Question

The recommended dose of a drug is 50 to 100mg/kg/day divided by 2 equal doses. The order is 200mg IM bid for a child who weighs 3000g. The drug has 1g that must be reconstituted with 3.6ml to make 1g/4ml. What is the correct volume to administer?

Answer 1

To calculate the correct volume to administer, we convert the child's weight into kilograms, calculate the dose based on this weight, and then determine the volume of medication based on the concentration post-reconstitution. The correct volume to administer per dose is 0.8 ml.

Step-by-step explanation:

The question involves calculating the correct volume of a drug to administer based on the child's weight and the recommended dose, as well as based on the drug concentration after reconstitution. The order is for 200 mg to be administered intramuscularly (IM) twice a day (bid) for a child weighing 3000 g. Given the drug needs to be reconstituted with 3.6 ml of liquid to make a 1 g/4 ml solution, we calculate the volume to administer by first determining the dosage per kilogram and then converting it into the volume based on the drug concentration after reconstitution.

First, we find the child's weight in kilograms by dividing the weight in grams by 1000:

3000 g / 1000 = 3 kg

Since the order is for 200 mg and we have a concentration of 1 g/4 ml (which is the same as 1000 mg/4 ml), we can find the volume for one dose:

(200 mg) / (1000 mg/4 ml) = 0.8 ml

This is the volume of medication that should be administered per dose.