Which factor does the effect of a drug depend most fundamentally upon?

Question

Quizplus · Accepted Answer

The effect of a drug depends most fundamentally on how much drug is taken. The dosage of a drug is a critical factor in determining its effects on the body. Too little may result in no effect, while too much can lead to negative reactions and potentially dangerous overdose. Body size, psychological set, and the amount of food in the stomach can also affect how drugs are absorbed and metabolized, but these factors are secondary to the amount of drug taken.

Which Factor Does the Effect of a Drug Depend Most