Which alpha-2 agonist is FDA-approved in horses and used as a premed prior to general anesthesia?

Which alpha-2 agonist is FDA-approved in horses and used as a premed prior to general anesthesia?

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

Answer: (A)

Alpha-2 agonists provide sedation and analgesia by reducing central sympathetic outflow, making them useful as premeds before anesthesia in horses. Among the options, romifidine is the alpha-2 agonist that carries FDA labeling for equine use as a premed. It gives reliable sedation and analgesia with a smoother, more controlled response and typically less ataxia than some other alpha-2 options, which helps when preparing a horse for induction. The other two drugs listed are anticholinergics, not alpha-2 agonists, so they don’t fit the class or the intended use. As with any alpha-2 agonist, clinicians monitor for bradycardia, hypotension, and reduced GI motility and adjust dosing accordingly.