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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 orally once daily.
* **Pathological hypersecretory conditions:** 40 mg orally or intravenously twice daily. Doses may be increased to 80 mg intravenously or orally twice daily as needed.
### Pediatric Dosing
* **Erosive esophagitis (GERD-associated):**
* **1 to 5 years:** 20 mg orally once daily.
* **5 to 16 years:** 40 mg orally once daily.
* Dosing duration typically 8 weeks.
### Dose Adjustments
* **Hepatic Impairment:** Maximum dose of 40 mg orally or intravenously once daily.
* **Renal Impairment:** No dose adjustment typically needed.
### Contraindications
* Known hypersensitivity to pantoprazole, other PPIs, or any component of the formulation.
### Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, vomiting, dizziness, fatigue.
* **Serious:** Clostridium difficile-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, lupus erythematosus, vitamin B12 deficiency.
### Key Drug Interactions
* **Drugs dependent on gastric pH for absorption:** Ketoconazole, itraconazole, posaconazole, erlotinib, mycophenolate mofetil. Separate administration times.
* **Methotrexate:** PPIs may increase methotrexate levels. Consider dose reduction or interruption of pantoprazole.
* **CYP2C19 substrates:** Clopidogrel (though clinical significance is debated).
### Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., muscle cramps, seizures, tremors).
* Monitor for signs of C. difficile infection.
* Consider monitoring magnesium levels in patients on long-term therapy or taking concomitant medications known to lower magnesium.
### Clinical Pearls
* Oral pantoprazole should be taken at least 1 hour before a meal.
* For intravenous administration, reconstitute and infuse as directed by the manufacturer.
* Long-term PPI use is associated with increased risk of fractures, C. difficile infection, and hypomagnesemia.
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**Disclaimer:** This information is intended for clinical professionals. Always consult the most current prescribing information and relevant guidelines for complete details and to confirm accuracy before making any treatment decisions.
