Question

The physician ordered 180 mg of Dilantin oral solution every 8 hours. The patient weighs 98 lb. The label of the drug reads 250 mg per 5 mL. How many millilitres will you administer to this patient per dose?

3.6

4.9

0.36

0.72

Answer 1

To calculate the volume of Dilantin oral solution to administer, use the prescribed dose of 180 mg and the concentration of 250 mg per 5 mL to set up a proportion. Solving the proportion results in 3.6 mL, which is the volume to be administered per dose.

Step-by-step explanation:

The question requires calculating the volume of a drug solution to administer based on the prescribed medication dose and the concentration of the medication available. The physician ordered 180 mg of Dilantin oral solution every 8 hours. The label on the drug indicates a concentration of 250 mg per 5 mL. To find out how many milliliters will be administered per dose, we use the following proportion:

250 mg / 5 mL = 180 mg / X mL

To find the X, which represents the volume in milliliters, we cross-multiply and solve for X:

(250 mg) × (X mL) = (5 mL) × (180 mg)

X = (5 mL × 180 mg) / 250 mg

X = 900 mL / 250

X = 3.6 mL

The volume of Dilantin oral solution to be administered every 8 hours is 3.6 mL.