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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion by irreversibly inhibiting the H+/K+-ATPase enzyme system in gastric parietal cells.
## Primary Indications
* Erosive esophagitis associated with gastroesophageal reflux disease (GERD)
* Maintenance of healing of erosive esophagitis
* 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:** 40 mg orally once daily. Some patients may be treated with 20 mg orally once daily.
* **Pathological Hypersecretory Conditions:** Starting dose of 40 mg orally or intravenously twice daily. Doses may be increased as needed. Doses up to 240 mg IV daily have been administered.
## Pediatric Dosing
* **Erosive Esophagitis (1-5 years):** 10 mg orally once daily for up to 8 weeks.
* **Erosive Esophagitis (5-12 years):** 20 mg orally once daily for up to 8 weeks.
* **Erosive Esophagitis (≥12 years):** 40 mg orally once daily for up to 8 weeks.
* **Note:** Dosing for pediatric patients weighing less than 40 kg may require special consideration and may be based on weight-based calculations, as per local protocol.
## Dose Adjustments
* **Hepatic Impairment:** Maximum daily dose of 40 mg orally or 40 mg IV per day.
* **Renal Impairment:** No dose adjustment necessary.
## Contraindications
* Known hypersensitivity to pantoprazole or any component of its formulation.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, dizziness.
* **Long-term use concerns:** Increased risk of C. difficile infection, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency.
## Key Drug Interactions
* **Clopidogrel:** Concomitant use may decrease the antiplatelet effect of clopidogrel. Consider alternative PPIs if possible.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity.
* **Drugs dependent on gastric pH for absorption:** May alter absorption of drugs such as ketoconazole, itraconazole, iron salts, and vitamin B12.
* **Saquinavir:** May increase saquinavir plasma levels.
## Monitoring
* **Magnesium levels:** Annually or as needed, especially with long-term therapy or concomitant diuretic use.
* **Vitamin B12 levels:** Periodically with long-term therapy.
* **Bone density:** Consider in patients at risk for osteoporosis.
* **Renal function:** If Clostridium difficile infection is suspected.
## Clinical Pearls
* Administer oral pantoprazole 30 minutes before a meal.
* IV formulation is available for patients unable to take oral medications.
* Short-term use is recommended; prolonged use should be reserved for specific indications and regularly reassessed.
* Be aware of the potential for rebound acid hypersecretion upon abrupt discontinuation. Tapering may be considered.
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*Disclaimer: This information is intended for healthcare professionals and is not a substitute for professional medical advice. Always consult the most current prescribing information and relevant clinical guidelines before making any treatment decisions.*
