The prescription is 0.075 mg by injection. The ampoule is labelled 50 micrograms per mL. What volume V do you draw up?
Dosage calculations worksheet with answers
1.Easy
0.075 mg50 mcg/mL
V = mL
2.Easy
The prescription is 0.75 mg of a drug. The tablets contain 250 micrograms (mcg) each. How many tablets n do you give?
0.75 mg250 mcg/tablet
n = tablets
3.Medium
How many milligrams of drug m are in 2 mL of a 20% (w/v) solution?
20% w/v2 mL
m = mg
4.Medium
A prefilled syringe of epinephrine (adrenaline) is labelled 1:10 000 (0.1 mg/mL). The prescription is 1 mg IV in cardiac arrest. What volume V do you give?
1:10 0001 mg
V = mL
5.Hard
The prescription is 3100 units of a drug that comes as 5000 units/mL. Draw up the dose in the 1 mL syringe: what volume V do you give?
3100 units5000 units/mL
V = mL
6.Hard
A patient is 132 cm tall and weighs 26 kg. The prescription is 175 mg/m². Using the Mosteller formula BSA = √(height (cm) × weight (kg)/3600), find the dose D in mg.
132 cm26 kg175 mg/m²
D = mg
Answer key
- 1. V = 1.5 mL
- 2. n = 3 tablets
- 3. m = 400 mg
- 4. V = 10 mL
- 5. V = 0.62 mL
- 6. D = 170.9 mg
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