Laughing Gas May Lead to New Depression Treatment

http://www.peoplespharmacy.com/2014/12/11/laughing-gas-may-lead-to-new-depression-treatment/

Research on the anesthetic ketamine has shown that it can sometimes produce a quick but not long-lasting remission from otherwise intractable depression. Scientists at Washington University in St. Louis wondered whether nitrous oxide–the so-called laughing gas sometimes used as a dental anesthetic–could produce similar benefits.

(I believe it was the infamous Dr. Gregory House who educated pain patients on ketamine.)