A nurse is caring for a client who is taking multiple medications. Which of the following medications should the nurse identify as a controlled substance?

Rationale: A. Metoclopramide: Metoclopramide is an antiemetic and prokinetic agent used to treat nausea and gastroparesis. It is not classified as a controlled substance because it does not have potential for abuse or dependence. B. Dantrolene: Dantrolene is a muscle relaxant used to treat spasticity and malignant hyperthermia. It is not a controlled substance as it has low potential for abuse or addiction. C. Midazolam: Midazolam is a benzodiazepine used for sedation, anesthesia, and seizure management. Benzodiazepines are classified as controlled substances due to their potential for dependence, abuse, and misuse, making midazolam a controlled drug. D. Ketorolac: Ketorolac is a nonsteroidal anti-inflammatory drug (NSAID) used for short-term pain management. It is not a controlled substance because it has minimal risk for abuse or dependence.