List two key properties of ketamine relevant to anesthesia and two clinical cautions.

• A. Provides analgesia, maintains airway reflexes, and increases heart rate and blood pressure; caution in increased intracranial pressure and in patients with psychiatric disorders.
• B. Provides analgesia but causes respiratory depression and lowers blood pressure.
• C. Produces sedation with no analgesia.
• D. No analgesia and reduces heart rate.

Answer: (A)