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Dimebon Improves All 5 Alzheimer's Measures

Posted Jan 27 2009 8:13pm
183 Russian Alzheimer's patients were studied for a year to compare the safety and efficacy of Dimebon, an obscure antihistamine that is not on the market anywhere in the world. The study was conducted by Baylor College of Medicine researchers, and published in the Lancet.
In the study, the authors noted that Dimebon is the first drug for Alzheimer's disease that demonstrated continued improvement in patients over a 12 month period. Other approved drugs do not have this effect.

Half of the 183 patients in the Russian study received Dimebon; the other half were given a placebo or an inactive pill. Clinicians at the study sites then monitored the patients' progress over the next year on five different outcomes. All of those in the study had mild to moderate Alzheimer's disease.

"What we saw in the clinical trial is that people on the medication continued to improve over time," Doody said. "Those on placebo continued to decline."

Researchers believe the medication works by stabilizing mitochondria, the cellular components that produce energy, and possibly by inhibiting brain cell death. Researchers evaluated patients' thinking and memory ability, overall function, psychiatric and behavioral symptoms, and ability to perform daily activities.

"Usually at this point in a drug's development, we are happy to see improvement in one of the outcome measures," Doody said. "We saw improvement in all five." _ SD
The study was reportedly well-designed and conducted. The significant and ongoing improvement of the drug group over the placebo group for at least a year, is quite impressive. Rights for the drug are owned by Medivation, Inc. (Nasdaq: MDVN), which has enjoyed a recent boost in stock price.

More information on this study and other new research on Alzheimer's Disease at WaPo:.
The study was done in Russia because dimebon had been approved there as an antihistamine. Dimebon is made by the San Francisco-based biopharmaceutical company Medivation. Doody is on the Scientific and Clinical Advisory Board of Medivation and has stock options in the company.

Another phase III trial has just started, Doody said. This six-month trial is being conducted in the United States, Europe and South America and is now in the process of recruiting several hundred patients, she noted.

"We are anxiously awaiting the completion of the next study, so that we can see if this drug could potentially be approved for treating Alzheimer's patients," Doody said.

Gandy said the drug does appear to be superior to the currently approved medicines for Alzheimer's.

"This is the first new promising symptomatic therapy in a long time," Gandy said. "This drug could potentially add to the effects of other drugs such as Aricept, Namenda and Exelon," he said. "I think it's a pretty exciting development."


Partially excerpted from a previous posting at Al Fin
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