As reported on the Brain and Behavior Research Foundation website, new help may be on the way for patients who have treatment-resistant bipolar depression. In a recent research study, these bipolar patients were given a single dose of the drug ketamine two times, two weeks apart, or they were given a placebo. The ketamine group of patients demonstrated rapid improvement of their depressive symptoms in as little as 40 minutes from taking the ketamine. Some patients maintained antidepressant benefits for as long as two weeks. To read this article in its entirety, click here.