# Chapter 5: Drug calculations

Question type 1

Jane has been prescribed 1g orally of penicillin to treat her throat infection; stock syrup on hand is 250mg/5ml. How many millilitres of syrup is required for her dose?

20

Mark has been prescribed 650mg of flucloxacillin orally; stock suspension on hand is 125mg/5ml. How many millilitres of stock suspension is required per dose for him?

26

Ali has been prescribed benzyl penicillin 800mg orally; stock mixture on hand is 200mg/5ml. Calculate how many millilitres of mixture is to be given to Ali.

20

Trudi has been prescribed 100mg of paracetamol; stock syrup on hand is 125mg/5ml. How many millilitres of syrup should be given to Trudi per dose?

4

A syringe is graduated in units for use with U.40 insulin. To what graduation mark should it be filled to give a dose of 16 units, if only U.20 insulin is available?

32

Paul Bond requires an insulin injection, he is to be given a dose of 10 units and the strength of the solution is U.20. How many millilitres of insulin is to be drawn up into the syringe for injection?

0.5

Julie Moore requires an insulin injection, she is to be given a dose of 30 units and the strength of the solution is U.40. How many millilitres of insulin is to be drawn up into the syringe for injection?

0.75

Jill from Rosehip Respite Centre has been ordered 1.5g orally of penicillin for her throat infection; stock syrup on hand is 250mg/ml. What volume of syrup is required for her dose?

Patrick, an in-patient at the Eagle View Mental Health Respite Lodge, has a severe chest infection and has been prescribed 750mg flucloxacillin orally; stock suspension on hand is 500mg/2ml. How much stock suspension is required per dose for him? He is to have four doses per day. How much flucloxacillin does he receive in one day?

Amelia has a wound infection after her operation and has been ordered benzyl penicillin 600mg orally; stock mixture on hand is 150mg/2.5ml. Calculate the volume of mixture to be given to Amelia.

Tawdry has been ordered paracetamol 625mg three times a day orally to help ease her pain after having her wisdom teeth out; stock syrup on hand is 125mg/1.5ml. What volume of syrup should be given to Tawdry per dose? How much paracetamol does she receive per day?

Jill needs 6ml for her dose

Patrick needs 3ml per dose

Amelia needs 10ml per dose

Tawdry needs 7.5ml per dose

Question type 2

Simon Estra needs to take 12.5mg of Warfarin. The medicine cabinet stocks Warfarin tablets at a strength of 5mg. How many tablets does Simon need?

2.5

Jerry Connors needs to take 7.5mg of Warfarin. The medicine cabinet stocks Warfarin tablets at a strength of 5mg. How many tablets does Jerry need?

1.5

Steven d'Guy needs to take 0.005g of Warfarin. The medicine cabinet stocks Warfarin tablets at a strength of 5mg. How many tablets does Stephen need?

1

Hesta Forram needs to take 6mg of Prazosin. The medicine cabinet stocks Prazosin tablets at a strength of 2mg. How many tablets does Hesta need?

3

Marc McWords needs to take 0.002g of Prazosin. The medicine cabinet stocks Prazosin tablets at a strength of 2mg. How many tablets does Marc need?

1

Jai Mohamed needs to take 5mg of Prazosin. The medicine cabinet stocks Prazosin tablets at a strength of 2mg. How many tablets does Jai need?

2.5

Fatima Patel needs to take 0.1g of Thioridazine. The medicine cabinet stocks Thioridazine tablets at a strength of 50mg. How many tablets does Fatima need?

2

Susanna Payne needs to take 75mg of Thioridazine. The medicine cabinet stocks Thioridazine tablets at a strength of 50mg. How many tablets does Susanna need?

1.5

Ian Whitless needs to take 0.05g of Thioridazine. The medicine cabinet stocks Thioridazine tablets at a strength of 50mg. How many tablets does Ian need?

1

Warfarin comes in tablet form; the tablets that are kept in the medicine cabinet are of stock strength 5mg; they are scored. Calculate the number of tablets required for the following patients.

Jim Bow needs to have 2500mcg

Jess Rarebit needs to have 7.5mg

Alf Ensafety needs to have 0.005g

Prazosin is an antihypertensive drug which works by relaxing the blood vessels. The stock strength of the tablets kept in the medicine cabinet is 2mg per tablet; the tablets are scored. The following patients with high blood pressure are being treated with this drug once a day. Calculate the number required for the following patients.

