Clinical Study to Evaluate the Efficacy, Safety, and Tolerability of ACT-128800 in Patients With Relapsing-remitting Multiple Sclerosis
Clinical Study to Evaluate the Efficacy, Safety, and Tolerability of ACT-128800 in Patients With Relapsing-remitting Multiple Sclerosis
This study will assess the efficacy, safety, and tolerability of ACT-128800 in patients with
 relapsing-remitting multiple sclerosis.
Inclusion Criteria:

 -  Adult males and females

 -  Diagnosis of RRMS as defined by the revised (2005) McDonald Diagnostic Criteria for
 Multiple Sclerosis (MS).

 -  Signed inform consent prior to initiation of any study-mandated procedure.

 Exclusion Criteria:

 -  A diagnosis of MS categorized as primary progressive or secondary progressive or
 progressive relapsing.

 -  Patients currently treated for an autoimmune disorder other than MS.

 -  Contraindications for MRI.

 -  Ongoing bacterial, viral, or fungal infection.

 -  History or presence of malignancy.

 Additional inclusion and exclusion criteria apply with respect to medical conditions and
 concomitant treatments which could affect patients' risk from participating in the study.