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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Healing of erosive esophagitis associated with gastroesophageal reflux disease (GERD).
* Maintenance of healing of erosive esophagitis.
* Treatment of pathological hypersecretory conditions, such as Zollinger-Ellison syndrome.
## Adult Dosing
* **Erosive esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of healing erosive esophagitis:** 40 mg orally once daily. Some patients may be managed on 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 needed. Maximum recommended daily oral dose is 240 mg. Maximum recommended daily IV dose is 240 mg divided into 4 doses of 60 mg every 6 hours.
## Pediatric Dosing
* **Erosive esophagitis (ages 5 to 16 years):** 20 mg to 40 mg orally once daily. Dosing is based on weight.
## Dose Adjustments
* **Hepatic Impairment:** Reduce daily dose of oral pantoprazole to 20 mg once daily. For IV administration, consider reducing dose.
* **Renal Impairment:** No dose adjustment is typically necessary.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of the formulation.
## Adverse Effects
* **Common:** Diarrhea, headache, dizziness, abdominal pain, nausea, flatulence.
* **Serious:** Increased risk of Clostridium difficile-associated diarrhea, bone fractures (hip, wrist, spine) with long-term use, hypomagnesemia, vitamin B12 deficiency, and potential for fundic gland polyps.
## Key Drug Interactions
* **Clopidogrel:** Concomitant use may decrease clopidogrel's antiplatelet effect. Consider alternative PPIs or separate administration times if clopidogrel is essential.
* **Certain Antiretrovirals (e.g., rilpivirine, atazanavir):** Gastric pH-dependent absorption may be affected, leading to reduced efficacy.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **Drugs Dependent on Gastric pH for Absorption:** E.g., ketoconazole, itraconazole, iron salts.
## Monitoring
* Monitor for signs and symptoms of hypomagnesemia (e.g., muscle spasms, seizures, arrhythmias).
* Monitor for signs of C. difficile infection.
* Long-term therapy: Consider periodic monitoring of magnesium levels and vitamin B12 levels.
## Clinical Pearls
* Administer oral pantoprazole 30 to 60 minutes before a meal.
* For IV administration, reconstitute and dilute according to manufacturer instructions.
* Long-term use of PPIs is associated with potential risks, and patients should be on the lowest effective dose for the shortest duration necessary.
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**Disclaimer:** This information is intended for clinical use and does not replace a thorough review of the current prescribing information and institutional protocols. Always verify current drug information before making clinical decisions.
