Physically and chemically stable aqueous suspensions of riluzole are disclosed together with the manufacturing methods thereof. Such aqueous suspensions comprise riluzole in particle form and at least a wetting agent, preferably a surfactant. Riluzole is in amounts from about 0.1 % to about 20% w/v and has an average particle size lower than 200 µm； such suspensions are devoided of the known local (mouth) anaesthetic effects of riluzole.
