Ketamine is best for all but which scenario?

• A. Hospitals that do not want to carry tiletamine-zolazepam
• B. Patients who weigh <7 kg
• C. Patients who no longer need sedation
• D. Patients who need extra chemical control but not necessarily general anesthesia

Answer: (C)

Ketamine is a dissociative anesthetic that provides analgesia and sedation while preserving airway reflexes and spontaneous breathing, with relatively stable cardiovascular function. This makes it a flexible choice for short, painful procedures, for chemical restraint, and in settings where a full general anesthetic isn’t needed or where a drug like tiletamine-zolazepam is not desired.

Choosing ketamine works well when a facility wants to avoid tiletamine-zolazepam, because it offers effective analgesia and sedation as a stand-alone option without that combination drug. It also suits small patients, as dosing can be tailored to a very low body weight and can be given IM or IV, providing practical, controllable sedation or induction.

But it isn’t appropriate when the animal no longer needs sedation. If the patient has returned to a calm, awake state, adding ketamine would unnecessarily deepen anesthesia and could introduce avoidable risks or a longer recovery.

Finally, ketamine is useful when you need extra chemical control but not full general anesthesia, because it can deepen sedation and provide analgesia in combination with other agents, allowing a balanced approach that preserves airway reflexes while improving control.

In summary, the scenario where ketamine is not the best fit is when the patient no longer needs sedation.