Injectable Sulfamethoxazole/Trimethoprim comes as 400mg/80mg/5ml. Physician requests you to dose a Sulfamethoxazole/Trimethoprim intravenously for PCP. You know the dose is 15mg/kg/day (based on TMP component) divided q6h.
How many milliliters of Sulfamethoxazole/Trimethoprim of 400mg/80mg/5ml would you need for single dose? Patient weighs 80kg.
A . 18.75 mL
B . 75 mL
C . 15 mL
D . 50 mL
E . 16.5 mL
Answer: A
Explanation:
80kg person = 15mg/kg/day = 1200mg/day 80mg /5ml = 1200mg/X X= 75mL/day / 4 doses = 18.75 mL per dose
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