A 66lb child is to receive a drug 2.5 mg body weight. How many mg will the child receive? check_circle Expert Answer thumb_up thumb_down Step 1 Accurate calculation of drug dosage is important for quality treatment. The dosage of the drug can be calculated using body surface area and body weight. The most often used method to calculate drug dosage is by using body weight and the result is expressed in terms of mg/kg. Step 2