Which agent is associated with a lower incidence of apnea among the options?

• A. Alfaxalone
• B. Propofol
• C. Telazol
• D. Ketamine

Answer: (A)

During induction, how an agent affects breathing is the key idea. Propofol is well known for causing dose-dependent respiratory depression and often leads to apnea right after a bolus. Ketamine tends to preserve spontaneous ventilation and airway reflexes, so apnea is less common, though it can occur in certain scenarios. Telazol can cause variable respiratory depression and brief apnea, especially with rapid or high-dose administration. Alfaxalone, on the other hand, tends to induce hypnosis with relatively milder suppression of the brainstem respiratory centers, resulting in a lower incidence of apnea during induction. Because reducing apnea risk is important in patients with airway concerns, alfaxalone is the best choice among these options for this purpose.