Ratios and Proportions

The provider orders 200 mg of a medication. The pharmacy supplies the medication as 50 mg per 1 mL.
How many milliliters will the nurse administer?

A provider prescribes 500 mL of normal saline (NS) to be infused over 4 hours. The IV pump only allows you to set the rate in mL per hour.
What flow rate should the nurse set on the pump (in mL/hr)?

A child weighing 22 lb is prescribed 15 mg/kg of acetaminophen.

1. Convert the child’s weight to kilograms (1 kg = 2.2 lb).
2. Calculate the required dose in milligrams (mg).
   What is the total dose in mg?

A powdered medication states: “Reconstitute with 3 mL of sterile water to achieve a concentration of 250 mg/mL.”
The provider orders 375 mg of the medication.
How many milliliters will the nurse administer?

A provider prescribes a 50% dextrose solution, but only 80% dextrose solution is available. Using sterile water, the nurse needs to dilute the 80% solution to make 100 mL of 50% solution.
How much of the 80% dextrose solution and how much sterile water are needed?