Which of the following is NOT a common symptom of drug overdose?

In the context of drug overdoses, understanding the common symptoms associated with such events is crucial for effective assessment and management. Increased pupil size, also known as mydriasis, is typically associated with stimulant overdoses (like cocaine or amphetamines) rather than being a general symptom across all overdose scenarios.

In cases of opioid overdoses, for example, the pupils are often constricted (miosis) rather than dilated. Therefore, stating that increased pupil size is not a common symptom aligns with the recognition that various substances cause distinct physiological reactions.

The other symptoms—a decreased respiratory rate, agitation and confusion, and unresponsiveness—are indeed frequently observed in overdoses and reflect the various effects drugs can have on the central nervous system and overall bodily functions. Recognizing these typical symptoms is vital for emergency responders in determining the appropriate course of action for treatment and support.