Which of the following is a classification of opioids?

Heroin is classified as an opioid because it is derived from morphine, which is a naturally occurring substance extracted from the seed pod of the opium poppy plant. Opioids are a group of substances that include both natural and synthetic compounds that act on the opioid receptors in the brain, leading to pain relief, euphoria, and in some cases, dependence and addiction.

Benzodiazepines, on the other hand, are a different class of medications primarily used for their sedative and anxiolytic effects, and they do not act on opioid receptors. Tylenol (acetaminophen) is an analgesic and antipyretic, but it is not an opioid; it works through different pathways in the brain and body without affecting opioid receptors. Similarly, acetaminophen is not an opioid and is primarily used to relieve pain and reduce fever. In contrast, the classification of heroin clearly aligns with the characteristics and effects associated with opioids.