An Extension Study of LAQ/5062 Exploring the Long Term Safety, Tolerability and Clinical Effect Parameters During the Disease

This is a multinational, multicenter, randomized, double-blind, parallel-group active extension of LAQ/5062 study (NCT00349193), assessing the tolerability, safety and efficacy of two doses (0.3 mg and 0.6 mg) of laquinimod, orally administered in participants with relapsing remitting multiple sclerosis (RRMS), followed by an open-label phase of laquinimod 0.6 mg daily. This study is LAQ/5063 (i.e., double-blind extension) and LAQ/5063 OL (i.e., subsequent open-label extension). - The first period of the extension study is an active, double-blind period. Participants from the active treatment arms in LAQ/5062 continue their assigned treatment in blinded fashion. Participants who were assigned to placebo treatment in LAQ/5062 are equally randomized in blinded-fashion to laquinimod 0.6 mg or laquinimod 0.3 mg. - Once termination visit of LAQ/5063 active double-blind phase (completion of the full 36 weeks or as requested by the Sponsor) is performed, all participants continue on laquinimod 0.6 mg daily as an open-label intervention. The open-label period continues as long as the Sponsor continues the development of laquinimod 0.6 mg for RRMS or early discontinuation.