Anonymous asked in Science & MathematicsMedicine · 1 month ago

Can someone explain this practice dosage question?

“A patient was administered a 0.5 mL injection; the medication was drawn up from an ampule labeled 1:2000 w:v (w in grams and v in mL). How much medication in mg was the patient provided in this injection?”

I know the answer is 0.25 mg, I want to learn how to solve the question.

Thank you!

1 Answer

  • Anonymous
    1 month ago

    1:2000 w:v is the same as

    1g = 2000ml or

    2000ml = 1g

    divide both sides by 4000 to get

    0.5ml = 0.00025g or 0.25mg

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