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Amoxicillin 500 mg is ordered for a patient with a sinus infection. Amoxicillin oral suspension 200 mg per 5 mL is available.
How many mL should the nurse administer?

A.

5.5 mL

B.

10.5 mL

C.

12.5 mL

D.

15.5 mL

Answer and Explanation

The Correct Answer is C

The nurse should administer 12.5 mL of amoxicillin oral suspension.

This answer is correct because it is based on a simple ratio and proportion calculation. The nurse can set up a proportion as follows:

200 mg / 5 mL = 500 mg / x mL

Cross-multiplying and solving for x gives:

x = 12.5 mL

Therefore, the nurse should administer 12.5 mL of amoxicillin oral suspension to deliver 500 mg of the medication to the patient.
 


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Related Questions

Correct Answer is B

Explanation

The nurse should administer 60 mL of the supplement in a day.

This answer is correct because it is based on a simple unit conversion and multiplication calculation. The nurse can convert 60 mEq to 20 mL by using the ratio given on the botle label, as follows:

30 mEq / 10 mL = 60 mEq / x mL

Cross-multiplying and solving for x gives:

x = 20 mL

Therefore, the nurse should administer 20 mL of the supplement to deliver 60 mEq of the medication to the patient. Since the order is for three times a day, the nurse should multiply 20 mL by 3 to get the total daily dose, which is 60 mL.

Correct Answer is D

Explanation

To answer this question, we need to calculate the infusion rate in mL per hour by using the following formula²:

Infusion rate (mL/h) = Dose (mcg/kg/min) × Weight (kg) × 60 min/h × Volume (mL) / Concentration (mcg/mL)

In this case, the infusion rate is:

Infusion rate (mL/h) = 3 mcg/kg/min × 70 kg × 60 min/h × 250 mL / 2500 mg

We need to convert lb to kg by dividing by 2.2

Infusion rate (mL/h) = 3 mcg/kg/min × (154 lb / 2.2 kg/lb) × 60 min/h × 250 mL / 2500 mg

We need to convert mg to mcg by multiplying by 1000:

Infusion rte (mL/h) = 3 mcg/kg/min × (154 lb / 2.2 kg/lb) × 60 min/h × 250 mL / (2500 mg × 1000 mcg/mg)

We can simplify the equation by canceling out some units and numbers:

Infusion rate (mL/h) = 3 × 154 × 250 / (2.2 × 2500 × 1000)

We can use a calculator to get the final answer:

Infusion rate (mL/h) = 12.6363636363636 mL/h

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