What symptom is least likely associated with opiate abuse?

In the context of opiate abuse, tachycardia is least likely to be a characteristic symptom. Opioids primarily act as central nervous system depressants, which generally leads to a decrease in heart rate rather than an increase. The classic symptoms associated with opiate use include euphoria, which is a common psychological effect as users experience a sense of well-being. Constricted pupils, known as miosis, are a hallmark sign of opiate usage, reflecting the drug’s effect on the body’s autonomic nervous system. Drowsiness is also prevalent, as opioids can induce significant sedation and lethargy. In contrast, tachycardia, or an increased heart rate, is more often observed with stimulant drug use or withdrawal from opioids rather than during opioid intoxication. Therefore, the connection between opiate abuse and tachycardia is comparatively weak.