Pharmaceutical Calculations Flashcards
7 cards from real PSI practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Pharmaceutical Calculations flashcards as text
A patient requires amoxicillin 250 mg. The available suspension contains 125 mg/5 mL. What volume should be dispensed per dose?
Answer: 10 mL
250 mg ÷ (125 mg/5 mL) = 10 mL per dose.
A prescription states 'paracetamol 0.5 g'. Tablets available are 500 mg. How many tablets should be dispensed per dose?
Answer: 1 tablet
0.5 g equals 500 mg, which is exactly one 500 mg tablet.
A 2% w/v solution contains how many grams of solute in 250 mL?
Answer: 5 g
2% w/v = 2 g per 100 mL; therefore 250 mL contains 2 × 2.5 = 5 g.
A morphine injection contains 10 mg/mL. A patient requires a 15 mg dose. What volume should be drawn up?
Answer: 1.5 mL
15 mg ÷ 10 mg/mL = 1.5 mL.
Digoxin tablets are available as 62.5 micrograms. A patient requires 125 micrograms per dose. How many tablets should be given?
Answer: 2 tablets
125 micrograms ÷ 62.5 micrograms = 2 tablets per dose.
How many millilitres of a 1 in 1000 adrenaline solution are required to obtain a dose of 0.5 mg?
Answer: 0.5 mL
A 1 in 1000 solution contains 1 g per 1000 mL = 1 mg/mL; therefore 0.5 mg requires 0.5 mL.
A patient weighing 70 kg is prescribed a drug at a dose of 5 mg/kg. What is the total dose required?
Answer: 350 mg
5 mg/kg × 70 kg = 350 mg total dose.