Which drug is a narcotic derived from morphine?

Heroin is classified as a narcotic that is derived from morphine, a naturally occurring substance extracted from the opium poppy. The process of creating heroin involves chemically modifying morphine, which enhances its potency and alters its pharmacological effects. Heroin acts primarily as a powerful central nervous system depressant, leading to feelings of euphoria and pain relief, but it also carries a high risk of addiction and overdose.

The other options listed do not share this relationship with morphine. Cocaine, for example, is a stimulant obtained from coca leaves, while amphetamines are synthetic drugs that increase alertness and energy. LSD is a hallucinogenic drug derived from ergot, a fungus, and does not fall within the narcotic category. Understanding the characteristics and classifications of these substances is crucial for recognizing their differing impacts on the body and potential for abuse.