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
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["0.5"]
Explanation
Given:
Desired dose of ibuprofen: 20 mg
Concentration of ibuprofen drops: 50 mg/1.25 mL
Step 1: Set up the proportion:
Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)
Step 2: Substitute the values:
20 mg / Volume = 50 mg/1.25 mL
Step 3: Solve for the unknown volume:
Volume = 20 mg / (50 mg/1.25 mL)
Step 4: Calculate the volume:
Volume = 20 mg / 40 mg/mL
Volume = 0.5 mL
Correct Answer is ["2"]
Explanation
1 mg = 1000 mcg
Prescribed dose: 0.4 mg Converted to mcg: 0.4 mg x 1000 = 400 mcg
Available tablets: 200 mcg each
Next, we divide the prescribed dose by the strength of the available tablets:
400 mcg / 200 mcg per tablet = 2 tablets
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