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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 GERD.
* Maintenance of healing of erosive esophagitis.
* Treatment of pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome).
## Adult Dosing
* **Healing of Erosive Esophagitis:** 40 mg orally once daily for up to 8 weeks.
* **Maintenance of Healing of Erosive Esophagitis:** 40 mg orally once daily. For patients who are at risk for recurrence, 20 mg orally once daily may be considered.
* **Pathological Hypersecretory Conditions:** Starting dose 40 mg orally twice daily, may be increased to a maximum of 240 mg daily divided into two doses.
## Pediatric Dosing
* **Patients 5 to 11 years:**
* Healing of Erosive Esophagitis: 20 mg orally once daily for 4 weeks.
* Healing of Erosive Esophagitis (if not healed after 4 weeks): 40 mg orally once daily for up to 4 additional weeks.
* **Patients 12 to 16 years:**
* Healing of Erosive Esophagitis: 40 mg orally once daily for up to 8 weeks.
* *Note: Dosing for children less than 5 years of age is not established.*
## Dose Adjustments
* **Hepatic Impairment:** Maximum dose of 20 mg orally once daily.
## Contraindications
* Known hypersensitivity to any component of the formulation.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
* **Serious:** Clostridium difficile-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency, systemic lupus erythematosus.
## Key Drug Interactions
* **Drugs dependent on gastric pH for absorption:** Ketoconazole, itraconazole, posaconazole, iron salts, mycophenolate mofetil. Pantoprazole can decrease absorption.
* **Methotrexate:** PPIs may increase methotrexate levels. Consider holding pantoprazole during methotrexate treatment.
* **CYP2C19 Substrates:** Pantoprazole can inhibit CYP2C19, potentially increasing levels of drugs like clopidogrel (though clinical significance is debated).
## Monitoring
* Monitor for symptoms of hypomagnesemia (e.g., tremor, tetany, seizures).
* Monitor for bone fracture risk in patients with long-term PPI use.
* Consider vitamin B12 levels with long-term therapy.
## Clinical Pearls
* Administer pantoprazole oral suspension 30 minutes before a meal.
* Pantoprazole delayed-release tablets should be swallowed whole and not chewed or crushed.
* Long-term use of PPIs is associated with potential risks, including C. difficile infection, fractures, and hypomagnesemia.
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*Disclaimer: This information is intended for clinical decision-making support and does not replace current prescribing information. Always verify with the most recent official product monograph or other authoritative sources before initiating therapy.*
