Tetrabenazine chemical structure
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Tetrabenazine

Tetrabenazine (marketed under the trade names Nitoman® in Canada and Xenazine® in New Zealand and some parts of Europe - also available in the USA as an orphan drug) is a dopamine-depleting drug that is closely related to the antipsychotics and works similarly, though its action is subtly different and it is not necessarily considered an antipsychotic itself. more...

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Common uses

Tetrabenazine is used as a treatment, but not a cure for hyperkinetic movement disorders such as:

  • Huntington's Disease - specificially the chorea associated with it
  • Tourette's Syndrome and other tic disorders
  • Tardive dyskinesia, a serious and sometimes irreversible side effect of long-term use of many antipsychotics, mainly typical antipsychotics

Side Effects

Because tetrabenazine is closely related to the antipsychotics, many of its side effects are similar. Some of these include:

  • Depression - the most common side effect, reported in roughly 15% of those who take the medication
  • Dizziness/drowsiness
  • Akathisia (aka "restless pacing" - an inability to keep still, with intense anxiety when forced to do so)

Unlike many of the antipychotics, tetrabenazine is not known to cause Tardive dyskinesia, and in fact can be an effective treatment for the antipsychotic-induced movement disorder.

Warnings

  • Because of the relatively high incidence of depression, it has been recommended that people with a history of depression avoid taking tetrabenazine. Research into this is ongoing however, and this warning may be dropped in the future.

Read more at Wikipedia.org


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Prestwick Pharmaceuticals Acquires Rights to Commercialize Nitoman -Tetrabenazine- in Canada
From Business Wire, 9/20/04

WASHINGTON -- Prestwick Pharmaceuticals, Inc., a CNS specialty pharmaceutical company, announced today the acquisition of rights to commercialize tetrabenazine in Canada under the brand name Nitoman(TM) from Cambridge Laboratories, a pharmaceutical company based in the United Kingdom (UK).

Tetrabenazine is a dopamine depletor approved in Canada for the treatment of a series of hyperkinetic movement disorders. Approximately 50,000 Canadians suffer from these disorders, which are characterized by excessive, involuntary purposeless and repetitive movements which may involve the face, limbs or the entire body.

Tetrabenazine is also approved for use in the UK, and a number of European countries, and Australia, and is currently undergoing Phase III pivotal trials in the United States (U.S.). Prestwick plans to file a New Drug Application (NDA) for tetrabenazine in the U.S. later this year.

"Acquiring the rights to Nitoman in Canada represents a significant commercial opportunity for Prestwick on a number of fronts," said David Cory, President and Chief Operating Officer of Prestwick Pharmaceuticals. "This move allows us to build infrastructure to support Canadian healthcare practitioners' and patients' use of Nitoman and begin to generate revenues for Prestwick as we conduct our Phase III program toward approval of tetrabenazine in the United States."

"Licensing commercial rights for Nitoman to Prestwick Pharmaceuticals makes good business sense and ensures that Nitoman will be freely available to patients in Canada who suffer from these disorders," said Mark Evans, Chief Executive Officer of Cambridge Laboratories. "This move allows Cambridge to focus on maximizing the full potential of tetrabenazine on a global basis, while Prestwick Pharmaceuticals manages the development and commercial growth of tetrabenazine in North America."

About Prestwick Pharmaceuticals

Prestwick Pharmaceuticals, Inc. is an emerging specialty pharmaceutical company that focuses on treatments for CNS disorders. The company has multiple product candidates in clinical development for chorea associated with Huntington's disease, Parkinson's disease, and schizophrenia. Prestwick plans to commercialize its lead product, tetrabenazine, in the U.S. as soon as approval is obtained from the U.S. Food and Drug Administration (FDA).

About Cambridge Laboratories

Cambridge Laboratories, based in Newcastle, UK, is a privately owned pharmaceutical company providing specialist products to serve the needs of the secondary healthcare physician. Cambridge's focus is in the areas of CNS, oncology, and niche hospital products. In 1997, Cambridge Laboratories acquired worldwide marketing rights for tetrabenazine.

COPYRIGHT 2004 Business Wire
COPYRIGHT 2004 Gale Group

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