Ketamine, the horse tranquilizer/club drug also known as "Special K", could help people with depression, according to a new study.

Their study, published in the Archives of General Psychiatry, found ketamine restores to normal the orbifrontal cortex, an area of the brain located above the eyes that is overactive in depressed people.

The area is believed to be responsible for feelings of guilt, dread, apprehension and physical reactions such as a racing heart, said Bill Deakin, who led the study.

http://www.reuters.com/article/scienceNews/idUSL0284213220080502