Medication Calculations: Master Dosage Conversions and Dilution Principles

Question 1

To prepare 100 mL of a 50 mg/mL solution by diluting a concentrated 200 mg/mL solution, what volume of the concentrated solution is needed?

Accepted Answer

25 mL

Answer

100 mL

Answer

200 mL

Answer

50 mL

Question 2

Which factor is NOT considered when calculating medication doses?

Accepted Answer

Patient's height

Answer

Medication's half-life

Answer

Patient's weight

Answer

Patient's age

Question 3

1.2 g of medication is prescribed. How many milligrams should be administered?

Accepted Answer

1200

Answer

120

Answer

12

Answer

12000

Question 4

Which is a legal and ethical consideration when calculating and administering medications?

Accepted Answer

Verifying the patient's identity and allergies

Answer

Administering medications without a doctor's order

Answer

Ignoring the patient's preferences

Answer

Assuming the patient's weight without measurement

Question 5

What is the primary purpose of calculating medication doses accurately?

Accepted Answer

To ensure patient safety and optimal treatment outcomes

Answer

To satisfy legal requirements only

Answer

To reduce the cost of healthcare

Question 6

Which of the following is a common error to avoid when calculating medication doses?

Accepted Answer

Using an incorrect conversion factor

Answer

Rounding numbers appropriately

Answer

Including units in the final answer

Answer

Checking the calculation with another healthcare professional

Question 7

A patient requires 125mg of a medication that is supplied as a 250mg/5ml solution. How many milliliters should be administered?

Accepted Answer

2.5 ml

Answer

1.25 ml

Answer

5 ml

Answer

10 ml

Question 8

Convert 0.75 grams to milligrams.

Accepted Answer

750 mg

Answer

7.5 mg

Answer

75 mg

Answer

7500 mg

Question 9

A prescription instructs you to dissolve 1 gram of medication in 250ml of saline. What is the final concentration of the solution?

Accepted Answer

4mg/ml

Answer

40mg/ml

Answer

2.5mg/ml

Answer

0.4mg/ml

Question 10

A child weighs 30 kg and needs a medication with a dosage of 2mg/kg/day. The medication is given twice a day.  How much medication should be administered per dose?

Accepted Answer

30 mg

Answer

60 mg

Answer

15 mg

Answer

120 mg

Question 11

You need to prepare 500ml of a 1:10 solution.  How much concentrate should you use?

Accepted Answer

50 ml

Answer

250 ml

Answer

100 ml

Answer

10 ml

Question 12

An infusion pump is set to deliver 100ml of fluid over 4 hours. What is the required flow rate in ml/hour?

Accepted Answer

25 ml/hour

Answer

50 ml/hour

Answer

10 ml/hour

Answer

40 ml/hour

Question 13

A patient's weight is recorded as 11 stone. What is the patient's weight in kilograms? (1 stone = 6.35 kg)

Accepted Answer

70.85 kg

Answer

693 kg

Answer

154 kg

Answer

17.35 kg

Question 14

A medication vial contains 1g of powder. You need to reconstitute it with 10ml of sterile water to create a 100mg/ml solution. How many milliliters of this solution should be drawn up for a 250mg dose?

Accepted Answer

2.5 ml

Answer

10 ml

Answer

1 ml

Answer

5 ml

Question 15

A patient is prescribed 500mg of paracetamol every 4 hours, with a maximum daily dose of 2g. What is the maximum number of doses the patient can safely receive in a day?

Accepted Answer

4 doses

Answer

6 doses

Answer

12 doses

Answer

8 doses

Question 16

An order is placed for 1 litre of 0.9% saline solution. How many grams of sodium chloride are present in this solution?

Accepted Answer

9 grams

Answer

0.9 grams

Answer

90 grams

Answer

900 grams

Question 17

A patient needs 500ml of intravenous fluid over 8 hours. What is the flow rate in ml/hour?

Accepted Answer

62.5 ml/hour

Answer

50 ml/hour

Answer

125 ml/hour

Answer

100 ml/hour

Question 18

Convert 1.5 litres to millilitres.

Accepted Answer

1500 ml

Answer

150 ml

Answer

15 ml

Answer

15000 ml

Question 19

A doctor orders 500mg of medication to be diluted in 100ml of saline. What is the concentration of the solution in mg/ml?

Accepted Answer

5 mg/ml

Answer

10 mg/ml

Answer

0.5 mg/ml

Answer

50 mg/ml

Question 20

A patient needs 10mg of medication per kg of body weight. The patient weighs 70kg. What is the total dosage?

Accepted Answer

700mg

Answer

70mg

Answer

7000mg

Answer

7mg

Question 21

Convert 2.5mg to micrograms.

Accepted Answer

2500 mcg

Answer

25 mcg

Answer

25000 mcg

Answer

250 mcg

Question 22

A medication is available in a concentration of 250mg/5ml. How many ml should be administered to deliver a 500mg dose?

Accepted Answer

10 ml

Answer

2 ml

Answer

5 ml

Answer

20 ml

Question 23

A patient is receiving 100ml of intravenous fluids per hour. How many ml will they receive in 6 hours?

Accepted Answer

600 ml

Answer

60 ml

Answer

1000 ml

Answer

1600 ml

Question 24

A medication is available as a 10% solution. How many mg of medication are present in 5 ml of the solution?

Accepted Answer

500 mg

Answer

1000 mg

Answer

50 mg

Answer

100 mg

Question 25

A patient needs 25mg of a medication three times a day. What is the total daily dosage?

Accepted Answer

75 mg

Answer

50 mg

Answer

25 mg