Final answer:
Diazepam, formerly known as Valium, and other benzodiazepines like Chlordiazepoxide (Librium) act as muscle relaxants and sedatives, used by veterinary professionals for the treatment of large animals.
Step-by-step explanation:
When dealing with large animals, one agent known to serve both as a muscle relaxant and a sedative is a class of drugs known as benzodiazepines. A widely recognized member of this class is diazepam, formerly known as Valium. This drug not only acts as a tranquilizer, but also possesses analgesic properties, which means it can reduce pain without causing loss of consciousness at therapeutic doses.
At higher doses, diazepam and other benzodiazepines like Chlordiazepoxide (trade name Librium) can have narcotic effects, leading to drowsiness and potentially loss of consciousness. These properties make benzodiazepines a valuable choice for veterinary professionals when a combined effect of muscle relaxation and sedation is required during the treatment of large animals.