Additional Practice Problems for Dr. Brad’s Self-Study Dosage Calculations Course Problem Set 1 Convert the following: Example: 4.5 g to mg 𝟒𝟒.𝟓𝟓𝐠𝐠�𝟏𝟏𝟏𝟏𝟏𝟏𝟏𝟏𝐦𝐦𝐠𝐠𝐠𝐠�=𝟒𝟒𝟓𝟓𝟏𝟏𝟏𝟏𝐦𝐦𝐠𝐠You are starting with 4.5 g and you have to change that to mg. The ratio of 1000 mg/g is the tool you will use to change g to mg. The g’s cancel out leaving mg in the answer. Be sure to write out the problem. 1) 3.9 g to mg 2) 450 mg to g 3) 3.1 mg to mcg 4) 450 mL to L 5) 0.02 g to mg

Problem Set 2 Example: A patient has an order for 200 mg IV of a drug which is available as 50 mg/mL. How many mL will you administer? 𝟐𝟐𝟏𝟏𝟏𝟏𝐦𝐦𝐠𝐠 �𝟏𝟏𝐦𝐦𝐦𝐦𝟓𝟓𝟏𝟏𝐦𝐦𝐠𝐠�=𝟒𝟒𝐦𝐦𝐦𝐦These problems are done the same as the unit conversion problems. On the above problem you are converting 200 mg into mL. 1) A patient has an order for 400 mg p.o. of a medication which is available as 200 mg/5 mL. How many mL will you administer?2) The doctor has ordered a dose of 80 mg. The medication is available as 200 mg/10 mL. How many milliliters will need to be drawn up to fill the order? 3) A patient has an order for 1500 mcg. The pharmacy has 500 mcg tablets. How many tablets will be needed to fill the order? 4) A patient has an order for 500 mg of amoxicillin which is available in 250 mg capsules. How many capsules will you administer? 5) A patient has an order for 12,000 units of heparin. It is available as 10,000 units/mL in a 10 mL vial. How many milliliters will be administered?

Problem Set 3 Example: A patient has an order for 200 mg IV of a drug which is available as 50 mg/mL. How many mL will you administer? 𝟐𝟐𝟏𝟏𝟏𝟏𝐦𝐦𝐠𝐠 �𝟏𝟏𝐦𝐦𝐦𝐦𝟓𝟓𝟏𝟏𝐦𝐦𝐠𝐠�=𝟒𝟒𝐦𝐦𝐦𝐦These problems are done the same as the unit conversion problems. On the above problem you are converting 200 mg into mL. 1) The doctor has ordered a dose of 75 mg. The medication is available as 100 mg/10 mL. How many milliliters will need to be drawn up to fill the order? 2) How many mcg of levothyroxine are contained in 2 tablets of levothyroxine 0.125 mg? 3) A patient has an order for 1.2 mg. The pharmacy has 0.4 mg tablets. How many tablets will be needed to fill the order? 4) A patient will be taking 5 mL of a drug which has a strength of 25 mg/mL. How many mg will the patient be taking? 5) A prescriber has ordered 375 mg of a drug which comes in a strength of 75 mg/mL. How many mL will the patient take?