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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Gastroesophageal reflux disease (GERD)
* Erosive esophagitis
* Zollinger-Ellison syndrome
* Healing of duodenal ulcers
* H. pylori eradication (in combination regimens)
## Adult Dosing
* **GERD/Erosive Esophagitis:** 20 mg to 40 mg once daily. Maximum 40 mg daily for GERD, may be increased to 40 mg twice daily for severe erosive esophagitis.
* **Duodenal Ulcers:** 40 mg once daily.
* **Zollinger-Ellison Syndrome:** Starting dose 40 mg twice daily. Doses may be adjusted based on gastric acid output, with a maximum of 240 mg per day (divided into three doses).
* **H. pylori Eradication:** 40 mg twice daily for 7-14 days, in combination with antibiotics.
## Pediatric Dosing
* **GERD (ages 5-16 years):** 20 mg to 40 mg once daily.
* Dosing for children under 5 years for GERD is not well established.
## Dose Adjustments
* **Hepatic Impairment:** Maximum dose of 20 mg once daily for moderate to severe hepatic impairment.
## Contraindications
* Known hypersensitivity to pantoprazole or other PPIs.
## Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
Long-term use associated with: Vitamin B12 deficiency, hypomagnesemia, increased risk of Clostridium difficile infection, bone fractures (hip, wrist, spine).
## Key Drug Interactions
* **Clopidogrel:** Pantoprazole may decrease the antiplatelet effect of clopidogrel. Consider alternative PPIs with less CYP2C19 interaction if concurrent use is necessary.
* **Methotrexate:** PPIs may increase methotrexate levels. Monitor for methotrexate toxicity.
* **Drugs dependent on gastric pH:** Absorption of drugs such as ketoconazole, itraconazole, and certain HIV protease inhibitors may be decreased.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., tremors, seizures, arrhythmias).
* Monitor for signs of C. difficile infection.
* Monitor for bone mineral density with long-term therapy.
* Consider monitoring vitamin B12 levels with prolonged use.
## Clinical Pearls
* Administer 30-60 minutes before a meal.
* Tablets should be swallowed whole and not crushed or chewed.
* Delayed-release granules for oral suspension are available for patients unable to swallow tablets.
* Long-term use should be reserved for conditions where it is clinically indicated, and periodic reassessment of the need for therapy is recommended.
This information is intended for healthcare professionals. Always verify current prescribing information with the manufacturer's official product monograph or other reliable drug information resources.
