One of the major cautions in using anticholinergic drugs is their narrow therapeutic index. The nurse knows this means:
a. it only takes a small amount of medication to treat the problem.
b. the difference between a therapeutic and toxic dose is small.
c. clients may stop taking the medication due to side effects.
d. the therapeutic level of a drug is reached quickly.
ANS: B
Feedback
A Incorrect: This is not the meaning of narrow therapeutic index.
B Correct: A narrow therapeutic index means the difference between the therapeutic dose and the toxic dose is small.
C Incorrect: This is not the meaning of narrow therapeutic index.
D Incorrect: This is not the meaning of narrow therapeutic index.
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