The prescription is 135 mg. The stock solution contains 100 mg in 2 mL. Draw up the dose in the syringe: what volume V do you give?
Dosage calculations worksheet with answers
1.Easy
135 mg100 mg/2 mL
V = mL
2.Easy
The prescription is 0.5 mg of a drug. The tablets contain 250 micrograms (mcg) each. How many tablets n do you give?
0.5 mg250 mcg/tablet
n = tablets
3.Medium
A patient weighs 45 kg. The prescribed dose is 7.5 mg/kg per day, given in 2 equal doses. How many milligrams D are given per dose?
45 kg7.5 mg/kg/day2× per day
D = mg
4.Medium
A child weighing 9 kg is prescribed 10 mg/kg of a drug. The stock solution contains 25 mg/mL. Draw up the dose: what volume V do you give?
9 kg10 mg/kg25 mg/mL
V = mL
5.Hard
The prescription is 800 micrograms. The ampoule contains 2 mg/mL. Draw up the dose in the 1 mL syringe: what volume V do you give?
800 mcg2 mg/mL
V = mL
6.Hard
The prescription is 7700 units of a drug that comes as 10000 units/mL. Draw up the dose in the 1 mL syringe: what volume V do you give?
7700 units10000 units/mL
V = mL
Answer key
- 1. V = 2.7 mL
- 2. n = 2 tablets
- 3. D = 168.8 mg
- 4. V = 3.6 mL
- 5. V = 0.4 mL
- 6. V = 0.77 mL
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