The patient has taken a total of 6,000 mg of Keflex as ordered by the physician. The patient was prescribed 1 capsule every 6 hours for 6 days. What was the strength of each Keflex capsule?
125 mg
250mg
75 mg
225 mg
The Correct Answer is B
Calculation:
- Calculate the total number of capsules taken over the 6-day period.
The patient took 1 capsule every 6 hours.
Number of capsules per day = 24 hours / 6 hours/dose
= 4 capsules/day.
Total capsules taken = 4 capsules/day × 6 days
= 24 capsules.
Total amount of Keflex taken = 6,000 mg.
- Calculate the strength of each capsule.
Strength per capsule = Total amount taken (mg) / Total number of capsules
= 6,000 mg / 24 capsules
= 250 mg/capsule.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
A. Syringe 1: This syringe is the best choice because it has a 30-unit capacity and is calibrated in fine, single-unit increments. The 10-unit dose occupies a substantial portion of the syringe's total volume, making the markings clear and easy to read. This ensures the most accurate and precise measurement of the small 10-unit dose, thereby minimizing the risk of a medication error.
B. Syringe 2: This syringe is a U-100 insulin syringe with a 50-unit capacity, which is an acceptable device for insulin administration. However, for a small dose of 10 units, a syringe with a smaller total capacity is preferred.
C. Syringe 3: This syringe is an inappropriate choice for a dose of only 10 units because its capacity is far greater than the required dose. The markings are spaced widely apart, which makes it difficult to accurately and safely measure a small amount of insulin, increasing the risk of a dosing error.
D. Syringe 4: This syringe is not an insulin syringe. It is a tuberculin syringe, which is calibrated in milliliters (mL), not units. Insulin must be measured in units to ensure a safe and accurate dose.
Correct Answer is ["6.55"]
Explanation
- Convert the patient's weight from pounds (lb) to kilograms (kg)
Patient's weight in kg = 54 lb / 2.2 lb/kg
= 24.5454 kg.
- Calculate the total daily dose in milligrams (mg).
Total daily dose = Ordered dose (mg/kg/day) × Patient's weight (kg)
= 40 mg/kg/day × 24.5454 kg
= 981.816 mg/day.
- Calculate the dose per administration (since the medication is given "q8h," which is 3 doses/day).
Dose per administration = Total daily dose (mg/day) / 3 doses/day
= 981.816 mg / 3
= 327.272 mg/dose.
- Determine the concentration of the available medication.
Available is 250 mg in 5 mL.
Concentration = 250 mg / 5 mL
= 50 mg/mL.
- Calculate the volume in milliliters (mL) to administer per dose.
Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)
= 327.272 mg / 50 mg/mL
= 6.5454 mL/dose.
- Round the answer to the nearest hundredth.
= 6.55 mL/dose.
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