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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that reduces the amount of acid produced 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 (e.g., Zollinger-Ellison syndrome).
* Eradication of *Helicobacter pylori* infection (in combination with antibiotics).
## Adult Dosing
* **Erosive Esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks. For maintenance, 40 mg orally once daily. Some patients may benefit from 20 mg orally once daily.
* **Pathological Hypersecretory Conditions:** Starting dose is typically 40 mg orally or intravenously twice daily. Doses can be increased as clinically indicated. Doses up to 240 mg daily have been administered intravenously.
* ***H. pylori* Eradication:** 40 mg orally twice daily in combination with clarithromycin and amoxicillin or clarithromycin and metronidazole for 7 days.
## Pediatric Dosing
Dosing in pediatric patients is highly variable and often based on weight. Consult specific pediatric guidelines or product information.
* **Children 5 to 11 years:**
* Erosive esophagitis: 20 mg orally once daily for up to 8 weeks.
* **Adolescents 12 to 17 years:**
* Erosive esophagitis: 40 mg orally once daily for up to 8 weeks.
* GERD without esophagitis: 20 mg orally once daily for up to 8 weeks.
## Dose Adjustments
No dose adjustment is generally needed for hepatic or renal impairment.
## 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 of PPIs may be associated with an increased risk of:
* Fractures (hip, wrist, spine)
* Clostridium difficile infection
* Vitamin B12 deficiency
* Hypomagnesemia
## Key Drug Interactions
* **Drugs dependent on gastric pH for absorption:** Antiretrovirals (e.g., rilpivirine, atazanavir), antifungals (e.g., ketoconazole, itraconazole), certain tyrosine kinase inhibitors.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. Monitor for potential drug interactions with clopidogrel and others.
## Monitoring
* Monitor for signs and symptoms of hypersensitivity reactions.
* Monitor for signs of *C. difficile* infection.
* Monitor electrolytes, particularly magnesium, with prolonged therapy.
* Consider vitamin B12 levels with prolonged therapy.
## Clinical Pearls
* Administer oral pantoprazole 30 minutes to 1 hour before a meal.
* Swallow pantoprazole tablets whole; do not crush, chew, or split them.
* For intravenous administration, reconstitute and further dilute according to manufacturer instructions.
* PPIs are effective for symptom relief and healing but do not eliminate the underlying cause of GERD. Consider step-down therapy once symptoms are controlled.
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*Disclaimer: This information is intended for healthcare professionals. Always consult the most current prescribing information and local guidelines before making clinical decisions.*
