To deliver 25 mg using a 25 mg/mL stock, what is the volume required?

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Study for the Archer Pharmacology Test to master dosage calculations and medication administration. Use flashcards and multiple choice questions with detailed explanations. Get ready for your exam!

Multiple Choice

To deliver 25 mg using a 25 mg/mL stock, what is the volume required?

Explanation:
Volume to deliver comes from dose divided by concentration. A stock of 25 mg/mL means there are 25 mg in every 1 mL. To get 25 mg, you need 25 mg ÷ 25 mg/mL = 1 mL. This approach also makes intuitive sense: half a milliliter would deliver 12.5 mg, while twice that amount (2 mL) would deliver 50 mg, and 5 mL would deliver 125 mg. So the required volume is 1 mL.

Volume to deliver comes from dose divided by concentration. A stock of 25 mg/mL means there are 25 mg in every 1 mL. To get 25 mg, you need 25 mg ÷ 25 mg/mL = 1 mL. This approach also makes intuitive sense: half a milliliter would deliver 12.5 mg, while twice that amount (2 mL) would deliver 50 mg, and 5 mL would deliver 125 mg. So the required volume is 1 mL.

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