Pharmaceutical Calculations Flashcards
7 cards from real APC 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 250 mg of amoxicillin. The oral suspension is labeled 125 mg/5 mL. How many mL should be given per dose?
Answer: 10 mL
Using ratio-proportion: (250 mg ÷ 125 mg) × 5 mL = 10 mL per dose.
A prescription calls for 2.5% w/w hydrocortisone cream. How many grams of hydrocortisone are contained in a 100 g tube?
Answer: 2.5 g
A 2.5% w/w preparation contains 2.5 g of solute per 100 g of product.
A 60 kg patient requires 5 mg/kg/day of tobramycin. What is the total daily dose?
Answer: 300 mg
Total dose = 60 kg × 5 mg/kg = 300 mg/day.
A 1 in 1000 solution of epinephrine contains how many milligrams per milliliter?
Answer: 1 mg/mL
1 in 1000 means 1 g per 1000 mL, which equals 1 mg per mL.
You need to prepare 200 mL of a 2% solution from a 10% stock solution. How many mL of the stock solution are required?
Answer: 40 mL
Using C1V1 = C2V2: 10% × V1 = 2% × 200 mL, so V1 = 40 mL.
A tablet contains 0.5 mg of colchicine. A prescription requires 1.5 mg per dose. How many tablets should be given per dose?
Answer: 3 tablets
1.5 mg ÷ 0.5 mg per tablet = 3 tablets per dose.
A pediatric suspension is labeled 250 mg/5 mL. What is its concentration expressed in mg/mL?
Answer: 50 mg/mL
250 mg ÷ 5 mL = 50 mg/mL.