Final answer:
Opioid poisoning can present with clinical features such as constricted pupils, slowed breathing, reduced consciousness, and pinpoint pupils. Other symptoms may include drowsiness, confusion, and respiratory depression.
Step-by-step explanation:
Opioid poisoning can cause distinctive clinical features and symptoms. Some of the common clinical features include constricted pupils, slowed breathing, reduced consciousness, and pinpoint pupils that do not react to light. Other symptoms may include drowsiness, confusion, slowed or irregular heartbeat, low blood pressure, and respiratory depression.