All of the following substances are classified as Schedule III except?

Tramadol is not classified as a Schedule III substance; instead, it is categorized as a Schedule IV controlled substance in most jurisdictions, including federal regulations. Schedule IV drugs are considered to have a lower potential for abuse compared to Schedule III substances, which include drugs with a moderate potential for dependence.

In contrast, Ketamine, Buprenorphine, and Butalbital are all classified as Schedule III medications. Ketamine is used primarily for anesthesia and certain depression treatments, Buprenorphine is commonly utilized in opioid addiction treatment, and Butalbital is often prescribed for tension headaches.

Understanding the classification of controlled substances is crucial for compliance with pharmacy regulations and helps in safe medication dispensing practices.