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## Pantoprazole
### Overview
Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid production.
### Primary Indications
* Gastroesophageal reflux disease (GERD)
* Healing of erosive esophagitis
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* Eradication of *Helicobacter pylori* infection (in combination with antibiotics)
### Adult Dosing
* **GERD/Erosive Esophagitis:** 40 mg orally once daily. Duration of therapy varies based on indication.
* **Pathological Hypersecretory Conditions:** Starting dose is 40 mg orally twice daily. Doses may be increased as needed. Maximum dose typically 120 mg twice daily.
* ***H. pylori* Eradication:** 40 mg orally twice daily for 7-14 days, in combination with amoxicillin and clarithromycin, or clarithromycin and metronidazole.
### Pediatric Dosing
* **GERD/Erosive Esophagitis (ages 5 years and older):**
* **Body weight < 40 kg:** 20 mg orally once daily.
* **Body weight ≥ 40 kg:** 40 mg orally once daily.
* **Healing of Erosive Esophagitis:** 40 mg orally once daily.
### Dose Adjustments
* **Hepatic Impairment:** Maximum dose is 20 mg orally once daily.
### Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
### Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, dizziness.
* **Serious (associated with long-term PPI use):**
* *Clostridium difficile*-associated diarrhea
* Bone fractures (hip, wrist, spine)
* Vitamin B12 deficiency
* Hypomagnesemia
* Cutaneous and systemic lupus erythematosus
### Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** Ketoconazole, itraconazole, iron salts, mycophenolate mofetil. Pantoprazole can decrease their absorption.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Use with caution with other CYP2C19 substrates.
### Monitoring
* Monitor for signs and symptoms of *Clostridium difficile* infection.
* Consider monitoring serum magnesium levels, especially with prolonged use (≥1 year) or concomitant use of diuretics or digoxin.
* Monitor for signs of bone fracture if clinically indicated.
* Monitor for signs of vitamin B12 deficiency with prolonged use.
### Clinical Pearls
* Oral pantoprazole can be taken with or without food.
* Delayed-release tablets should not be crushed or chewed.
* Consider the risk of long-term complications with chronic PPI use.
* Step-down therapy to the lowest effective dose or intermittent therapy may be considered.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant guidelines for definitive patient care decisions.
