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# Pantoprazole
## Overview
Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion.
## Primary Indications
* Gastroesophageal reflux disease (GERD) - symptomatic relief and healing of erosive esophagitis
* Duoodenal ulcers
* Gastric ulcers
* Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome)
* Part of *Helicobacter pylori* eradication regimens
## Adult Dosing
* **GERD, Erosive Esophagitis, Duodenal Ulcers, Gastric Ulcers:** 40 mg once daily. Healing of erosive esophagitis may require up to 8 weeks.
* **Maintenance of Healing of Erosive Esophagitis:** 40 mg once daily; may consider 20 mg once daily.
* **Pathological Hypersecretory Conditions:** Starting dose typically 40 mg twice daily, may be increased. Doses up to 240 mg daily have been used.
* ***H. pylori* Eradication:** Typically in combination with antibiotics. Common regimens include pantoprazole 40 mg twice daily for 7-14 days. Specific protocols vary.
## Pediatric Dosing
Dosing is weight-based and depends on indication. Specific recommendations require consultation of current pediatric guidelines or manufacturer information.
* **GERD (symptomatic):** Generally 1-1.5 mg/kg/day divided into one or two doses. Maximum daily dose 40 mg.
* **Erosive Esophagitis:** Generally 1.15-2.5 mg/kg/day divided into one or two doses. Maximum daily dose 40 mg.
## Dose Adjustments
No dose adjustment is typically needed for hepatic or renal impairment.
## Contraindications
* Known hypersensitivity to pantoprazole, substituted benzimidazoles, or any component of the formulation.
## Adverse Effects
Common: Headache, diarrhea, nausea, abdominal pain, flatulence, dizziness.
Less common: Rash, pruritus, elevated liver enzymes.
Long-term use (over 1 year) may be associated with:
* Increased risk of *Clostridium difficile*-associated diarrhea
* Bone fractures (hip, wrist, spine) - particularly with high doses and prolonged duration
* Vitamin B12 deficiency
* Hypomagnesemia
## Key Drug Interactions
* **Drugs requiring gastric acid for absorption:** Ketoconazole, itraconazole, iron salts, mycophenolate mofetil. Pantoprazole decreases absorption. Separate administration or consider alternatives.
* **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity. Monitor and consider dose reduction or interruption of PPI.
* **CYP2C19 Substrates:** Pantoprazole is a moderate inhibitor of CYP2C19. May affect metabolism of drugs like clopidogrel (reduced efficacy), though clinical significance is debated.
## Monitoring
* Monitor for clinical improvement of symptoms.
* Long-term use: Consider monitoring magnesium levels, especially in patients on diuretics or other medications known to cause hypomagnesemia. Assess for bone fracture risk. Monitor for signs of *C. difficile* infection.
## Clinical Pearls
* Administer orally before a meal, preferably breakfast.
* For delayed-release tablets, swallow whole; do not crush, chew, or split.
* For IV administration, reconstitution and further dilution are required.
* PPIs are most effective when taken consistently.
* The risk of fracture increases with dose and duration of use. Consider lowest effective dose for shortest duration necessary.
**Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and institutional guidelines for complete details and to ensure patient-specific appropriateness.
