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First human tests of antidepressant bupropion as methamphetamine addiction treatment hold promise

A new study led by researchers at UCLA's Semel Institute suggests the antidepressant bupropion may help treat methamphetamine addiction. No medications presently are approved for treating methamphetamine addicts.

Appearing Nov. 23 as an advance online publication of the peer-reviewed journal Neuropsychopharmacology, the study finds bupropion blunts the methamphetamine "high" and reduces cravings prompted by visual cues such as ambient drug use.

The research team hypothesizes that bupropion reduces the effects of methamphetamine by preventing the drug from entering brain cells, where methamphetamine can produce release of neurotransmitters that cause feelings of euphoria.

The study is the first to examine the effectiveness of bupropion for treating methamphetamine addiction in humans. A multisite Phase II clinical trial led by UCLA researchers is in progress.

"Finding new, effective ways to treat methamphetamine addiction is a key component of bringing the ongoing epidemic of abuse under control," said Dr. Thomas F. Newton, the study's principal investigator and professor at the Semel Institute for Neuroscience and Human Behavior.

"Bupropion's novel effect on the brain is what makes this line of research so promising," added Newton, who also is a professor of psychiatry and biobehavioral sciences at the David Geffen School of Medicine at UCLA. "These findings may point the way toward medications with even greater potential to be helpful."

Twenty of 26 participants enrolled in the project completed the study. Participants were active methamphetamine users between ages 18 and 45. Researchers randomly assigned each participant to receive treatment either with a placebo -- an inactive ingredient such as a sugar pill -- or bupropion.

Each participant received a series of three intravenous doses of methamphetamine as the study began and a second, identical series of doses six days after treatment with placebo or b
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Contact: Dan Page
dpage@mednet.ucla.edu
310-794-2265
University of California - Los Angeles
28-Nov-2005


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