Norketamine

Chemical structure of Norketamine

Norketamine is a metabolite of the anesthetic and analgesic drug ketamine. It is formed in the body through the process of N-demethylation by the cytochrome P450 enzyme system, primarily in the liver. Norketamine retains some of the pharmacological properties of ketamine, contributing to its overall effects.

Pharmacology

Norketamine acts on the central nervous system and has been shown to interact with the NMDA receptor, similar to its parent compound, ketamine. However, it has a lower affinity for the NMDA receptor compared to ketamine. This interaction is believed to contribute to its analgesic and dissociative effects.

Metabolism

The metabolism of ketamine to norketamine occurs primarily in the liver. The enzyme CYP3A4 is mainly responsible for the N-demethylation of ketamine to norketamine. Once formed, norketamine can undergo further metabolism to produce other metabolites, such as dehydronorketamine.

Clinical Significance

Norketamine is considered to have a role in the therapeutic effects of ketamine, particularly in its use as an antidepressant. The presence of norketamine in the body may prolong the effects of ketamine, contributing to its antidepressant and analgesic properties.

Research

Research into norketamine has focused on its potential therapeutic effects and its role in the overall pharmacological profile of ketamine. Studies have investigated its effects on pain management and its potential use in treating depression.

Related pages

• Ketamine
• NMDA receptor
• Analgesic
• Antidepressant