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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 associated with gastroesophageal reflux disease (GERD).
* Maintenance of healing of erosive esophagitis.
* Reduction of risk of NSAID-associated gastric ulcers in patients taking NSAIDs.
* Pathological hypersecretory conditions, including Zollinger-Ellison syndrome.
## Adult Dosing
* **Erosive Esophagitis:** 40 mg orally or intravenously once daily for up to 8 weeks.
* **Maintenance of Healing of Erosive Esophagitis:** 40 mg orally once daily. Some patients may be adequately maintained on 20 mg orally once daily.
* **Reduction of Risk of NSAID-Associated Gastric Ulcers:** 20 mg orally once daily.
* **Pathological Hypersecretory Conditions (e.g., Zollinger-Ellison Syndrome):**
* **Oral:** Starting dose is typically 40 mg orally twice daily. Doses may be adjusted based on gastric acid output. Doses up to 240 mg daily have been administered (divided into 4 doses of 60 mg each).
* **Intravenous:** Starting dose is typically 80 mg intravenously once daily. Doses may be adjusted based on gastric acid output. Doses up to 240 mg daily have been administered (divided into 4 doses of 60 mg each).
## Pediatric Dosing
* **Erosive Esophagitis (ages 5 to 16 years):** 20 mg orally once daily for up to 8 weeks.
* **Erosive Esophagitis (ages 1 month to less than 5 years):** 1.25 mg/kg orally once daily for up to 8 weeks. Do not exceed 40 mg daily.
* **Note:** Dosing for pediatric patients can be complex and may depend on specific clinical guidelines and individual patient factors. Consult specific pediatric guidelines or specialist advice. Intravenous formulations are generally not recommended for children.
## Dose Adjustments
* **Hepatic Impairment:** Maximum dose of 40 mg orally once daily.
* **Renal Impairment:** No dose adjustment necessary.
## Contraindications
* Known hypersensitivity to pantoprazole or any of its components.
## Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
Serious: *Clostridium difficile*-associated diarrhea, bone fractures (hip, wrist, spine), hypomagnesemia, vitamin B12 deficiency.
## Key Drug Interactions
* **Warfarin:** Increased risk of bleeding. Monitor INR closely.
* **Methotrexate:** Pantoprazole may increase methotrexate levels, potentially leading to toxicity.
* **Drugs dependent on gastric pH for absorption:** May alter absorption (e.g., ketoconazole, itraconazole, atazanavir, nelfinavir).
## Monitoring
* Magnesium levels (especially with long-term use, typically >3 months or with concomitant diuretic use).
* Vitamin B12 levels (especially with long-term use, typically >3 years).
* Bone mineral density (in patients at risk for osteoporosis).
* Signs and symptoms of *Clostridium difficile*-associated diarrhea.
## Clinical Pearls
* Pantoprazole is available in oral and intravenous formulations.
* Oral pantoprazole is generally taken once daily, 30-60 minutes before a meal.
* Long-term PPI use is associated with an increased risk of fractures, *C. difficile* infection, hypomagnesemia, and vitamin B12 deficiency. Use the lowest effective dose for the shortest duration necessary.
* Do not crush or chew delayed-release tablets or capsules.
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**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and relevant clinical guidelines for complete details and to ensure patient safety. This information is not a substitute for professional medical judgment.
