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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.
* Treatment of pathological hypersecretory conditions, such as Zollinger-Ellison syndrome.
## Adult Dosing
* **Erosive esophagitis healing:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing:** 40 mg orally once daily.
* **Pathological hypersecretory conditions:** Starting dose is typically 40 mg orally or intravenously twice daily. Doses may be increased as clinically indicated. Maximum dose is typically 120 mg intravenously every 8 hours or 240 mg orally every 24 hours.
## Pediatric Dosing
* **Erosive esophagitis healing (5-16 years):** 20-40 mg orally once daily depending on weight (patients > 40 kg receive 40 mg). Duration is typically up to 8 weeks.
* Dosing for younger children or for intravenous use in pediatrics is less established and may depend on institutional protocols.
## Dose Adjustments
No dose adjustment is typically necessary for patients with hepatic or renal impairment, though caution is advised.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
Common adverse effects include headache, diarrhea, nausea, abdominal pain, vomiting, dizziness, and rash. Long-term use may be associated with an increased risk of fractures, Clostridium difficile infection, hypomagnesemia, and vitamin B12 deficiency.
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** PPIs can decrease absorption of drugs like ketoconazole, itraconazole, posaconazole, iron salts, and vitamin B12.
* **Methotrexate:** Concurrent use may increase and prolong serum levels of methotrexate, potentially leading to toxicity.
* **CYP2C19 substrates:** Pantoprazole can inhibit CYP2C19, potentially increasing levels of drugs metabolized by this enzyme (e.g., clopidogrel).
## Monitoring
* Monitor for signs and symptoms of Clostridium difficile infection.
* Consider monitoring magnesium levels, especially with prolonged use or concurrent diuretic use.
* Monitor for signs of vitamin B12 deficiency with long-term therapy.
## Clinical Pearls
* Administer oral pantoprazole at least 30 minutes before a meal.
* Intravenous formulation should be administered over at least 2 minutes.
* Do not crush or chew delayed-release tablets.
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***Disclaimer:** This information is intended for healthcare professionals. It is essential to consult the most current prescribing information and relevant clinical guidelines for definitive patient management. Dosing may vary based on individual patient factors and local protocols.*
