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The patient with pneumocystitis has an order for trimethoprim/sulfamethoxazole (TMP/SMX) 160 mg TMP / 800 mg...

The patient with pneumocystitis has an order for trimethoprim/sulfamethoxazole (TMP/SMX) 160 mg TMP / 800 mg SMX p.o. q.6h. The patient weighs 78 kg. The drug reference manual states the following about the dosage for trimethoprim/sulfamethoxazole: 15 – 20 mg TMP / kg / day divided q.6 – 8h. Dosing based on TMP content. What is the maximum daily dose for this patient? ________mg

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Answer #1

Formula

maximum available dose * weight = maximum daily dose

Maximum available dose=20mg/kg/day

Weight=78kg

20mg/kg/day* 78kg=1560mg

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