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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Gastroesophageal reflux disease (GERD)
* Healing of erosive esophagitis
* Prevention of NSAID-induced gastric ulcers
* Treatment of H. pylori infection (in combination regimens)
* Zollinger-Ellison syndrome
## Adult Dosing
* **GERD and Erosive Esophagitis:** 40 mg orally or intravenously once daily. May be increased to 40 mg twice daily for severe esophagitis.
* **H. pylori Eradication:** 40 mg orally twice daily for 7-14 days as part of a multi-drug regimen.
* **NSAID Ulcer Prophylaxis:** 40 mg orally once daily.
* **Zollinger-Ellison Syndrome:** Starting dose is 40 mg orally or intravenously twice daily. Doses may be adjusted based on gastric acid output; doses up to 240 mg daily have been administered (divided every 8 hours).
## Pediatric Dosing
* **GERD and Erosive Esophagitis (12 years and older):** 40 mg orally once daily.
* **GERD (5 to <12 years):** 20 mg orally once daily. May increase to 40 mg once daily if needed.
* **Erosive Esophagitis (2 to <12 years):** Dosing is based on weight:
* 15 kg to <40 kg: 20 mg orally once daily.
* ≥40 kg: 40 mg orally once daily.
*Note: Intravenous dosing in pediatric patients is not well-established and typically reserved for situations where oral administration is not feasible.*
## Dose Adjustments
No dose adjustment is typically required for hepatic or renal impairment. However, caution may be advised in severe hepatic impairment.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
* **Serious:** *Clostridium difficile*-associated diarrhea, bone fracture (hip, wrist, spine) with prolonged use, hypomagnesemia (symptomatic or asymptomatic), fundic gland polyps.
## Key Drug Interactions
* **Certain Antiretrovirals:** Reduced absorption of drugs like atazanavir and nelfinavir due to increased gastric pH.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **Drugs Dependent on Gastric pH for Absorption:** Clopidogrel, ketoconazole, itraconazole, iron salts.
## Monitoring
* Magnesium levels, especially with prolonged therapy (>3 months) or concurrent diuretic use.
* Bone mineral density should be considered in patients at risk for osteoporosis with long-term therapy.
* Monitor for signs and symptoms of *C. difficile*-associated diarrhea.
## Clinical Pearls
* Administer pantoprazole 30-60 minutes before a meal.
* Delayed-release tablets should be swallowed whole and not chewed or crushed.
* IV formulation should be reconstituted and infused over 15 minutes.
* Long-term PPI use is associated with an increased risk of bone fractures, *C. difficile* infection, hypomagnesemia, and vitamin B12 deficiency. Consider the shortest duration of therapy appropriate to the condition being treated.
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**Disclaimer:** This information is intended for healthcare professionals. Always verify current prescribing information and consult relevant guidelines before making clinical decisions.
