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Genzyme Reports Positive Top-Line Results of TOWER, a Pivotal Phase III Trial for AUBAGIO (teriflunomide)
04-06-2012: Genzyme, a Sanofi company, announced top-line results from the TOWER (Teriflunomide Oral in people With relapsing remitting multiplE scleRosis) trial that assessed the efficacy and safety of once-daily, oral teriflunomide in patients with relapsing forms of multiple sclerosis (MS). In the study, patients receiving teriflunomide 14 mg had a statistically significant reduction in annualized relapse rate and risk of sustained accumulation of disability. Analysis of the full TOWER data is ongoing and results will be presented at a forthcoming scientific meeting.
This double-blind, multi-center trial enrolled 1,169 patients and compared once-daily treatment with either 7 mg or 14 mg oral teriflunomide against placebo. Results from the primary and secondary endpoints for the proposed 14 mg commercial dose include the following:
A 36.3 percent reduction in annualized relapse rate, the primary endpoint of the trial, was observed in patients who received teriflunomide compared to placebo (p<0.0001)
A 31.5 percent reduction in the risk of 12-week sustained accumulation of disability, the main secondary endpoint, as measured by the Expanded Disability Status Scale (EDSS) was observed with teriflunomide compared to placebo (p=0.0442)
“These encouraging results are consistent with the results on relapse rate and disability that were observed in the TEMSO study and highlight the promise of teriflunomide as a potential new treatment for many patients with relapsing MS,” said Genzyme President and CEO, David Meeker, M.D.
A 22.3 percent reduction in annualized relapse rate was observed in patients treated with teriflunomide 7 mg compared to placebo (p=0.02); there was no statistically significant difference observed between teriflunomide 7 mg and placebo for the risk of 12-week sustained accumulation of disability.
Patients who completed the trial were followed for a period between 48 and 173 weeks. The average duration of teriflunomide exposure in TOWER was 18 months. Adverse events observed in the trial were consistent with previous clinical trials with teriflunomide in MS. The most common types of adverse events reported more frequently in the teriflunomide arms were headache, ALT (Alanine transaminase) elevations, hair thinning, diarrhea, nausea and neutropenia. There was one death from a respiratory infection in the placebo arm and three deaths in the teriflunomide arms from a motor vehicle accident, suicide and sepsis.
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