You are not-logged in and therefore NOT taking this tutorial for credit (LOGIN
Another method of medication dosage calculation is the "fractional equation" method. You can choose which method you prefer to use.
Formula: (H / V) = (D / X)
Order : Morphine Sulfate 8 mg, IV, q 3h prn pain
H: the dosage written on the medication label or in other words, what is "on hand."
V: the "vehicle" or the form in which the medication is prepared (e.g. tablet, capsule, liquid)
D: the medication dose ordered by the physician or nurse practitioner
X: the "unknown" amount to be administered