NAPLEX Quiz
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FOUNDATIONAL KNOWLEDGE FOR PHARMACY PRACTICE
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A 82-year-old woman (weight 50 kg, height 155 cm) is prescribed trimethoprim-sulfamethoxazole (TMP-SMX) for a urinary tract infection. Current medications: warfarin 3 mg PO daily, losartan 50 mg PO daily. Medical history: atrial fibrillation, chronic kidney disease. Allergies: none. Labs: SCr 1.7 mg/dL. The ordered regimen is TMP-SMX double strength (160/800 mg) 1 tablet PO twice daily. How should the dosage be adjusted for this patient's renal function?
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