Final answer:
Medical and pharmaceutical personnel use average dosages to ensure accurate dosing and minimize the risk of side effects.
Step-by-step explanation:
The fact that medications are prepared in average dosages is used by medical and pharmaceutical personnel to ensure accurate dosing and to minimize the risk of side effects. Average dosages are determined based on factors such as the patient's age and body mass, as well as how the drug is metabolized and eliminated from the body. By using average dosages, healthcare professionals can calculate the correct dose for a patient and avoid the potential harm or ineffectiveness that can result from incorrect dosing.