Dosage Calculations Chapter 5

Digoxin 0.125 mg is ordered for a patient who is having trouble swallowing. The bottle of digoxin elixir reads 0.5 mg/2mL. How much would you give? a. 5mL b. 0.5 mL c. 1.5 mL d. 1mL

b. 0.5 mL

Heparin 800 units is ordered for a patient. The heparin is supplied in a multidose vial that is labeled 10,000 units/mL. How many milliliters of heparin would be needed to treat this patient? a. 0.8 mL b. 0.08 mL c. 8.0 mL d. 0.4 mL

b. 0.08 mL

An order is written for 1,000 mL of normal saline to be administered IV over 10 hours. The drop factor on the IV tubing states 15 drops/mL. What is the IV flow rates? a. 50 mL/h at 50 drops/min b. 100 mL/h at 25 drops/min c. 100 mL/h at 100 drops/min d. 100 mL/h at 15 drops/min

b. 100 mL/h at 25 drops/min

A patient needs to take 0.75 g of tetracycline PO. The drug comes in 250-mg tablets. How many tablets should the patient take? a. 2 tablets b. 3 tablets c. 4 tablets d. 30 tablets

b. 3 tablets

The average adult dose of meperidine is 75 mg. What dose would be appropriate for a 10-month-old infant? a. 50 mg b. 5 mg c. 25 mg d. 0.5 mg

b. 5 mg

The usual adult dose of diphenhydramine (Benadryl) is 50 mg. What would be the safe dose for a child weighing 27lb? a. 0.9 mg b. 1.8 mg c. 9.0.mg d. 18 mg

c. 9.0.mg

Aminophylline is supplied in a 500 mg/2.5 mL solution. How much would be given if an order were written for 100 mg of aminophylline IV? a. 5 mL b. 1.5 mL c. 2.5 mL d. 0.5 mL

d. 0.5 mL

An order is written for 700 mg of ampicillin PO. The drug is supplied in liquid form as 1 g/3.5 mL. How much of the liquid should be given? a. 5 mL b. 2.5 mL c. 6.2 mL d. 2.45 mL

d. 2.45 mL