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# Pantoprazole ## Overview Pantoprazole is a proton pump inhibitor (PPI) that suppresses gastric acid secretion. ## Primary Indications * Healing of erosive esophagitis associated with gastroesophageal reflux disease (GERD). * Maintenance of healing of erosive esophagitis. * Pathological hypersecretory conditions, including Zollinger-Ellison syndrome (ZES). ## Adult Dosing * **Erosive Esophagitis:** 40 mg orally once daily for up to 8 weeks. A second 8-week course may be considered for patients not healed. * **Maintenance of Healing:** 40 mg orally once daily. * **Pathological Hypersecretory Conditions (e.g., ZES):** Starting dose is typically 40 mg orally twice daily. Doses can be adjusted based on acid output. Doses higher than 40 mg twice daily should be administered with caution. The maximum recommended dose is 240 mg per day. ## Pediatric Dosing * **Age 5-11 years:** * **GERD (symptomatic):** 20 mg orally once daily for up to 8 weeks. * **Erosive Esophagitis:** 40 mg orally once daily for up to 8 weeks. * **Age 12-15 years:** * **GERD (symptomatic):** 40 mg orally once daily for up to 8 weeks. * **Erosive Esophagitis:** 40 mg orally once daily for up to 8 weeks. * **Note:** For children weighing > 40 kg, the adult dose of 40 mg daily may be used for GERD symptomatic treatment or erosive esophagitis. Efficacy and safety for longer than 8 weeks have not been established in this age group. ## Dose Adjustments No dose adjustment is generally required for patients with hepatic or renal impairment. ## Contraindications * Known hypersensitivity to pantoprazole or any component of the formulation. ## Adverse Effects Common adverse effects include headache, diarrhea, nausea, abdominal pain, and dizziness. Long-term use of PPIs is associated with an increased risk of: * Fractures (hip, wrist, spine) * Clostridium difficile infection * Vitamin B12 deficiency * Hypomagnesemia * Renal impairment (acute interstitial nephritis) ## Key Drug Interactions * **Clopidogrel:** Pantoprazole may decrease the effectiveness of clopidogrel due to CYP2C19 inhibition. Consider alternatives or separate administration times if concomitant use is necessary. * **Methotrexate:** PPIs may increase methotrexate levels, potentially leading to toxicity. * **Drugs dependent on gastric pH for absorption:** PPIs can decrease the absorption of drugs such as ketoconazole, itraconazole, and certain HIV protease inhibitors. ## Monitoring * Monitor for signs and symptoms of C. difficile-associated diarrhea. * Consider monitoring magnesium levels in patients on long-term therapy, especially those taking concomitant medications like digoxin or diuretics. * Monitor for signs of fracture. ## Clinical Pearls * For oral administration, pantoprazole tablets should be swallowed whole and not chewed or crushed. * The delayed-release capsules should be swallowed whole. If needed, the capsule contents can be mixed with applesauce, potato flakes, or pudding and should be consumed immediately. Do not chew or crush the granules inside the capsule. * Intravenous formulations are available for patients unable to take oral medications. * If GERD symptoms persist or worsen despite treatment, further evaluation is warranted. **Disclaimer:** This information is intended for healthcare professionals. Always consult the most current prescribing information and guidelines for complete details.