- A method similar to ratio and proportion but expressed as fractions.
- Where in:
- D = Desired dose or dose ordered by the primary care provider.
- H = dose on hand or dose on the label of bottle, vial, ampule.
- V = vehicle or the form in which the drug comes (i.e., tablet or liquid).
FRACTIONAL EQUATION METHOD
Order: Digoxin 0.25 mg
On hand: Digoxin 0.125 mg tablets
Desired (D) = 0.25 mg
On hand (H) = 0.125 mg
Vehicle (V) = 1 tablets
Answer: 2 tablets