The present invention relates to pharmaceutical compositions comprising the NK1 receptor antagonist [2-Methoxy-5-(5-trifluoromethyl-tetrazol-1-yl)-benzyl]-(2S-phenyl-piperidin-3S-yl)-amine, or a pharmaceutically acceptable salt or solvate thereof, and a sodium channel blocker, as a combined preparation for simultaneous or sequential administration and to the use of such compositions in the treatment of certain disorders, including epilepsy, mood disorders and pain.