D stands for what in the commonly used formula for calculating drug dosages.

Desired dose or dose ordered by the primary care provider

H stands for what in the commonly used formula for calculating drug dosages.

Done on hand or dose on the label of the bottle, vail, ampule

V stands for what in the commonly used formula for calculating drug dosages.

Vehicle or the form in which the drug comes

Tablet, liquid ETC

Standard Formula

The commonly used formula for calculating drug dosages

Desired(D) x Vehicle(V)

_______________________________ = amount to administer

On Hand(H)

X stands for what in ration and proportion method

X= Amount to Administer