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A child who weighs 18 pounds recieves a prescription for amoxicillin 25 mg/kg/day by mouth in divided doses every 12 hours. The bottle labeled, "Amoxicillin for Oral Suspension, USP 400 mg per 5 mL." How many mL should the nurse administer with each dose? (Enter numerical value only. If rounding is required, round to the nearest tenth.)

Answer and Explanation

The Correct Answer is ["1.3"]

Given:

Ordered dose of amoxicillin: 25 mg/kg/day

Child's weight: 18 pounds

Concentration of amoxicillin suspension: 400 mg/5 mL

Step 1: Convert child's weight from pounds to kilograms:

1 pound (lb) = 0.453592 kilograms (kg)

Child's weight in kg = 18 lbs x 0.453592 kg/lb = 8.164656 kg

Step 2: Calculate the total daily dose of amoxicillin:

Total daily dose (mg) = Ordered dose (mg/kg/day) x Child's weight (kg)

Total daily dose (mg) = 25 mg/kg/day x 8.164656 kg

Total daily dose (mg) = 204.1164 mg/day

Step 3: Calculate the dose per administration:

Since the medication is given every 12 hours, there are 2 administrations per day.

Dose per administration (mg) = Total daily dose (mg) / Number of administrations per day

Dose per administration (mg) = 204.1164 mg/day / 2 administrations/day

Dose per administration (mg) = 102.0582 mg

Step 4: Calculate the volume to be administered per dose:

Volume (mL) = Dose per administration (mg) / Concentration (mg/mL)

Volume (mL) = 102.0582 mg / (400 mg/5 mL)

Volume (mL) = 102.0582 mg x (5 mL / 400 mg)

Volume (mL) = 1.2757275 mL

Step 5: Round to the nearest tenth:

Volume (mL) ≈ 1.3 mL

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Free Nursing Study Resources

Correct Answer is ["60"]

Explanation

Given:

Ordered dose: 25 mL PO every 6 hours PRN

Medication label: "Acetaminophen and Codeine Phosphate Oral Solution, USP: 120/12 mg per 5 mL"

Step 1: Determine the concentration of codeine in the solution:

Concentration of Codeine = Amount of Codeine / Volume of Solution

Concentration of Codeine = 12 mg / 5 mL

Concentration of Codeine = 2.4 mg/mL

Step 2: Calculate the amount of codeine per dose:

Amount of Codeine per Dose = Concentration of Codeine x Volume per Dose

Amount of Codeine per Dose = 2.4 mg/mL x 25 mL

Amount of Codeine per Dose = 60 mg

Correct Answer is ["4"]

Explanation

Given:

Ordered dose of Cefixime: 80 mg

Concentration of Cefixime suspension: 100 mg per 5 mL

Step 1: Set up the proportion:

Desired dose (mg) / Volume to administer (mL) = Concentration (mg/mL)

Step 2: Substitute the values:

80 mg / Volume = 100 mg/5 mL

Step 3: Solve for the unknown volume:

Volume = 80 mg / (100 mg/5 mL)

Volume = 80 mg x (5 mL / 100 mg)

Volume = 4 mL

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Naxlex Comprehensive Predictor Exams

Correct Answer is ["60"]

Explanation

A child with an infection receives prescription for cefixime 80 mg by mouth every 12 hours. The bottle is labeled, Cetixime for Oral Suspension, USP 100 mg 5 mL. How many mL should nurse administer? (Enter numerical value only.)

Correct Answer is ["4"]

Explanation

The healthcare provider prescribes lamivudine oral solution 150 mg twice daily for a client who is HIV positive. The available bottle contains 240 mL of lamivudine labeled, 10 mg/mL. How many mL should the nurse administer in a 24 hour period? (Enter numeric value only.)

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