What does the term half-life of a drug refer to?
A) Its tolerance level when the drug is used frequently
B) Its biotransformation as it accumulates in the body
C) Its duration of action, indicating how much drug is effective at different times as the percent of concentration decreases over time
D) Its concentration in the patient/client's blood or serum through the use of lab tests to measure the therapeutic level

Question

Quizplus · Accepted Answer

The half-life of a drug, which correlates roughly with its duration of action, indicates how often the drug may be given to continue therapeutic effect. Tolerance occurs when the patient/client requires more of a drug when it is used frequently. Cumulation occurs when a condition inhibits biotransformation or excretion and the drug accumulates in the body. The therapeutic range evaluates the effects of drug therapy in the patient/client's blood or serum through the use of laboratory tests that measure the therapeutic level.

What Does the Term Half-Life of a Drug Refer To