Dosage, dilution, and days-supply calculation setups explained step by step for the PTCB exam.
34 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the formula for calculating days supply of a medication?
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Days supply = total quantity dispensed / quantity used per day- How do you calculate the total quantity needed to fill a prescription?
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Total quantity = dose x frequency per day x days supply- What dilution formula relates a stock solution's concentration and volume to a diluted solution's?
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C1V1 = C2V2- In C1V1 = C2V2, what does C1 represent?
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The concentration (strength) of the starting stock solution- In C1V1 = C2V2, what does V2 represent?
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The final volume of the diluted solution- What calculation method finds the ratio of two different strengths needed to make a desired intermediate strength?
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Alligation- In an alligation alternate grid, where is the desired final concentration placed?
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In the center of the grid- What is alligation medial used to calculate?
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The resulting strength when combining two or more quantities of known, different strengths- What is the formula for weight-based (mg/kg) drug dosing?
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Dose = patient weight (kg) x dose per kg (mg/kg)- What is the standard conversion factor for changing pounds to kilograms?
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Divide the weight in pounds by 2.2- What formula estimates body surface area (BSA) using the Mosteller method?
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BSA (m^2) = square root of [(height in cm x weight in kg) / 3600]- How is a medication dose calculated when dosing is based on body surface area?
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Dose = BSA (m^2) x dose per m^2- How many milliliters are in 1 teaspoon?
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5 mL- How many milliliters are in 1 tablespoon?
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15 mL- How many milliliters are in 1 fluid ounce?
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30 mL
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