Which of the following is not an opiate?

The correct answer is that cocaine is not an opiate. Opiates are a class of drugs derived from the opium poppy and include natural compounds like morphine and codeine, as well as synthetic derivatives such as oxycodone (Oxycontin) and hydrocodone (Vicodin). Fentanyl is also a synthetic opiate that is used medically for pain management. Cocaine, on the other hand, is a powerful stimulant derived from the coca plant, and it acts primarily as a central nervous system stimulant rather than having the pain-relieving properties associated with opiates.

Recognizing the differences between stimulant drugs like cocaine and opiates is crucial in understanding their effects, potential for abuse, and the overall pharmacological classification within drug categories.