The physician ordered 2/3 strength Ensure 6 oz PO q4h for 24 hrs. What is the total volume in mL you would administer in 24 hrs?

Given:

Ordered dose of phenobarbital: 6 mg/kg/day divided equally every 12 hours

Patient weight: 44 lbs

Concentration of phenobarbital elixir: 20 mg/5 mL

Step 1: Convert patient weight from pounds to kilograms:

1 pound (lb) = 0.453592 kilograms (kg)

Patient weight in kg = 44 lbs x 0.453592 kg/lb = 19.958 kg

Step 2: Calculate the total daily dose of phenobarbital:

Total daily dose (mg) = Ordered dose (mg/kg/day) x Patient weight (kg)

Total daily dose (mg) = 6 mg/kg/day x 19.958 kg

Total daily dose (mg) = 119.748 mg/day

Step 3: Calculate the dose per administration:

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

Dose per administration (mg) = 119.748 mg/day / 2 administrations/day

Dose per administration (mg) = 59.874 mg

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

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

Volume (mL) = 59.874 mg / (20 mg/5 mL)

Volume (mL) = 59.874 mg x (5 mL / 20 mg)

Volume (mL) = 14.9685 mL

Step 5: Round to the nearest whole number:

Volume (mL) ≈ 15 mL

A) Drug Enforcement Administration (DEA)
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D) National Institutes of Health (NIH)
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