Medication Dosage Calculations - NCLEX Pn

1. What is the dose in $\text{mg}$ for an order of $10\,\text{mg/kg}$ for a child weighing $20\,\text{kg}$?

   $200\,\text{mg}$. Multiplies the dosage rate per kilogram by the patient's weight to calculate the total dose.

2. What is the conversion between kilograms and pounds (approximate for NCLEX calculations)?

   $1\,\text{kg} = 2.2\,\text{lb}$. Uses the standard nursing approximation for converting patient weight between kilograms and pounds.

3. What is the dose in $\text{mL}$ if the order is $1\,\text{g}$ and supply is $500\,\text{mg}/2\,\text{mL}$?

   $4\,\text{mL}$. Converts the ordered dose to matching units and proportions the volume based on concentration.

4. What is the conversion between liters and milliliters?

   $1\,\text{L} = 1000\,\text{mL}$. Applies the metric volume conversion where one liter equals one thousand milliliters for fluid measurements.

5. What is the safe setup for a weight-based dose using $\text{mg/kg}$ and patient weight in $\text{kg}$?

   $\text{Dose} = (\text{mg/kg}) \times (\text{kg})$. Computes the total dose by multiplying the weight-based rate by the patient's body weight in kilograms.

6. What is the IV drip rate in $\text{gtt/min}$ for $50\,\text{mL}$ over $30\,\text{min}$ with $10\,\text{gtt/mL}$ tubing?

   $17\,\text{gtt/min}$. Applies the drip rate formula and rounds to the nearest whole number for manual regulation.

7. What is the conversion between grams and milligrams?

   $1\,\text{g} = 1000\,\text{mg}$. Reflects the metric system where one gram is equivalent to one thousand milligrams for dosage conversions.

8. What is the patient weight in $\text{kg}$ if the weight is $154\,\text{lb}$?

   $70\,\text{kg}$. Converts pounds to kilograms by dividing by 2.2, yielding an exact result in this case.

9. Identify the correct rounding for oral liquids measured in $\text{mL}$ (typical NCLEX convention).

   Round to the nearest tenth: $\text{mL}$ to $0.1$. Provides precision in measuring oral liquids to the nearest tenth of a milliliter for accurate dosing.

10. Identify the correct rounding for tablets when the order is in whole tablets only.

    Round to the nearest whole tablet. Ensures safe administration since tablets are indivisible unless scored, requiring whole unit dosing.

11. What is the number of tablets if the order is $0.75\,\text{mg}$ and tablets are $0.25\,\text{mg}$ each?

    $3\,\text{tablets}$. Determines the quantity by dividing the ordered dose by the strength per tablet.

12. Identify the correct rounding for IV pump rates in $\text{mL/hr}$ (typical NCLEX convention).

    Round to the nearest whole number: $\text{mL/hr}$. Aligns with IV pump programming that typically uses whole numbers for milliliters per hour.

13. What volume in $\text{mL}$ contains $0.5\,\text{mg}$ if the vial is labeled $1\,\text{mg}/2\,\text{mL}$?

    $1\,\text{mL}$. Proportions the volume by dividing the desired dose by the concentration and multiplying by the vial's volume per dose.

14. What is the conversion between milligrams and micrograms?

    $1\,\text{mg} = 1000\,\text{mcg}$. Represents the metric conversion factor where one milligram equals one thousand micrograms in medication calculations.

15. What is the formula to convert pounds to kilograms?

    $\text{kg} = \frac{\text{lb}}{2.2}$. Converts pounds to kilograms by dividing by the standard factor of 2.2 for weight-based calculations.

16. What is the conversion between ounces and milliliters (approximate)?

    $1\,\text{oz} = 30\,\text{mL}$. Applies the approximate nursing conversion for fluid ounces to milliliters in dosage calculations.

17. What is the formula for IV flow rate in $\text{gtt/min}$ using $\text{mL}$, drop factor, and minutes?

    $\text{gtt/min} = \frac{\text{mL} \times \text{gtt/mL}}{\text{min}}$. Determines the drip rate by multiplying the volume in milliliters by the drop factor and dividing by the time in minutes.

18. What is the formula for infusion rate in $\text{mL/hr}$ using total volume and hours?

    $\text{mL/hr} = \frac{\text{mL}}{\text{hr}}$. Provides the hourly infusion rate by dividing the total volume by the total number of hours for infusion.

19. What is the conversion between tablespoons and milliliters?

    $1\,\text{tbsp} = 15\,\text{mL}$. Utilizes the conventional conversion for tablespoons to milliliters in medication administration.

20. What is the IV drip rate in $\text{gtt/min}$ for $120\,\text{mL}$ over $1\,\text{hr}$ with $15\,\text{gtt/mL}$ tubing?

    $30\,\text{gtt/min}$. Multiplies volume by drop factor and divides by total minutes to find the drip rate.

21. What is the formula for tablet dosage using desired, have, and quantity?

    $\text{Give} = \frac{D}{H} \times Q$. Calculates the amount to administer by dividing the desired dose by the available dose and multiplying by the quantity per unit.

22. What is the conversion between teaspoons and milliliters?

    $1\,\text{tsp} = 5\,\text{mL}$. Employs the standard household equivalent for converting teaspoons to milliliters in oral dosing.

23. What is the infusion rate in $\text{mL/hr}$ for $1000\,\text{mL}$ to infuse over $8\,\text{hr}$?

    $125\,\text{mL/hr}$. Divides the total volume by the infusion duration to obtain the hourly rate.

24. What is the dose in $\text{mL}$ if the order is $500\,\text{mg}$ and supply is $250\,\text{mg}/5\,\text{mL}$?

    $10\,\text{mL}$. Scales the volume proportionally using the ratio of ordered dose to available concentration.

25. What is the dose in $\text{mcg}$ if the order is $0.2\,\text{mg}$?

    $200\,\text{mcg}$. Converts milligrams to micrograms by multiplying by 1000 according to metric prefixes.

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