Which of the following medications falls under Schedule II?

Morphine is classified as a Schedule II medication due to its high potential for abuse and the possibility of severe psychological or physical dependence. Schedule II drugs are considered to have accepted medical uses but also carry significant risks, requiring strict regulations regarding their prescription and dispensing. Morphine, an opioid analgesic, is commonly used to manage severe pain, but its potential for addiction and misuse is a critical concern in its classification.

In contrast, diazepam is a Schedule IV medication, indicating a lower potential for abuse. Acetaminophen is not classified under controlled substances, as it is generally recognized as safe when used appropriately. Pregabalin, while a controlled substance, falls under Schedule V, reflecting an even lower potential for abuse compared to Schedule II drugs like morphine.