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# Pantoprazole ## Overview Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion by inhibiting the H+/K+-ATPase enzyme system in the gastric parietal cell. It is available in oral (delayed-release tablets, suspension) and intravenous (IV) formulations. ## Primary Indications * Short-term treatment of erosive esophagitis (associated with GERD). * Maintenance of healing of erosive esophagitis. * Pathological hypersecretory conditions (e.g., Zollinger-Ellison syndrome). * Prophylaxis of stress-induced upper GI hemorrhage (IV). ## Adult Dosing * **Erosive Esophagitis:** 40 mg orally or IV once daily for up to 8 weeks. Maintenance therapy: 40 mg daily. * **GERD (Symptomatic):** 20 mg to 40 mg orally once daily. * **Hypersecretory Conditions:** Starting dose 40 mg twice daily. Doses may be titrated up to 240 mg daily based on patient need. * **Stress Ulcer Prophylaxis:** 40 mg IV daily. ## Pediatric Dosing * **Erosive Esophagitis (5 years or older):** * 15 kg to <40 kg: 20 mg once daily for up to 8 weeks. * ≥40 kg: 40 mg once daily for up to 8 weeks. ## Dose Adjustments * **Hepatic Impairment:** Reduce frequency or total daily dose in severe hepatic impairment. No routine adjustment required for mild to moderate impairment. * **Renal Impairment:** No dosage adjustment necessary. ## Contraindications * Known hypersensitivity to pantoprazole or other substituted benzimidazoles (e.g., omeprazole). * Concurrent use with rilpivirine-containing products. ## Adverse Effects * **Common:** Headache, diarrhea, nausea, abdominal pain, flatulence. * **Serious:** *Clostridioides difficile*-associated diarrhea, bone fractures (long-term use), hypomagnesemia, Vitamin B12 deficiency (long-term use), cutaneous/systemic lupus erythematosus, interstitial nephritis. ## Key Drug Interactions * **pH-Dependent Drugs:** May decrease absorption of drugs like rilpivirine, ketoconazole, and mycophenolate mofetil. * **Methotrexate:** Potential increase in methotrexate levels, especially in high-dose therapy. * **Warfarin:** Monitor INR/PT due to potential changes in anticoagulation effect. ## Monitoring * Monitor for signs/symptoms of GI bleeding. * Long-term use: Monitor magnesium levels, Vitamin B12, and bone mineral density if clinically indicated. * Monitor for onset/worsening of diarrhea (rule out *C. difficile*). ## Clinical Pearls * **Administration:** Oral tablets should be swallowed whole; do not crush or chew. IV administration should be a slow injection (over 2 minutes) or a brief infusion (over 15 minutes). * **Duration:** PPIs should be used at the lowest effective dose for the shortest duration necessary. * **De-prescribing:** Always evaluate the ongoing necessity of PPI therapy to avoid unnecessary long-term use. * **Formulation:** Pantoprazole granules for oral suspension are often used for patients unable to swallow tablets; mix with applesauce or apple juice and consume immediately. *** *Disclaimer: This information is for educational purposes and does not replace professional medical judgment. Always verify current prescribing information, institutional protocols, and specific patient safety data via official sources such as the FDA or clinical drug databases before prescribing or administering medication.*