The nurse has received an order for penicillin v potassium (Penicillin-VK) suspension 0.75 g. The drug is available as 250 mg/5 ml. How many milliliters should be given?
ANSWER.
* Calculation of amount (ml) of medication required.
Formula = Desired dose/Dose in hand * Quantity.
Here
Desired dose (D) = 0.75 g.
Convert gm value to mg for calculation
1g = 1000 mg.
So
Desired dose(D) = 750 mg.
Dose in hand (H) = 250 mg.
Quantity(Q) = 5 ml.
As per formula
Amount(ml) of drug required = D/H * Q
= 750/250 * 5
= 3 * 5
= 15 ml.
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