Which of the following symptoms is NOT associated with a narcotic overdose?

In the context of narcotic overdose, the correct answer highlights a symptom that is not typically associated with this condition. Narcotics, including opioids, primarily depress the central nervous system. This can lead to symptoms such as slow, shallow breathing, which is a hallmark sign of overdose due to respiratory depression. Pupillary constriction, often termed "miosis," is another classic symptom of narcotic effects. Additionally, altered mental status can occur, where the individual may become drowsy, confused, or unresponsive.

In contrast, an increased heart rate is not a common symptom of narcotic overdose; in fact, narcotics generally cause a decrease in heart rate as they tend to have a calming effect on the body. Understanding the physiological effects of narcotics helps clarify why increased heart rate is not associated with overdose, making it the correct answer in identifying the outlier symptom.