Of the following, which provide analgesia?

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Multiple Choice

Of the following, which provide analgesia?

Explanation:
Analgesia means pain relief, not just sedation. Ketamine stands out because it blocks NMDA receptors, which helps prevent central sensitization and wind-up in the spinal cord. This reduces pain signaling and provides true analgesia, even at subanesthetic doses, and it’s commonly used in multimodal pain management. The other agents are primarily sedatives or anesthetics without intrinsic analgesic effects: midazolam mainly offers sedation, anxiolysis, and muscle relaxation; propofol and alfaxalone induce hypnosis and anesthesia through GABA-A effects but do not reliably provide analgesia on their own, so they require additional analgesics during painful procedures.

Analgesia means pain relief, not just sedation. Ketamine stands out because it blocks NMDA receptors, which helps prevent central sensitization and wind-up in the spinal cord. This reduces pain signaling and provides true analgesia, even at subanesthetic doses, and it’s commonly used in multimodal pain management. The other agents are primarily sedatives or anesthetics without intrinsic analgesic effects: midazolam mainly offers sedation, anxiolysis, and muscle relaxation; propofol and alfaxalone induce hypnosis and anesthesia through GABA-A effects but do not reliably provide analgesia on their own, so they require additional analgesics during painful procedures.

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