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## Pantoprazole
### Overview
Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid production.
### Primary Indications
* Erosive esophagitis associated with GERD
* Healing of erosive esophagitis
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* H. pylori eradication (in combination regimens)
### Adult Dosing
* **Erosive esophagitis healing:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **GERD maintenance:** 20 mg to 40 mg orally once daily.
* **Pathological hypersecretory conditions:** Start at 40 mg orally or intravenously twice daily. Doses can be increased as clinically indicated. Usual dosage range is 40 mg to 80 mg daily, divided into two doses. Maximum dose is 80 mg intravenously every 8 hours.
### Pediatric Dosing
* **Erosive esophagitis healing (age 5 to 15 years):** 20 mg to 40 mg orally once daily for up to 8 weeks. Dosing is typically based on weight and clinical response.
* *Note: Dosing for younger pediatric patients or other indications is less established and requires careful consideration of available data and clinical judgment.*
### Dose Adjustments
* **Hepatic Impairment:** Maximum dose of 40 mg orally or 20 mg intravenously once daily.
* **Renal Impairment:** No dose adjustment generally needed.
### Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
### Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, dizziness, flatulence.
Less Common/Serious: Clostridium difficile-associated diarrhea, bone fracture (hip, wrist, spine) with prolonged use, hypomagnesemia (can be severe and symptomatic), vitamin B12 deficiency with prolonged use, lupus erythematosus cutaneus subaevis.
### Key Drug Interactions
* **Drugs Dependent on Gastric pH for Absorption:** May decrease absorption of drugs like ketoconazole, itraconazole, and certain antiretrovirals. Conversely, may increase absorption of drugs like digoxin.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **CYP2C19 Substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Caution with drugs metabolized by this enzyme (e.g., clopidogrel, citalopram).
### Monitoring
* Electrolytes (especially magnesium) with prolonged therapy or in patients on diuretics.
* Bone mineral density in patients at risk for osteoporosis with long-term use.
* Clinical response for the treated indication.
### Clinical Pearls
* Administer oral pantoprazole 30 minutes before a meal.
* Intravenous administration is an option when oral route is not feasible. Reconstitute and dilute as per manufacturer's instructions.
* Consider vitamin B12 and magnesium supplementation for patients on long-term PPI therapy.
* H. pylori eradication regimens are typically 7-14 days.
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*This information is intended for healthcare professionals. Always consult the official prescribing information and relevant clinical guidelines for the most up-to-date and comprehensive details before making any prescribing decisions.*
