"Special K" is a slang term for ketamine, a dissociative anesthetic used medically for anesthesia and pain management but also abused recreationally for its hallucinogenic and dissociative effects

. It is commonly found in crystalline powder or liquid form and is popular in nightclub, rave, and festival scenes

. The drug distorts perceptions of sight and sound, causes feelings of detachment from the environment and self, and can induce a trance-like or "out of body" experience often called a "K-hole"

. Street names for ketamine include Special K, K, Kit Kat, Cat Valium, and Vitamin K among others