Pfizer and Medivation's Dimebon also flops in Huntington disease

12 April 2011

Global drug behemoth Pfizer (NYSE: PFE) and partner Medivation (Nasdaq: MDVN) said yesterday that results from the Phase III HORIZON trial of the investigational drug Dimebon (latrepirdine) in patients with Huntington disease did not achieve statistical significance for either of the co-primary endpoints of the study.

Dimebon, which is an old Russian antihistamine approved in that market in 1983, had previously been touted as a blockbuster drug with a sales potential of anything between $1.5 billion and $5 billion in the treatment of Alzheimer’s disease. However, despite positive Phase II trial results, last year it failed to meet co-primary and secondary endpoints in AD in two Phase III studies (The Pharma Letter March 4, 2010).

Development to continue in Alzheimer’s, says Medivation

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