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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Erosive esophagitis associated with GERD
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* Gastroesophageal reflux disease (GERD)
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks. A further 8 weeks may be considered.
* **GERD (symptomatic relief):** 20 mg orally once daily. For healing erosive esophagitis, 40 mg orally once daily.
* **Pathological hypersecretory conditions:** Starting dose is 40 mg orally or intravenously twice daily. Doses may be increased as needed. Usual doses range from 40 mg twice daily to 220 mg daily. Maximum dose: 240 mg/day.
## Pediatric Dosing
* **GERD (age 5 years and older):** 20 mg orally once daily for up to 4 weeks.
* **Erosive esophagitis (age 5 years and older):** 40 mg orally once daily for up to 8 weeks.
* **Note:** Dosing for younger children or for pathological hypersecretory conditions is not well established and requires careful consideration.
## Dose Adjustments
No dose adjustment is typically needed for hepatic or renal impairment.
## Contraindications
* Known hypersensitivity to pantoprazole, its components, or other benzimidazoles.
## Adverse Effects
* Common: Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
* Serious: Fundic gland polyps, Clostridium difficile-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency, potential for lupus erythematosus.
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** Antiretrovirals (e.g., rilpivirine, atazanavir), antifungals (e.g., ketoconazole, itraconazole). Pantoprazole can decrease absorption.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Consider interactions with drugs like clopidogrel (reduced efficacy), although clinical significance is debated.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., muscle cramps, seizures, arrhythmias).
* Long-term use: Consider monitoring magnesium levels, vitamin B12 levels, and bone mineral density.
* Monitor for signs of C. difficile infection.
## Clinical Pearls
* Administer oral pantoprazole at least 30 minutes before a meal.
* Intravenous administration should be done over at least 2 minutes.
* Long-term PPI use is associated with increased risk of fractures, C. difficile infection, and hypomagnesemia. Use the lowest effective dose for the shortest duration necessary.
**Disclaimer:** This information is intended for clinical use and does not replace comprehensive drug references. Always verify current prescribing information and guidelines before initiating or modifying therapy.
