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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that decreases acid production in the stomach.
## Primary Indications
* Healing of erosive esophagitis associated with gastroesophageal reflux disease (GERD).
* Maintenance of healing of erosive esophagitis.
* Treatment of pathological hypersecretory conditions, including Zollinger-Ellison syndrome.
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally 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:** Starting dose is 40 mg orally twice daily. Doses can be increased to up to 240 mg daily (divided into two doses). Doses exceeding 160 mg daily require intravenous administration.
## Pediatric Dosing
* **Erosive esophagitis (12 years and older):** 40 mg orally once daily for up to 8 weeks.
* **GERD symptoms (5 years and older):** 20 mg to 40 mg orally once daily.
* **Note:** Dosing in younger children is less established and should be guided by clinical judgment and specific protocols.
## Dose Adjustments
* **Hepatic impairment:** Maximum dose of 40 mg orally once daily.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
* Common: Headache, diarrhea, nausea, abdominal pain, dizziness, flatulence.
* Long-term use may be associated with: Vitamin B12 deficiency, hypomagnesemia, increased risk of Clostridium difficile infection, bone fractures (hip, wrist, spine).
## Key Drug Interactions
* **Certain HIV protease inhibitors (e.g., atazanavir, nelfinavir):** Reduced plasma concentrations of HIV protease inhibitors.
* **Methotrexate:** Increased serum levels of methotrexate.
* **Warfarin:** May increase INR and prothrombin time.
* **CYP2C19 substrates (e.g., clopidogrel):** Potential for altered efficacy.
## Monitoring
* Electrolytes (especially magnesium) with prolonged use.
* Vitamin B12 levels with prolonged use.
* Bone mineral density with long-term therapy.
* Renal function, especially in patients with severe hepatic impairment.
## Clinical Pearls
* Administer pantoprazole 30 minutes before a meal.
* Do not crush or chew delayed-release formulations.
* IV pantoprazole is available for patients unable to take oral medication.
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*This information is intended for clinical use and does not substitute for professional medical advice. Always consult the most current prescribing information and relevant guidelines before making clinical decisions.*
