Navigation Links
Ketamine improved bipolar depression within minutes

Philadelphia, PA, May 30, 2012 Bipolar disorder is a serious and debilitating condition where individuals experience severe swings in mood between mania and depression. The episodes of low or elevated mood can last days or months, and the risk of suicide is high.

Antidepressants are commonly prescribed to treat or prevent the depressive episodes, but they are not universally effective. Many patients still continue to experience periods of depression even while being treated, and many patients must try several different types of antidepressants before finding one that works for them. In addition, it may take several weeks of treatment before a patient begins to feel relief from the drug's effects.

For these reasons, better treatments for depression are desperately needed. A new study in Biological Psychiatry this week confirms that scientists may have found one in a drug called ketamine.

A group of researchers at the National Institute of Mental Health, led by Dr. Carlos Zarate, previously found that a single dose of ketamine produced rapid antidepressant effects in depressed patients with bipolar disorder. They have now replicated that finding in an independent group of depressed patients, also with bipolar disorder. Replication is an important component of the scientific method, as it helps ensure that the initial finding wasn't accidental and can be repeated.

In this new study, they administered a single dose of ketamine and a single dose of placebo to a group of patients on two different days, two weeks apart. The patients were then carefully monitored and repeatedly completed ratings to 'score' their depressive symptoms and suicidal thoughts.

When the patients received ketamine, their depression symptoms significantly improved within 40 minutes, and remained improved over 3 days. Overall, 79% of the patients improved with ketamine, but 0% reported improvement when they received placebo.

Importantly, and for the first time in a group of patients with bipolar depression, they also found that ketamine significantly reduced suicidal thoughts. These antisuicidal effects also occurred within one hour. Considering that bipolar disorder is one of the most lethal of all psychiatric disorders, these study findings could have a major impact on public health.

"Our finding that a single infusion of ketamine produces rapid antidepressant and antisuicidal effects within one hour and that is fairly sustained is truly exciting," Dr. Zarate commented. "We think that these findings are of true importance given that we only have a few treatments approved for acute bipolar depression, and none of them have this rapid onset of action; they usually take weeks or longer to have comparable antidepressant effects as ketamine does."

Ketamine is an N-methyl-D-aspartate (NMDA) receptor antagonist, which means that it works by blocking the actions of NMDA. Dr. Zarate added, "Importantly, confirmation that blocking the NMDA receptor complex is involved in generating rapid antidepressant and antisuicidal effects offers an avenue for developing the next generation of treatments for depression that are radically different than existing ones."


Contact: Rhiannon Bugno

Related medicine news :

1. Ketamine Eased Depression in Treatment-Resistant Bipolar Disorder
2. UT Southwestern researchers uncover why ketamine produces a fast antidepressant response
3. Exercise Success for People Over 50: Reports of Improved Fitness, Circulation and Balance
4. Medical Transcription Services and EHR Provider MxSecure Launches New Enhanced Website with Goal of Improved Physician Productivity
5. Small to Mid-Sized Hospitals Turn to Orion Health to Implement Health IT Solutions for Improved Patient Care and Outcomes
6. Drug Improved Survival in Mice With Cystic Fibrosis
7. The Logo Launches New and Improved Website
8. New Study: Improved Immune System with Gene-Eden, a Natural Antiviral Supplement that Targets Chronic Viruses
9. TeraMedica Unveils Improved Univision, Now Offering a Multi-Layer Enterprise Viewing Platform
10. An improved method for calculating tumor growth
11. Improved doctor-pharmacist collaboration needed: study
Post Your Comments:
(Date:11/30/2015)... (PRWEB) , ... November 30, ... ... (AIS) is pleased to announce the speakers for “Value-Based Payer-Provider Partnerships: Three ... learned from three innovative value-based care arrangements: Essentia Health and UCare, MissionPoint ...
(Date:11/30/2015)... ... November 30, 2015 , ... Vasont Systems, a top component ... (VUI) extension unites with Syncro Soft’s latest software update, oXygen XML editor Version ... with the latest release of oXygen® XML editor and the Vasont® CCMS. ...
(Date:11/30/2015)... ... November 30, 2015 , ... Scott Newman MD, FACS ... select few plastic surgeons in the New York City area to utilize the ... world’s first heat-induced laser treatment for fat loss in the abdomen, flanks, and ...
(Date:11/30/2015)... ... November 30, 2015 , ... TransPack Volume 6 features 30 customizable ... from scrolling web-styled transitions to wipes with blur & drop shadow options. Utilize ... Seamlessly transition from one clip to the next with TransPack's easily customizable styles. ...
(Date:11/30/2015)... ... November 30, 2015 , ... ... strategic partnership at the Radiological Society of North America (RSNA) 2015 conference. ... providers of cutting-edge dictation and speech-enabled documentation software, announced their partnership today ...
Breaking Medicine News(10 mins):
(Date:11/30/2015)... iCAD, Inc. (Nasdaq: ICAD ) ... solutions for advanced image analysis and workflow tools ... Radiological Society of North American (RSNA) 2015 Annual ... November 29 to December 4, 2015. The company ... automated breast density assessment solution, PowerLook® Advanced Mammography ...
(Date:11/30/2015)... SALT LAKE CITY , Nov. 30, 2015 ... Systems (NYSE: VAR ) will exhibit a broader array ... meeting of the Radiological Society of North America ... The Varian exhibit at the meeting will feature X-ray components ... Cardinal CT tube, a line of products from Varian,s Claymount ...
(Date:11/30/2015)... Nov. 30, 2015  Novartis will demonstrate the strength ... th American Society of Hematology (ASH) Annual Meeting. ... as well as supportive care, including key findings in ... cell therapies. The ASH Annual Meeting will be held ... Novartis Oncology . "We will be presenting ...
Breaking Medicine Technology: