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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid production.
## Primary Indications
* Erosive esophagitis associated with gastroesophageal reflux disease (GERD)
* Maintenance of healing of erosive esophagitis
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* Peptic ulcer disease (duodenal ulcers, gastric ulcers)
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing:** 40 mg orally once daily. May consider 20 mg orally once daily.
* **Pathological hypersecretory conditions:** Starting dose is 40 mg orally or intravenously twice daily. Doses may be increased as clinically needed. Doses up to 240 mg intravenously daily have been administered.
* **Peptic ulcer disease:** 40 mg orally once daily for up to 4 weeks.
## Pediatric Dosing
* **Erosive esophagitis (12 years and older):** 40 mg orally once daily for up to 8 weeks.
* **GERD (5 years and older):**
* **Erosive esophagitis:** 40 mg orally once daily for up to 8 weeks.
* **Symptomatic GERD:** 20 mg to 40 mg orally once daily for up to 8 weeks.
* Dosing in pediatric patients younger than 5 years is not established.
## Dose Adjustments
No dose adjustment is generally required for hepatic or renal impairment.
## Contraindications
Hypersensitivity to pantoprazole, substituted benzimidazoles, or any component of the formulation.
## Adverse Effects
Common adverse effects include headache, diarrhea, nausea, abdominal pain, and dizziness. Long-term use of PPIs may be associated with an increased risk of *Clostridium difficile* infection, bone fractures (hip, wrist, spine), vitamin B12 deficiency, and hypomagnesemia.
## Key Drug Interactions
* **Antiretrovirals:** Pantoprazole can decrease the absorption of antiretrovirals (e.g., rilpivirine, atazanavir).
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole may affect the metabolism of drugs metabolized by CYP2C19 (e.g., clopidogrel, phenytoin).
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., tremors, cramps, seizures).
* Monitor for signs of *Clostridium difficile* infection.
* Consider vitamin B12 levels with long-term therapy.
## Clinical Pearls
* Administer oral pantoprazole at least 30 minutes before a meal.
* For IV administration, reconstitute and further dilute as per manufacturer instructions.
* Oral formulations should not be crushed or chewed; if unable to swallow intact tablet, consider delayed-release pantoprazole sodium for oral suspension.
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**Disclaimer:** This information is intended for healthcare professionals and is not a substitute for comprehensive drug information. Always consult current prescribing information and institutional guidelines for complete and up-to-date details.
