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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, including Zollinger-Ellison syndrome (ZES).
## Adult Dosing
* **Healing of erosive esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing of erosive esophagitis:** 40 mg orally once daily. For some patients, 20 mg orally once daily may be sufficient.
* **Pathological hypersecretory conditions (ZES):** 40 mg orally or intravenously twice daily. Doses may be increased to 80 mg intravenously or orally every 8 hours. The maximum recommended dose is 240 mg per day.
## Pediatric Dosing
* **Erosive esophagitis (age 5 to 16 years):** 20 mg or 40 mg orally once daily for up to 4 weeks.
*Note: Dosing for pediatric patients beyond these indications or age groups is not well established.*
## Dose Adjustments
* **Hepatic impairment:** Maximum daily dose of 40 mg orally or intravenously.
* **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, flatulence.
* **Serious:** Fundic gland polyps (long-term use), *Clostridioides difficile*-associated diarrhea, bone fractures (hip, wrist, spine) with prolonged use, hypomagnesemia, vitamin B12 deficiency, systemic lupus erythematosus.
## Key Drug Interactions
* **Warfarin:** Monitor INR closely.
* **Methotrexate:** May increase methotrexate levels.
* **Drugs requiring gastric acid for absorption (e.g., ketoconazole, itraconazole, certain antiretrovirals):** May decrease absorption.
* **CYP2C19 substrates (e.g., clopidogrel):** Pantoprazole may decrease the efficacy of clopidogrel.
## Monitoring
* Magnesium levels in patients on long-term therapy or taking concomitant medications that may cause hypomagnesemia (e.g., diuretics).
* Bone mineral density screening in patients at risk for osteoporosis.
* Clinical signs and symptoms of vitamin B12 deficiency.
## Clinical Pearls
* Administer oral pantoprazole 30-60 minutes before a meal.
* Intravenous administration is generally reserved for patients unable to take oral medications.
* Long-term PPI use has been associated with increased risks of fractures, C. difficile infection, and nutrient deficiencies. Consider the risks versus benefits for long-term therapy.
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*Disclaimer: This information is intended for clinical professionals and is not a substitute for professional medical advice. Always verify current prescribing information with the official product monograph or other authoritative sources.*
