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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
* Reduction of risk for NSAID-associated gastric ulcers
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
## Adult Dosing
* **GERD & Erosive Esophagitis:** 40 mg once daily. Duration varies, typically 4-8 weeks for erosive esophagitis.
* **NSAID-induced Ulcer Prophylaxis:** 20 mg once daily.
* **Pathological Hypersecretory Conditions:** Starting dose 40 mg twice daily, may increase to 80 mg twice daily or higher based on response.
## Pediatric Dosing
* **GERD (Erosive Esophagitis):**
* **5 to 11 years:** 20 mg once daily for up to 8 weeks.
* **12 to 17 years:** 40 mg once daily for up to 8 weeks.
* **GERD (Symptomatic, non-erosive):** Dosing is not well-established and may be guided by local protocol.
## Dose Adjustments
No dose adjustment is typically needed for renal impairment. For hepatic impairment, consider reducing the dose (e.g., 20 mg daily).
## Contraindications
Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, dizziness.
Serious: *Clostridioides difficile*-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency, potential for fundic gland polyps with long-term use.
## Key Drug Interactions
* **CYP2C19 substrates:** May increase concentrations of drugs metabolized by this enzyme (e.g., clopidogrel - reduced antiplatelet effect, citalopram, sertraline).
* **Drugs requiring gastric acid for absorption:** May decrease absorption (e.g., ketoconazole, itraconazole, iron salts, vitamin B12).
* **Methotrexate:** PPIs may increase methotrexate levels.
## Monitoring
* Monitor for signs and symptoms of *C. difficile*-associated diarrhea.
* Consider serum magnesium levels with prolonged use (>1 year), especially in patients taking concomitant diuretics or digoxin.
* Monitor for signs of vitamin B12 deficiency with long-term therapy.
## Clinical Pearls
* Administer 30-60 minutes before a meal.
* For IV administration, reconstitute and further dilute as per manufacturer instructions.
* Long-term PPI use is associated with increased risk of fractures and *C. difficile* infection; use the lowest effective dose for the shortest duration needed.
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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.
