A Randomized, Multinational, Double-blind, Placebo-controlled, Parallel-group Design Pilot Study to Estimate the Tolerability, Safety, Pharmacokinetics, and Pharmacodynamic Effects of Teriflunomide for 24 Weeks When Added to Treatment With Glatiramer Acetate in Subjects With Multiple Sclerosis

The primary objective was to estimate the tolerability and safety of 2 doses of Teriflunomide administered once daily for 24 weeks, compared to placebo, in patients with multiple sclerosis \[MS\] with relapses who were on a stable dose of Glatiramer Acetate \[GA\].The secondary objectives were:* to estimate the effect of the 2 doses of Teriflunomide, compared to placebo, in combination with a stable dose of GA on Magnetic Resonance Imaging \[MRI\] parameters, relapse rate and patient-reported fatigue;* to perform pharmacokinetic analyses of the 2 doses of teriflunomide in combination with a stable dose of GA.