The nurse is reviewing aspects of substance abuse in preparation for a seminar. Which of these statements illustrates the concept of tolerance to an illicit substance? The person:
a. Has a physiologic dependence on a substance.
b. Requires an increased amount of the substance to produce the same effect.
c. Requires daily use of the substance to function and is unable to stop using it.
d. Experiences a syndrome of physiologic symptoms if the substance is not used.
ANS: B
The concept of tolerance to a substance indicates that the person requires an increased amount of the substance to produce the same effect. Abuse indicates that the person needs to use the substance daily to function, and the person is unable to stop using it. Dependence is an actual physiologic dependence on the substance. Withdrawal occurs when cessation of the substance produces a syndrome of physiologic symptoms.
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