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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.
### 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 once daily.
* **Pathological Hypersecretory Conditions:** 40 mg orally or intravenously twice daily. Doses may be increased as needed. Doses up to 240 mg daily have been administered intravenously.
### Pediatric Dosing
* **Erosive Esophagitis (5-16 years):** 40 mg orally once daily for up to 4 weeks.
* **GERD (5-16 years):** 20 mg orally once daily for up to 8 weeks.
* **Note:** Dosing for pediatric patients may vary based on weight and specific indication. Consult current guidelines.
### Dose Adjustments
* **Hepatic Impairment:** For severe hepatic impairment, a dose of 20 mg orally once daily is recommended.
### Contraindications
* Known hypersensitivity to pantoprazole, its components, or other substituted benzimidazoles.
### Adverse Effects
Common adverse effects include headache, diarrhea, nausea, abdominal pain, vomiting, dizziness, and arthralgia. Long-term use of PPIs may be associated with an increased risk of *Clostridium difficile*-associated diarrhea, bone fractures, hypomagnesemia, and vitamin B12 deficiency.
### Key Drug Interactions
* **Drugs Dependent on Gastric pH for Absorption:** Pantoprazole can decrease absorption of drugs like ketoconazole, itraconazole, and atazanavir.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **CYP2C19 Substrates:** Pantoprazole is a moderate inhibitor of CYP2C19 and may affect metabolism of drugs like clopidogrel.
### Monitoring
* Monitor for signs and symptoms of *Clostridium difficile* infection.
* Consider monitoring serum magnesium levels, especially with prolonged use or concomitant use of other medications that lower magnesium.
* Monitor for bone fractures, particularly in patients with risk factors.
### Clinical Pearls
* Pantoprazole is available as oral tablets, oral suspension, and intravenous formulations.
* Administer oral pantoprazole 30-60 minutes before a meal.
* If administering oral pantoprazole suspension via nasogastric tube, use an acid-resistant tube to prevent clogging.
* Long-term PPI therapy should be re-evaluated regularly to determine the lowest effective dose or the need for discontinuation.
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*Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and institutional protocols before administering any medication.*
