Which of the following is NOT a CIV substance?

Cocaine is classified as a Schedule II controlled substance under the Controlled Substances Act due to its high potential for abuse and limited medical use. In contrast, the other substances listed are categorized as CIV (Schedule IV) controlled substances.

Phenobarbital, Zolpidem, and Clonazepam all fit within the Schedule IV category, which is designated for substances that have a lower potential for abuse relative to those in higher schedules and are generally accepted for medical use in treatment. Specifically, phenobarbital is a barbiturate used as a sedative, zolpidem is a sedative-hypnotic used primarily for insomnia, and clonazepam is a benzodiazepine used to treat anxiety and seizure disorders.

Thus, understanding the scheduling and classification of controlled substances helps clarify that cocaine stands apart from the other substances by being part of a higher schedule, no longer aligning with the characteristics associated with CIV substances.