Posted in Web Ketamine Pharmacology: An Update – PubMed Central (PMC) March 25, 2026 For more than 50 years, ketamine has proven to be a safe anesthetic drug with potent analgesic properties. The active enantiomer is S (+)‐ketamine. Ketamine is mostly metabolized in norketamine, an active metabolite. https://pmc.ncbi.nlm.nih.gov/articles/PMC6493357/