Learning Objective The following are the factors that affect the selection of dose for a patient:

Crawford Terry Rourke method uses the body surface area of the child to calculate the dose: (1.73 m2 is the average body surface area of an adult.)

Clark’s formula uses the body weight of the child to determine the dose and is calculated as follows: (or) (70 kg = 150 pounds is the average weight of an adult.)

Learning Objective The following formulas are based on the age of the child:

The term posology is derived from the Greek words “posos,” meaning how much, and “logos,” meaning science. It is a branch of medical science that deals with the dose or quantity of drugs that needs to be administered to a patient to get the desired pharmacological action. Dosing of drugs in infants and children requires…