**Question:** Which inhalational anesthetic agent has analgesic effect?

**Core Concept:** Inhalational anesthetics are volatile gases that act on the central nervous system to induce anesthesia. Analgesia, or pain relief, is one of their properties.

**Why the Correct Answer is Right:** Sevoflurane is a commonly used inhalational anesthetic agent that possesses analgesic properties. It acts by binding to the γ-aminobutyric acid type A (GABAA) receptors, which leads to the opening of chloride channels and hyperpolarization of neurons, ultimately preventing the initiation and transmission of pain signals.

**Why Each Wrong Option is Incorrect:**

A. Desflurane is another inhalational anesthetic agent, but it does not specifically target GABAA receptors for its anesthetic and analgesic effects.
B. Isoflurane, another inhalational anesthetic, also does not exclusively target GABAA receptors for its analgesic effect.
C. Propofol is a short-acting intravenous anesthetic agent primarily used for sedation and not known for its analgesic properties when compared to sevoflurane.
D. Ketamine is a dissociative anesthetic agent that produces analgesia, but it primarily acts on NMDA receptors, which is different from sevoflurane's mechanism of action on GABAA receptors.

**Clinical Pearl:** Inhalational anesthetics like sevoflurane provide not only general anesthesia but also analgesia, which is beneficial in surgical procedures where pain control is crucial for patient comfort and recovery.

**Correct Answer:** Sevoflurane