Ketamine is classified as what type of drug?

• A. Opioid
• B. Dissociative
• C. Local anesthetic
• D. Anticholinergic

Answer: (B)

Ketamine is classified as a dissociative drug. It creates a dissociated state where the person feels detached from the environment, often with analgesia and amnesia, while typically preserving airway reflexes and spontaneous breathing. This effect comes from its action as an NMDA receptor antagonist, which disrupts excitatory signaling in key brain circuits involved in perception, memory, and integration of sensory input, leading to the characteristic dissociated anesthesia.

This is different from opioids, which primarily activate mu receptors to produce strong analgesia and can depress respiration; from local anesthetics, which block sodium channels to numb a localized area; and from anticholinergics, which block acetylcholine receptors and cause delirium, dry mouth, rapid heartbeat, and other systemic effects. Ketamine’s unique mechanism and clinical profile place it squarely in the dissociative category.