Horse tranquiliser used to treat Human depression ?

Quite frankly, bizarre.

Ketamine, an anesthetic and also club drug Special K, has the "power" (my quotes) to lift depression within hours, instead of the weeks it typically takes prescription antidepressants to kick in, a new US federal study suggested yesterday.

http://www.boston.com/yourlife/health/mental/articles/2006/08/08/drug_may_quickly_lift_depression_study_says/