A medications half-life refers to the:
a. Concentration of a drug
b. Dose required to be therapeutic
c. Time required for the total dose of a medication to be decreased by one-half
d. Removal of a medication from the body
c
Rationale: a. Concentration refers to the amount of drug available.
b. The therapeutic index is the difference between minimal therapeutic dose and toxic level of dose.
c. Correct.
d. This defines the process of elimination.
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