Why are heroin users more likely to overdose when they inject heroin someplace other than their usual location?
A) Heroin users tend to inject a larger dose in new locations.
B) Heroin users learn to associate safe practices with their usual location.
C) Heroin users find drug use more rewarding in new locations.
D) Cues that normally trigger a conditioned response that helps to prepare the body for the heroin are missing in the
Answer: D
Rationale: Conditioned drug tolerance develops as the body begins associating environmental cues that accompany drug use with the drug itself. The conditioned responses involve responses that prepare the body for something potentially dangerous. Over time, more of the drug is needed to override these preparatory responses so that the desired effect can be obtained. This can lead to overdoses if this same dose is used without the presence of the environmental cues.
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