Which of the following substances is not classified as a benzodiazepine?

• A. Xanax
• B. Ativan
• C. Klonopin
• D. Percodan

Answer: (D)

The substance that is not classified as a benzodiazepine is Percodan. Percodan is a prescription medication that combines oxycodone, an opioid pain reliever, with aspirin, a nonsteroidal anti-inflammatory drug (NSAID). Unlike benzodiazepines, which primarily affect the central nervous system to induce sedation, relieve anxiety, or manage seizures, Percodan is specifically used for pain management.

In contrast, Xanax, Ativan, and Klonopin are all benzodiazepines, which work by enhancing the effect of a neurotransmitter called gamma-aminobutyric acid (GABA) in the brain. Each of these medications is typically prescribed for conditions such as anxiety or panic disorders and operates through similar mechanisms that can lead to sedation and other CNS-related effects. Thus, recognizing the distinct classification and function of these substances is crucial in understanding their applications in treatment and their potential for misuse or dependency.