The subject invention provides a method for treating a subject afflicted with a form of multiple sclerosis (MS) or presenting a clinically isolated syndrome (CIS) comprising periodically administering to the subject an amount of laquinimod and an amount of a compound of formula (I): as described herein. The subject invention also provides packages and pharmaceutical compositions comprising laquinimod and a compound of formula (I) as described herein. The subject invention further provides uses of said compounds, pharmaceutical compositions and packages in treating a subject afflicted with a form of MS or presenting a CIS.