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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid production.
## Primary Indications
* Gastroesophageal reflux disease (GERD) - erosive esophagitis and symptom relief
* Healing of erosive esophagitis
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* Adjunct therapy in *Helicobacter pylori* eradication
## Adult Dosing
* **GERD/Erosive Esophagitis:** 40 mg orally or intravenously once daily. Duration typically 4-8 weeks.
* **Maintenance of Healing:** 40 mg orally once daily. Lower doses may be used for symptom relief.
* **H. pylori Eradication (triple therapy):** 40 mg orally twice daily for 7-14 days, in combination with antibiotics (e.g., amoxicillin and clarithromycin or metronidazole and clarithromycin).
* **Zollinger-Ellison Syndrome:** Start with 40 mg orally or intravenously twice daily. Doses can be titrated up to 240 mg daily divided every 6 hours.
## Pediatric Dosing
* **GERD (erosive esophagitis):**
* **1 to <5 years:** 20 mg orally once daily.
* **5 to <12 years:** 20 mg orally once daily. If needed, 40 mg once daily.
* **≥12 years:** 40 mg orally once daily.
* **Intravenous (IV):** Dosing is complex and depends on weight and indication. Consult specific pediatric guidelines or pharmacy resources.
## Dose Adjustments
No dose adjustment is generally required for hepatic impairment, although some sources suggest reducing the dose by half for severe impairment. No dose adjustment is needed for renal impairment.
## Contraindications
* Known hypersensitivity to pantoprazole or other PPIs.
## Adverse Effects
* **Common:** Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
* **Serious:** *Clostridium difficile*-associated diarrhea, bone fractures (hip, wrist, spine) with long-term use, hypomagnesemia, vitamin B12 deficiency, and potential increased risk of pneumonia.
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** May decrease absorption of drugs like ketoconazole, itraconazole, iron supplements, and certain HIV protease inhibitors.
* **Methotrexate:** PPIs may increase methotrexate levels.
* **CYP2C19 substrates/inhibitors:** Pantoprazole is a moderate inhibitor of CYP2C19. Consider potential interactions with drugs metabolized by this enzyme (e.g., clopidogrel, though clinical significance with pantoprazole is debated).
## Monitoring
* Monitor for signs and symptoms of *C. difficile* infection.
* Consider monitoring magnesium levels with prolonged therapy (>1 year) or with concomitant diuretic use.
* Assess for bone pain or fracture risk factors with long-term use.
* Monitor for signs of vitamin B12 deficiency with prolonged therapy.
## Clinical Pearls
* Administer oral pantoprazole 30-60 minutes before a meal for optimal efficacy.
* IV pantoprazole is typically reconstituted and further diluted before administration.
* Long-term use of PPIs should be reserved for patients with specific indications, as risks can outweigh benefits for some.
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*Disclaimer: This information is intended for clinical use and is not exhaustive. Always consult the most current prescribing information and relevant clinical guidelines before making treatment decisions. Verify all drug information with reliable sources.*
