Final answer:
Scheduled Listed Chemical Products (SLCPs) are regulated by the DEA and include some over-the-counter cough medicines that contain ingredients used in drug production. They are not exclusive to prescription or veterinary use.
Step-by-step explanation:
The question is inquiring about Scheduled Listed Chemical Products (SLCPs) and their regulation status. SLCPs are indeed regulated by the Drug Enforcement Administration (DEA). These regulations pertain to certain over-the-counter (OTC) medications that have ingredients potentially used in the illicit production of drugs such as methamphetamine. It is not correct that these are exclusive to prescription or veterinarian use; some cough medicines available over the counter do contain ingredients that classify them as SLCPs.