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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Erosive esophagitis associated with gastroesophageal reflux disease (GERD).
* Maintenance of healing of erosive esophagitis.
* Pathological hypersecretory conditions, including 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. Some patients may be treated with 20 mg orally once daily.
* **Pathological hypersecretory conditions:** Start with 40 mg orally or intravenously twice daily. Doses may be increased as clinically indicated. Doses up to 240 mg intravenously daily have been administered.
## Pediatric Dosing
* **12 years and older:**
* **Erosive esophagitis:** 40 mg orally once daily for up to 8 weeks.
* **GERD (symptomatic):** 20 mg orally once daily for up to 8 weeks.
## Dose Adjustments
No dose adjustment is typically needed for hepatic or renal impairment, although caution may be advised in severe hepatic impairment.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
Common adverse effects include headache, diarrhea, nausea, abdominal pain, vomiting, dizziness, and flatulence. Long-term use of PPIs may be associated with an increased risk of fractures, Clostridium difficile infection, hypomagnesemia, and vitamin B12 deficiency.
## Key Drug Interactions
* **Drugs Dependent on Gastric pH:** May decrease absorption of drugs where gastric pH is critical for absorption (e.g., ketoconazole, itraconazole, posaconazole, iron salts, vitamin B12).
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **CYP2C19 Substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. May affect metabolism of drugs like clopidogrel, though clinical significance is debated.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., muscle cramps, seizures, arrhythmias) with prolonged use.
* Consider monitoring vitamin B12 levels with long-term therapy.
* Monitor for signs of fracture with long-term therapy.
## Clinical Pearls
* Administer oral pantoprazole 30 minutes before a meal.
* Intravenous administration requires reconstitution and further dilution.
* IV to PO switch can be made when clinically appropriate.
* The 20 mg dose is typically used for maintenance or less severe GERD symptoms.
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**Disclaimer:** This information is for educational purposes only and does not substitute for professional medical advice. Always consult with a qualified healthcare provider to determine the best course of treatment for your specific condition. Verify current prescribing information from the product's official labeling and relevant clinical guidelines before making any treatment decisions.
