Ketamine is often half-jokingly called a “horse tranquilizer” because of its use in veterinary medicine, but that label vastly underplays its significance and potential. It’s a dissociative ...

Johnson, who has previously undergone plasma exchanges and stem cell injections, injected himself with the horse tranquilizer ketamine and tracked his brain activity for 15 days to study its effects.

Ketamine, a powerful horse tranquilizer and anaesthetic, is an increasingly popular recreational drug of choice for teenagers, according to the latest government crime survey for England and Wales.

Commonly dismissed as “horse tranquilizer,” ketamine’s “predominant legitimate use is as a veterinary anesthetic,” the U.S. Department of Justice points out. But it’s often used ...