NAPLEX Flashcards: Dose Conversions

What this deck covers

This deck focuses on Dose Conversions, giving you a quick way to review the definitions, rules, and examples that matter most for NAPLEX.

How to use these flashcards

Work through these flashcards in short sessions. Try to answer each prompt before flipping the card, then revisit any cards you miss until the explanation feels automatic.

Flashcard 1: What is the conversion between household and metric volume: tablespoon to mL?

Answer: $1\ \text{tbsp} = 15\ \text{mL}$. Household conversions define one tablespoon as 15 mL to standardize volume in patient instructions.

Flashcard 2: What is the conversion between milliosmoles and osmoles?

Answer: $1000\ \text{mOsm} = 1\ \text{Osm}$. Osmolarity units convert using the milli- prefix, where 1000 milliosmoles equal one osmole for solution concentration.

Flashcard 3: Identify the volume in mL for a $250\ \text{mg}$ dose using $50\ \text{mg/mL}$ solution.

Answer: $5\ \text{mL}$. Dividing the required dose by the concentration determines the precise volume needed for administration.

Flashcard 4: What is the formula to convert a concentration in mg/mL to total mg for a given mL?

Answer: $\text{mg} = (\text{mg/mL})\times(\text{mL})$. Total drug amount is obtained by multiplying concentration per milliliter by the volume administered.

Flashcard 5: Identify the dose in mg for $5\ \text{mg/kg}$ in a $70\ \text{kg}$ patient.

Answer: $350\ \text{mg}$. Multiplying the per-kilogram dose by patient weight yields the total dose for individualized therapy.

Flashcard 6: What is the ratio strength meaning of $1:100$ (w/v) expressed as mg/mL?

Answer: $10\ \text{mg/mL}$. A 1:100 w/v ratio means 1 g solute in 100 mL solvent, resulting in 10 mg per mL concentration.

Flashcard 7: What is the conversion between milligrams and micrograms?

Answer: $1\ \text{mg} = 1000\ \text{mcg}$. In the metric system, the micro- prefix indicates one-thousandth of a milligram, enabling accurate small-scale measurements.

Flashcard 8: What is the formula for converting Celsius to Fahrenheit?

Answer: $^\circ\text{F} = ( ^\circ\text{C} \times\frac{9}{5}) + 32$. Converting Celsius to Fahrenheit involves multiplying by 9/5 and adding 32, based on the scales' fixed points.

Flashcard 9: What is the conversion between household and metric volume: fluid ounce to mL?

Answer: $1\ \text{fl oz} \approx 30\ \text{mL}$. Approximate conversion uses 30 mL per fluid ounce for practical pharmacy dispensing and patient education.

Flashcard 10: What is the ratio strength meaning of $1:1000$ (w/v) expressed as mg/mL?

Answer: $1\ \text{mg/mL}$. Ratio strength 1:1000 indicates 1 part solute in 1000 parts solvent, yielding 1 mg per mL for w/v solutions.

Flashcard 11: What is the conversion between milliliters and microliters?

Answer: $1\ \text{mL} = 1000\ \text{mcL}$. The micro- prefix in metric volume represents one-thousandth of a milliliter, crucial for precise microliter calculations.

Flashcard 12: What is the formula for converting Fahrenheit to Celsius?

Answer: $^\circ\text{C} = ( ^\circ\text{F} - 32)\times\frac{5}{9}$. The standard temperature conversion subtracts 32 from Fahrenheit and multiplies by 5/9 to obtain Celsius.

Flashcard 13: What is the conversion between pounds and kilograms used for dosing?

Answer: $1\ \text{kg} = 2.2\ \text{lb}$. The avoirdupois system conversion of 2.2 pounds per kilogram is standard for weight-based medication dosing.

Flashcard 14: What is the conversion between kilograms and grams?

Answer: $1\ \text{kg} = 1000\ \text{g}$. The metric prefix kilo- denotes 1000, standardizing conversions between larger and smaller weight units in pharmacy.

Flashcard 15: Identify the mg/mL concentration equivalent of $1\%$ w/v.

Answer: $10\ \text{mg/mL}$. A 1% w/v solution contains 1 g per 100 mL, equivalent to 10 mg per mL in pharmaceutical preparations.

Flashcard 16: What is the conversion between liters and milliliters?

Answer: $1\ \text{L} = 1000\ \text{mL}$. Metric volume units use the milli- prefix for one-thousandth, ensuring consistency in liquid medication measurements.

Flashcard 17: What is the formula to convert a dose from mg/m$^2$ to total mg using BSA in m$^2$?

Answer: $\text{Total mg} = (\text{mg/m}^2)\times(\text{m}^2)$. Body surface area dosing calculates total dose by multiplying the per-square-meter value by the patient's BSA.

Flashcard 18: What is the conversion between household and metric volume: teaspoon to mL?

Answer: $1\ \text{tsp} = 5\ \text{mL}$. Standard household measurements equate one teaspoon to 5 mL for consistent oral medication dosing.

Flashcard 19: What is the conversion between milliequivalents and microequivalents?

Answer: $1\ \text{mEq} = 1000\ \text{mcEq}$. Equivalents follow metric prefixes where milli- to micro- conversion multiplies by 1000 for electrolyte balance assessments.

Flashcard 20: What is the conversion between grams and milligrams?

Answer: $1\ \text{g} = 1000\ \text{mg}$. The metric system defines 1 gram as equivalent to 1000 milligrams, facilitating precise weight conversions in pharmaceutical dosing.

Flashcard 21: What is the BSA formula (Mosteller) using height in cm and weight in kg?

Answer: $\text{BSA} = \sqrt{\frac{\text{cm}\times\text{kg}}{3600}}$. The Mosteller formula estimates body surface area using the square root of height-weight product divided by 3600.

Flashcard 22: What is the formula to convert a concentration in % w/v to mg/mL?

Answer: $\text{mg/mL} = (\%\ \text{w/v})\times 10$. Percent weight/volume converts to milligrams per milliliter by multiplying by 10, as 1% equals 1 g per 100 mL.

Flashcard 23: What is the formula to convert total mg to mL using a concentration in mg/mL?

Answer: $\text{mL} = \frac{\text{mg}}{\text{mg/mL}}$. Volume is calculated by dividing the required dose by the solution's concentration to ensure accurate administration.

Flashcard 24: Identify the mg/mL concentration equivalent of $0.5\%$ w/v.

Answer: $5\ \text{mg/mL}$. Halving the percentage from 1% proportionally reduces the concentration to 5 mg per mL.

Flashcard 25: What is the formula to convert a dose from mg/kg to total mg using weight in kg?

Answer: $\text{Total mg} = (\text{mg/kg})\times(\text{kg})$. Weight-based dosing multiplies the per-kilogram dose by the patient's weight to determine the total amount required.