If the half-life of an antibiotic is 6 hours, the percentage of the original dose that will remain in a client's body 24 hours after a single dose has been administered is:
a. 4%. c. 2.5%.
b. 25%. d. 6.25%.
ANS: D
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A Incorrect: In 24 hours, the client will have more than 4% remaining.
B Incorrect: The client will have 25% remaining after 12 hours.
C Incorrect: The client will have more than 2.5% remaining.
D Correct: As each 6-hour interval (one half-life) elapses, the drug concentration in the body is further reduced by 50% of what it was at the beginning of the interval.
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