Final answer:
The term for the amount of time it takes for a drug to demonstrate its full therapeutic effect is half-life.
Step-by-step explanation:
The term for the amount of time it takes for a drug to demonstrate its full therapeutic effect is half-life. The half-life of a drug refers to the time it takes for 50% of the drug to be eliminated from the plasma. It can vary greatly between drugs, with some drugs having a short half-life requiring multiple doses per day, and others having a longer half-life that allows for once-daily dosing.