An adult client receives a prescription for diphenhydramine 15 mL PO every 12 hours PRN for pruritus. The bottle is labeled, "Diphenhydramine 12.5 mg/5 mL." What is the total daily dose in mg that the client receives? (Enter numerical value only.)
The Correct Answer is ["75"]
Dose per administration in milliliters = 15 mL.
Concentration of the medication = 12.5 mg/5 mL.
- Calculate the amount of medication in milligrams (mg) per administration.
Amount per administration (mg) = Dose per administration (mL) × (Concentration (mg) / Volume (mL))
= 15 mL × (12.5 mg / 5 mL)
= 15 mL × 2.5 mg/mL
= 37.5 mg.
- Determine the number of doses per day.
Doses are given every 12 hours, so Number of doses per day = 24 hours / 12 hours/dose
= 2 doses/day.
- Calculate the total daily dose in milligrams (mg).
Total daily dose (mg) = Amount per administration (mg) × Number of doses per day
= 37.5 mg × 2 doses
= 75 mg.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.6"]
Explanation
Rationale:
- Convert the client's weight from pounds (lb) to kilograms (kg).
Weight in kg = 154 lb / 2.2 lb/kg
= 70 kg.
- Calculate the total desired dose in units.
Desired dose (units) = Desired dose (units/kg) × Weight (kg)
= 200 units/kg × 70 kg
= 14000 units.
Available concentration of the medication = 25,000 units/mL.
- Calculate the volume in milliliters (mL) to administer.
Volume (mL) = Desired dose (units) / Available concentration (units/mL)
= 14000 units / 25000 units/mL
= 0.56 mL.
- Round the answer to the nearest tenth.
= 0.6.
Correct Answer is B
Explanation
A. Notify the charge nurse the client will need assignment to the COVID-19 specified area of the facility: This is appropriate, but not the most immediate priority. Isolation must occur first to prevent viral spread before formal reassignment can be made.
B. Isolate the client from other clients, family, and healthcare workers not wearing proper PPE: This is the most urgent infection control measure. Isolation limits transmission risk while awaiting test results and is the first step in managing suspected COVID-19 cases.
C. Explain to the client to inform others that they may have been potentially exposed in the last 14 days: This is part of public health tracing but is not the nurse’s immediate clinical priority when caring for a symptomatic client.
D. Update the client and family regarding the COVID-19 vaccines that are available: Vaccine education is important for prevention but not urgent during symptomatic evaluation and isolation of a potentially infectious individual.
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