Calculation Skills: keeping it simple - answers

01 July 2021
Volume 3 · Issue 7

QUESTION 1

Drug A is available in 250 microgram tablets. Your patient requires 2 mg twice daily. How many tablets will the patient require each day?

  • 8 tablets

QUESTION 2

Sarah weighs 60 kg. The BNF recommends a dose of 5 mg/kg four times a day of drug B. What total amount of Drug B (in g) will Sarah take each day?

  • 1.2 g

QUESTION 3

An injection contains 0.75 g/ml of drug C. Express the amount of Drug C in mg.

  • 750 mg

QUESTION 4

Your patient has liver disease and the BNF recommends that Drug D should be prescribed at 25% of the normal adult dose. The normal adult dose is 80 mg daily. What daily dose of Drug D should the patient receive?

  • 20 mg

QUESTION 5

Intravenous infusion E is available in 1 litre bags. How many litres of fluid will be infused over 4 days if 1 litre is infused every 8 hours?

  • 12 litres

QUESTION 6

Drug F is prescribed for 28 days at a dose of 1 g twice daily. Drug F is available in 250 mg tablets. How many tablets need to be dispensed?

  • 224 tablets

QUESTION 7

Suspension G is prescribed for 2-year-old Jamie at a dose of 25 mg every 6 hours and is available at a concentration of 50 mg/5 ml. How many millilitres are required for a 7-day course?

  • 70 ml

QUESTION 8

Inhaler H has 100micrograms per actuation and contains 200 doses. You have prescribed 2 puffs twice daily for your patient. How many days will this inhaler last?

  • 50 days

QUESTION 9

Drug X is available in 10mg tablets and is prescribed in a reducing dose regime of 40 mg daily for 7 days, 30 mg daily for 7 days, 20 mg daily for 7 days then 10 mg daily for 7 days. How many tablets should be supplied?

  • 70 tablets

QUESTION 10

Drug Y is prescribed orally four times a day for 25 days and is available in 500 mg strength. What total amount of drug Y (in g) will the patient consume?

  • 50 g