Cognitive, dissociative and psychotogenic effects of ketamine in recreational users on the night of drug use and 3 days later

Ketamine appears to induce acute and severe impairments of working, episodic and semantic memory as well as psychotogenic and dissociative effects. Three days after drug ingestion, recreational users display semantic memory impairment and dissociative and schizotypal symptomatology which could reflect chronic or residual effects of taking the drug or pre-existing differences in ketamine users.