintenance therapy.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant clinical guidelines for complete and up-to-date guidance.