Pur Feck needs to have 0.005g

Fan Tessie needs to have 2000mcg

Fatma Dyet needs to have 5mg

Thioridazine is in a class of drugs called phenothiazines. The strength of stock kept in the medicine cabinet is 50mg per tablet; the tablets are scored. The following patients are being treated with this drug in one daily dose. Calculate the number of tablets required for the following patients.

James Glu needs to have 0.075g

Uri Kiddin needs to have 25mg

Noah Way needs to have 0.15g

1/2 tablet

1 1/2 tablets

1 tablet

2 tablets

1 tablet

2 1/2 tablets

1 1/2 tablets

1/2 tablet

3 tablets

Question type 3

Jane has been ordered 0.75g orally of penicillin; stock syrup on hand is 250mg/5ml. How many millilitres of syrup is required for her dose?

15

Max has been prescribed 0.5g flucloxacillin orally; stock suspension on hand is 125mg/2.5 ml. How many millilitres of stock suspension is required per dose for him?

10

Alison has been ordered benzyl penicillin 700mg orally; stock mixture on hand is 250mg/5ml. How many millilitres of mixture is required for her dose?

14

Tricia has been ordered paracetamol 150mg three times a day orally; stock syrup on hand is 125mg/5ml. How many millilitres of syrup should be given to Tricia per dose?

6

Diana Vittel is prescribed a dose of 18mg of morphine. Morphine of stock strength 15mg/ml is in the medicine cabinet. Calculate how many millilitres to draw up for injection.

1.2

Jose Mercado is prescribed a dose of 7.5mg of morphine. Morphine of stock strength 15mg/ml is in the medicine cabinet. Calculate how many millilitres to draw up for injection.

0.5

Mary Nearly is prescribed a dose of 0.072g of morphine. Morphine of stock strength 15mg/ml is in the medicine cabinet. Calculate how many millilitres to draw up for injection.

4.8

Linda Myers is prescribed a dose of 70mg of pethidine. The stock strength of pethidine in the medicine cabinet is 100mg/2ml. Calculate how many millilitres to draw up for injection.

1.4

Mitac Patel is prescribed a dose of 55mg of pethidine. The stock strength of pethidine in the medicine cabinet is 100mg/2ml. Calculate how many millilitres to draw up for injection.

1.1

Rose Mint is prescribed a dose of 0.05g of pethidine. The stock strength of pethidine in the medicine cabinet is 100mg/2ml. Calculate how many millilitres to draw up for injection.

1

Daniel Agbosi is prescribed a dose of 70mg of cortisone. Cortisone of stock strength 125mg/5ml is in the medicine cabinet. Calculate how many millilitres to draw up for injection.

2.8

Hadan Ali is prescribed a dose of 45mg of cortisone. Cortisone of stock strength 125mg/5ml is in the medicine cabinet. Calculate how many millilitres to draw up for injection.

1.8

Carolyn Blean is prescribed a dose of 0.05g of cortisone. Cortisone of stock strength 125mg/5ml is in the medicine cabinet. Calculate how many millilitres to draw up for injection.

2

Morphine of stock strength 15mg/ml is in the medicine cabinet. Calculate the amount to be drawn up and the syringe size to use for injection for the following patients.

Harpa Severn is prescribed a dose of 0.15g

Happie Agen is prescribed a dose of 6mg

Whats Ittoya is prescribed a dose of 22.5mg

The stock strength of pethidine in the medicine cabinet is 100mg/2ml. Calculate the amount to be drawn up and the syringe size to use for injection for the following patients.

Janice Poplin is prescribed a dose of 0.3g

Pep Ermint is prescribed a dose of 65mg

Crystal Stone is prescribed a dose of 87mg

Cortisone of stock strength 125mg/5ml is in the medicine cabinet. Calculate the amount to be drawn up and the syringe size to use for injection for the following patients.

Bren Gunna is prescribed a dose of 0.06g

Hugh Lorrie is prescribed a dose of 150mg

Kiera Nowt is prescribed a dose of 75mg

You need to select the 10ml syringe to draw up the 10ml required for Harpa’s injection.

Select the 1ml syringe and draw up 0.4ml of morphine for Happie.

So select the 2ml syringe and draw up 1.5ml of morphine for Whats

So select the 10ml syringe and draw up 6ml of pethidine for Janice.

