A nurse is preparing to administer diphenhydramine 40 mg. IM to a client who has allergies. Available is diphenhydramine injection 50 mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Use a leading zero if it applies. Do not use a trailing zero.)
The Correct Answer is ["0.8"]
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
40 mg / Volume = 50 mg/mL
Step 3: Solve for the unknown volume:
Volume = 40 mg / 50 mg/mL
Step 4: Calculate the volume:
Volume = 0.8 mL
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.6"]
Explanation
Given:
Desired dose of ampicillin: 150 mg
Concentration of ampicillin injection: 250 mg/mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
150 mg / Volume = 250 mg/mL
Step 3: Solve for the unknown volume:
Volume = 150 mg / 250 mg/mL
Step 4: Calculate the volume:
Volume = 0.6 mL
Correct Answer is ["6.7"]
Explanation
Given:
Desired dose of ferrous sulfate: 120 mg
Concentration of ferrous sulfate syrup: 90 mg/5 mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
120 mg / Volume = 90 mg/5 mL
Step 3: Solve for the unknown volume:
Volume = 120 mg / (90 mg/5 mL)
Step 4: Calculate the volume:
Volume = 120 mg / 18 mg/mL
Volume = 6.666666667 mL
Step 5: Round to the nearest tenth:
Volume ≈ 6.7 mL
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