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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that decreases the amount of acid produced in the stomach.
## Primary Indications
* Healing of erosive esophagitis
* Maintenance of healing of erosive esophagitis
* Symptomatic gastroesophageal reflux disease (GERD)
* Reduction of risk of NSAID-associated gastric ulcers
## Adult Dosing
* **Healing of erosive esophagitis:** 40 mg orally or IV once daily for up to 8 weeks.
* **Maintenance of healing of erosive esophagitis:** 40 mg orally once daily. Some patients may be treated with 20 mg orally once daily.
* **Symptomatic GERD:** 40 mg orally once daily for up to 4 weeks.
* **Reduction of risk of NSAID-associated gastric ulcers:** 20 mg orally once daily.
## Pediatric Dosing
* **Erosive esophagitis (ages 5 to 11 years):** 20 mg orally once daily for up to 8 weeks.
* **Erosive esophagitis (ages 12 to 17 years):** 40 mg orally once daily for up to 8 weeks.
* Dosing in younger children or for other indications is not well established and may depend on local protocols.
## Dose Adjustments
* **Hepatic impairment:** Maximum daily dose of 40 mg orally. No dose adjustment necessary for renal impairment.
## Contraindications
* Known hypersensitivity to pantoprazole or any of its components.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, dizziness, fatigue.
* **Serious:** Bone fractures (hip, wrist, spine), *Clostridium difficile*-associated diarrhea, hypomagnesemia, vitamin B12 deficiency, lupus erythematosus.
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** Ketoconazole, itraconazole, posaconazole, iron salts, and vitamin B12. Pantoprazole may decrease absorption.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates:** Pantoprazole is a substrate of CYP2C19. Consider potential interactions with drugs metabolized by this enzyme.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., tremor, muscle cramps, seizures).
* Monitor for bone fractures, especially with long-term use.
* Monitor for symptoms of *C. difficile* infection.
## Clinical Pearls
* Pantoprazole is generally well-tolerated.
* Long-term use of PPIs may be associated with increased risk of certain adverse events. Consider the lowest effective dose for the shortest duration necessary.
* Administer pantoprazole oral suspension at least 1 hour before a meal.
* IV administration requires reconstitution and further dilution. Follow specific institutional guidelines.
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**Disclaimer:** This information is intended for clinical use and does not replace comprehensive drug information resources. Always verify current prescribing information, including contraindications, warnings, and drug interactions, with the manufacturer's product monograph or other authoritative sources before making therapeutic decisions.
