The health-care provider prescribes trimethoprim-sulfamethoxazole (Bactrim-DS Oral Suspension) 120 mg BID for a child with bronchitis. The Bactrim bottle is labeled "200 mg/5ml." How many ml should the nurse administer at each dose? (Enter the numeric value, whole number, only.)
The Correct Answer is ["3"]
Calculating the Trimethoprim-Sulfamethoxazole Dose
Problem: Administer 120 mg of Bactrim-DS Oral Suspension. The available concentration is 200 mg/5 mL.
Steps:
Set up a proportion:
We want to find the number of milliliters (mL) needed.
We know the desired dose (120 mg) and the concentration of the medication (200 mg/5 mL).
Proportion:
x mL / 120 mg = 5 mL / 200 mg
Cross-multiply:
200x = 600
Solve for x:
x = 600 / 200
x = 3
Answer: The nurse should administer 3 mL of Bactrim-DS Oral Suspension per dose.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["1"]
Explanation
To calculate the number of tablets needed, we can set up a proportion:
x tablets / 0.05 mg = 1 tablet / 0.1 mg
Cross-multiplying:
0.1x = 0.05
Solving for x:
x = 0.05 / 0.1
x = 0.5
Therefore, the nurse should administer 0.5 tablets of levothyroxine sodium (Synthroid).
Since we cannot administer a fraction of a tablet, we round up to the nearest whole number.
So, the nurse should administer 1 tablet.
Correct Answer is C
Explanation
To calculate the volume of amoxicillin to be administered, we can use the following formula:
Volume (mL) = Desired Dose (mg) / Concentration (mg/mL)
Plugging in the given values:
Volume (mL) = 500 mg / 125 mg/mL
Calculating the result:
Volume (mL) = 20 mL
Therefore, the nurse should administer 20 mL of amoxicillin.
The correct answer is C. 20 ml.
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