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A patient is 185 cm tall and weighs 73 kg. If the order is 15 mg/m² of a drug PO daily, how many 15 mg tablets of the drug will you administer?

Answer :

The patient's body surface area (BSA) is calculated first, and then the drug dosage is calculated using the BSA and the order, which can be expressed in mg/m². Finally, the amount of medication needed to be administered is calculated.


The first step is to calculate the patient's body surface area (BSA), which can be found using the Mosteller formula:

BSA (m2) = [(height (cm) x weight (kg)) / 3600]1/2

After plugging in the values, the patient's BSA is calculated to be 1.89 m².

Then, the drug dosage is calculated by multiplying the BSA by the order in mg/m²:

Drug dosage = BSA x Order15 mg/m² = 1.89 m² x OrderOrder = 15 mg/m² ÷ 1.89 m² = 7.94 mg

To determine the number of tablets to administer, divide the total dose by the strength of a single tablet:

Total dose = 7.94 mg, Number of tablets = Total dose ÷ Strength of one tablet

Number of tablets = 7.94 mg ÷ 15 mg/tablet

Number of tablets = 0.53 tablets

Rounding up to the nearest whole tablet, we get the answer: one 15 mg tablet.

Learn more about tablets here:

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