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# Pantoprazole ## Overview Pantoprazole is a proton pump inhibitor (PPI) that reduces gastric acid production. ## Primary Indications * Gastroesophageal reflux disease (GERD) - symptomatic relief and healing of erosive esophagitis. * Peptic ulcer disease (PUD) - healing of duodenal ulcers and gastric ulcers. * Zollinger-Ellison syndrome. * Part of *Helicobacter pylori* eradication regimens. ## Adult Dosing * **GERD/Erosive Esophagitis:** 40 mg orally or intravenously once daily for 4-8 weeks. For maintenance, 20-40 mg once daily. * **Duodenal Ulcers:** 40 mg orally once daily for 2-4 weeks. * **Gastric Ulcers:** 40 mg orally once daily for 4-8 weeks. * ***H. pylori* Eradication:** 40 mg orally twice daily for 7-14 days in combination with antibiotics (e.g., amoxicillin and clarithromycin). * **Zollinger-Ellison Syndrome:** Starting dose is typically 40 mg orally or intravenously once daily. Doses can be increased up to 240 mg per day divided into doses every 12 hours. ## Pediatric Dosing * **GERD/Erosive Esophagitis:** * Children 5 to 11 years: 20-40 mg orally once daily. * Children 12 to 17 years: 40 mg orally once daily. * Dosing for younger children and for IV administration in pediatrics is less established and should be guided by specialist consultation or specific protocols. ## Dose Adjustments No dose adjustment is generally required for hepatic or renal impairment in adults, although caution may be advised in severe hepatic impairment. ## Contraindications * Hypersensitivity to pantoprazole, other substituted benzimidazoles, or any component of the formulation. ## Adverse Effects * **Common:** Headache, diarrhea, nausea, abdominal pain, dizziness, flatulence. * **Serious:** Clostridium difficile-associated diarrhea, bone fracture (hip, wrist, spine) with long-term use, hypomagnesemia (can be severe and asymptomatic, leading to tetany, seizures, arrhythmias), vitamin B12 deficiency, fundic gland polyps. ## Key Drug Interactions * **Drugs requiring gastric acid for absorption:** Ketoconazole, itraconazole, posaconazole, iron salts, vitamin B12. Absorption may be decreased. * **CYP2C19 substrates:** Methotrexate (may increase methotrexate levels). * **Warfarin:** May increase INR and risk of bleeding. Monitor INR closely. * **HIV protease inhibitors (e.g., atazanavir, nelfinavir):** Concurrent use is generally not recommended due to decreased absorption. ## Monitoring * Monitor for symptoms of hypomagnesemia (e.g., muscle cramps, seizures, arrhythmias) with prolonged therapy. * Monitor for signs and symptoms of *Clostridium difficile* infection. * Consider monitoring vitamin B12 levels with prolonged therapy. ## Clinical Pearls * Administer orally 30-60 minutes before a meal for optimal efficacy. * For IV administration, reconstitute and dilute as per manufacturer instructions. Infuse over 15 minutes. * Long-term use of PPIs is associated with potential risks, including fractures and C. difficile infection. Use the lowest effective dose for the shortest duration necessary. * Do not crush or chew delayed-release tablets. *** *Disclaimer: This information is for educational purposes only and does not substitute for professional medical advice. Always consult with a qualified healthcare provider and refer to the most current prescribing information before making any decisions about medication use.*