Basic Life Support (BLS) Practice Exam 2026 - Free BLS Practice Questions and Study Guide

Naloxone is not classified as an opioid because it serves a different purpose in relation to opioids. While heroin, hydromorphone, and morphine are all opioids derived from opium or synthetically produced, naloxone is an opioid antagonist. Its primary function is to reverse the effects of opioid overdose by displacing opioids from their receptors in the brain. This distinctive role makes naloxone critical in emergency situations involving opioid overdose, providing a life-saving intervention that cannot be classified as an opioid itself.