So select the 2ml syringe and draw up 1.3ml of pethidine for Pep.

So we select the 2ml syringe and draw up 1.74ml of pethidine for Crystal.

So select the 3ml syringe and draw up 2.4ml of cortisone for Bren.

So select the 10ml syringe and draw up 6ml of cortisone for Hugh.

So select either the 3ml or 5ml syringe and draw up 3ml of cortisone for Kiera.

Question type 4

Paula Blond requires an insulin injection; she is to be given a dose of 20 units and the strength of the solution is U.20. How many millilitres of insulin should be drawn up into the syringe for injection?

1

Juliet Moone requires an insulin injection, she is to be given a dose of 50 units and the strength of the solution is U.40. How many millilitres of insulin should be drawn up into the syringe for injection?

1.25

A syringe is graduated in units for use with U.40 insulin. To what graduation mark should it be filled to give a dose of 12 units, if only U.20 insulin is available?

24

1. Two patients newly diagnosed with diabetes at the Diabetes Clinic require insulin injections.

 Name Dose to be given Strength of solution Pauline Booker 60 units U.20 Maj Ick 30 units U.40

How much insulin is to be drawn up for these patients using the strengths given?

Pauline Brooker: 3ml

Maj Ick: 0.75ml

Question type 5

Jackson has been ordered olanzapine. His medication is to be given by intra-muscular injection. The consultant has ordered a dose of 7.5mg from your available stock of 5mg/ml. How many millilitres should you draw?

1.5

Marie has been prescribed haloperidol at a rate of 3mg per dose given 6 times a day. Her medication is available in stock ampoules of 5mg per ml. Calculate how many millilitres she requires per dose.

0.6

Alistair has been ordered selegiline transdermal treatment. The effective dosage range is between 6 and 12mg per 24 hours. Alistair's doctor has recommended a dosage of 63mg, given over a period of a week in equal amounts. Calculate how many milligrams of treatment is to be given to Alistair per day.

9

Trudi has been ordered donepezil hydrochloride. She will begin on a dose of 5mg per day for 3 weeks then 10mg for a further 3 weeks before starting on the maximum dosage of 23mg per day. What amount of donepezil hydrochloride will Trudi have had in grams after an initial 12 weeks of treatment?

1.281

Marie has been prescribed haloperidol at a rate of 3mg per dose given 6 times a day. Her medication is available in stock ampoules of 5mg per ml. Calculate how many millilitres are required for Marie's 3 day visit.

10.8

Your patient Godfrey has been ordered olanzapine, an anti-psychotic used for his schizophrenia and bipolar 1 mania. His medication is to be given by intramuscular injection (IMI) due to his current mixed episodes associated with bipolar disorder. The consultant has ordered a dose of 6.5mg from your available stock of 2.5mg/ml. What volume should you draw?

Maria has schizophrenia and also endures the effects of Tourette’s syndrome. She has been prescribed haloperidol in order to control her condition at a rate of 7.5mg per dose given three times a day. Her medication is available in stock ampoules of 5mg per 2ml. Calculate how much is required per dose.

Bart has a major depressive disorder and he has been ordered selegiline transdermal treatment. The effective dosage range is between 6 and 12mg per 24 hours. Bart’s doctor has recommended a dosage of 56mg, given over a period of a week in equal amounts. Calculate the volume of treatment to be given to Bart daily.

Madge has been ordered donepezil hydrochloride to assist in the treatment of her Alzheimer’s disease. She will begin on a dose of 5mg per day for three weeks then 10mg for a further three weeks before starting on the maximum dosage of 23mg per day. What amount of donepezil hydrochloride will Madge have had in grams after an initial 12 weeks of treatment?

So Godfrey needs 2.6ml per dose

So Maria needs 3ml per dose

8mg/day is needed by Bart

1.281g

BRAND NEW QUESTIONS/ANSWERS FOR THIS CHAPTER:

Ben Daguy weighs 55kg and is prescribed 20mg/kg/day of Chloramphenicol to be given in four doses. Calculate how much each dose is in grams. Calculate how much each dose is in grams.

Jens Mellie weighs 64kg and is prescribed 100mg/kg/day of Chloramphenicol divided into doses to be given every 6 hours for the next 24 hours. Calculate how much each dose is in grams.

Okao Fornow weighs 72kg and is prescribed 50mg/kg/day of Chloramphenicol in four equal doses. Calculate how much each dose is in grams.