Subcutaneous injection volume practice problems
Work each problem on paper first, rounding as the question says. Then open the answer to check it and see every step.
For study and exam practice, not for patient care. The orders in these problems are written for practice. In the clinic, follow the prescriber's order, your facility's protocols, and your pharmacy.
Problem 1
The nurse is caring for a client who has a prescription for octreotide acetate 50 mcg subcutaneously three times daily. The nurse has octreotide acetate 100 mcg/mL available. How many mL should the nurse administer? Record your answer using 1 decimal place.
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Answer: 0.5 mL
- mL = desired dose ÷ concentration.
- 50 mcg ÷ 100 mcg/mL = 0.5 mL.
- 0.5 mL is exact, so no rounding is needed.
Problem 2
The client has acromegaly and is being treated with octreotide acetate to reduce growth hormone levels. Order: octreotide acetate 50 mcg subcutaneously three times daily. Available: octreotide acetate 200 mcg/mL. How many mL should the nurse administer? Record your answer using 2 decimal places.
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Answer: 0.25 mL
- mL = desired dose ÷ concentration.
- 50 mcg ÷ 200 mcg/mL = 0.25 mL.
- 0.25 mL is exact, so no rounding is needed.
Problem 3
The nurse is caring for a client who has a prescription for cyanocobalamin 1,000 mcg subcutaneously once. The nurse has cyanocobalamin 1,000 mcg/mL available. How many mL should the nurse administer? Record your answer using a whole number.
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Answer: 1 mL
- mL = desired dose ÷ concentration.
- 1,000 mcg ÷ 1,000 mcg/mL = 1 mL.
- 1 mL is exact, so no rounding is needed.
Problem 4
The nurse is caring for a client who has a prescription for terbutaline 0.25 mg subcutaneously. The nurse has terbutaline 1 mg/mL available. How many mL should the nurse administer? Record your answer using 2 decimal places.
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Answer: 0.25 mL
- mL = desired dose ÷ concentration.
- 0.25 mg ÷ 1 mg/mL = 0.25 mL.
- 0.25 mL is exact, so no rounding is needed.
Problem 5
The nurse is caring for a client who has a prescription for enoxaparin 40 mg subcutaneously daily. The nurse has enoxaparin 150 mg/mL available. How many mL should the nurse administer? Record your answer using 2 decimal places.
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Answer: 0.27 mL
- mL = desired dose ÷ concentration.
- 40 mg ÷ 150 mg/mL = 0.266667 mL.
- 0.266667 mL is less than 1 mL, so round to the nearest hundredth: 0.27 mL.
Problem 6
Order: cyanocobalamin 100 mcg subcutaneously daily. Available: cyanocobalamin 1,000 mcg/mL. How many mL should the nurse administer? Record your answer using 1 decimal place.
Show answer and steps
Answer: 0.1 mL
- mL = desired dose ÷ concentration.
- 100 mcg ÷ 1,000 mcg/mL = 0.1 mL.
- 0.1 mL is exact, so no rounding is needed.
Problem 7
The client has acromegaly and is receiving octreotide acetate to reduce growth hormone levels. Order: octreotide acetate 50 mcg subcutaneously three times daily. Available: octreotide acetate 50 mcg/mL. How many mL should the nurse administer? Record your answer using a whole number.
Show answer and steps
Answer: 1 mL
- mL = desired dose ÷ concentration.
- 50 mcg ÷ 50 mcg/mL = 1 mL.
- 1 mL is exact, so no rounding is needed.
Problem 8
The nurse is caring for a client with acromegaly who needs ongoing hormone control. Order: octreotide acetate 50 mcg subcutaneously three times daily. Available: octreotide acetate 500 mcg/mL. How many mL should the nurse administer? Record your answer using 1 decimal place.
Show answer and steps
Answer: 0.1 mL
- mL = desired dose ÷ concentration.
- 50 mcg ÷ 500 mcg/mL = 0.1 mL.
- 0.1 mL is exact, so no rounding is needed.
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