A doctor charged with giving Matthew Perry ketamine in the month leading up to the “Friends” star’s overdose death has agreed ...

A fifth defendant, Jasveen Sangha, whom authorities said was a drug dealer known to customers as the "ketamine queen," has been charged with supplying the dose that killed Perry. She has pleaded not ...

From operating rooms to dance floors, ketamine's popularity is soaring. But what makes it so appealing - and why is it riskier than many think?