A nurse is providing discharge teaching to the parent of child who is prescribed diphenhydramine 75 mg elixir every 4 hr as needed. The amount available is diphenhydramine elixir 25 mg/2.5mL. How many mL should the nurse administer per dose? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["7.5"]
Determine the desired dose.
The nurse needs to administer 75 mg of diphenhydramine.
Calculate the available dose per 2.5 mL.
The available diphenhydramine is 25 mg/2.5 mL.
Calculate the volume to be administered.
Volume = Desired dose (mg) / Concentration (mg/2.5 mL) = 75 mg / (25 mg/2.5 mL) = 75 mg x (2.5 mL/25 mg) = 7.5 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["688"]
Explanation
Convert the patient's weight to kg.
The patient weighs 198 lb.
1 lb is approximately equal to 0.45 kg.
Patient's weight in kg = 198 lb * 0.45 kg/lb = 89.1 kg
Calculate the total daily dose.
Total daily dose = 15 mg/kg/day * 89.1 kg = 1336.5 mg/day
Calculate the dose per administration.
The dose is divided equally every 12 hours, so we divide the total daily dose by 2.
Dose per administration = 1336.5 mg/day / 2 = 668.25 mg
Round the dose to the nearest whole number.
Dose per administration = 668 mg
Correct Answer is ["2"]
Explanation
Determine the dose per administration.
The total daily dose is 2 grams, which is 2000 mg.
The dose is divided into four doses, so the dose per administration is 2000 mg / 4 = 500 mg.
Calculate the number of capsules per administration.
Each capsule contains 250 mg of tetracycline.
Number of capsules = Dose per administration (mg) / Capsule strength (mg) = 500 mg / 250 mg/capsule = 2 capsules.
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