Pupil dilation is most likely associated with which of the following substances?

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Study for the BIPC Substance Abuse and Disorders Exam. Challenge yourself with a variety of questions to enhance your knowledge and strengthen your preparation. Each question comes with hints and explanations to help you understand and retain crucial information.

Multiple Choice

Pupil dilation is most likely associated with which of the following substances?

Pupil size reflects the balance between sympathetic and parasympathetic activity. Sympathetic activation widens the pupil (mydriasis) by stimulating the iris dilator muscle, while parasympathetic activity constricts it.

Cocaine is a classic stimulant that increases levels of norepinephrine in the synapse by blocking its reuptake. This boosts sympathetic tone, producing effects such as tachycardia, hypertension, sweating, and notably, pupil dilation. Opiates, in contrast, tend to cause pinpoint pupils because they enhance parasympathetic influence, not dilation. Methamphetamine can also cause dilation due to increased monoamines, and ketamine may cause some mydriasis, but cocaine is the most prototypical example of a substance associated with dilated pupils.

Pupil dilation is most likely associated with which of the following substances?

Study for the BIPC Substance Abuse and Disorders Exam. Challenge yourself with a variety of questions to enhance your knowledge and strengthen your preparation. Each question comes with hints and explanations to help you understand and retain crucial information.

Pupil dilation is most likely associated with which of the following substances?

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