Final answer:
In zero-order elimination, the drug is eliminated at a constant rate regardless of concentration, resulting in a constant half-life.
Step-by-step explanation:
The elimination half-life of a drug refers to the time it takes for half of the drug to be removed from the body. In the case of zero-order elimination, the drug is eliminated at a constant rate regardless of its concentration. This means that the half-life of the drug remains constant, regardless of the concentration of the drug in the body. For example, if the drug has a half-life of 4 hours, it will take 4 hours for the concentration of the drug to decrease by half, regardless of whether the initial concentration is high or low.