A 20 lb puppy needs metoclopramide for vomiting. The dose is 2 mg/kg. The drug concentration is 5 mg/mL. How many mL will you draw up?
To calculate the number of milliliters (mL) you need to draw up, you'll need to determine the appropriate dose for the 20 lb puppy and then convert it into milliliters based on the concentration of the drug.
Step 1: Convert the puppy's weight from pounds to kilograms.
Since the dose is measured in mg/kg, we need to convert the weight from pounds to kilograms. There are 2.2 pounds in 1 kilogram.
20 lb / 2.2 lb/kg = 9.09 kg (rounded to two decimal places)
Step 2: Calculate the dose based on the puppy's weight.
The dose is given as 2 mg per kilogram of body weight. Multiply the weight (in kilograms) by the dose:
9.09 kg × 2 mg/kg = 18.18 mg (rounded to two decimal places)
Step 3: Determine the volume of the drug based on its concentration.
The drug concentration is given as 5 mg/mL. We can now calculate the volume needed to provide 18.18 mg of the drug. Divide the dose by the concentration:
18.18 mg / 5 mg/mL = 3.64 mL (rounded to two decimal places)
Therefore, you need to draw up approximately 3.64 mL of metoclopramide for the 20 lb puppy.