Gina has been using heroin for two years. Lately, she has found she must inject higher and higher dosages of the drug to get the same "high" she has come to expect from her drug use.
Her need for higher dosages is best described as ______.
A) dependence
B) addiction
C) tolerance
D) potentiation

Question

Quizplus · Accepted Answer

Gina's need for higher dosages to achieve the same effects suggests that she has developed a tolerance to heroin, which is a common phenomenon in regular drug use.

Gina Has Been Using Heroin for Two Years