Which alpha-2 agonist is FDA-approved in horses and used as a sedative to facilitate handling, examination and treatment; premed prior to general anesthesia?

Which alpha-2 agonist is FDA-approved in horses and used as a sedative to facilitate handling, examination and treatment; premed prior to general anesthesia?

• A. Detomidine
• B. Romifidine
• C. Glycopyrrolate
• D. Propantheline

Answer: (B)

Alpha-2 agonists provide sedation and analgesia by dampening sympathetic outflow in the central nervous system, making it easier to handle a horse for examination, treatment, or procedures and to reduce anesthetic needs when used as a premedication before general anesthesia. Among these drugs, the one that is FDA-approved for use in horses in the United States is detomidine. It offers reliable standing sedation and analgesia, with a rapid onset after intramuscular administration and a duration roughly an hour, suitable for handling and premedication. However, detomidine can slow heart rate and gut motility, so monitoring is important. Romifidine is another alpha-2 agonist used for standing sedation and is noted by some clinicians for causing less ataxia than detomidine, which can be advantageous for certain handling situations. But it is not FDA-approved for horses in the United States, so it does not carry the same regulatory approval status as detomidine.

Alpha-2 agonists provide sedation and analgesia by dampening sympathetic outflow in the central nervous system, making it easier to handle a horse for examination, treatment, or procedures and to reduce anesthetic needs when used as a premedication before general anesthesia. Among these drugs, the one that is FDA-approved for use in horses in the United States is detomidine. It offers reliable standing sedation and analgesia, with a rapid onset after intramuscular administration and a duration roughly an hour, suitable for handling and premedication. However, detomidine can slow heart rate and gut motility, so monitoring is important.

Romifidine is another alpha-2 agonist used for standing sedation and is noted by some clinicians for causing less ataxia than detomidine, which can be advantageous for certain handling situations. But it is not FDA-approved for horses in the United States, so it does not carry the same regulatory approval status as detomidine.