Treatment of cataplexy

A method of treating cataplexy in a subject in need thereof, comprising administering to the subject a therapeutically effective amount of a compound of Formula (I):

• or a pharmaceutically acceptable salt or ester thereof;
• wherein R is a member selected from the group consisting of hydrogen, lower alkyl of 1 to 8 carbon atoms, halogen selected from F, Cl, Br and 1, alkoxy containing 1 to 3 carbon atoms, nitro, hydroxy, trifluoromethyl, and thioalkoxy containing 1 to 3 carbon atoms;
• x is an integer of 0 to 3, with the proviso that R may be the same or different when x is 2 or 3;
• R1 and R2 are independently selected from the group consisting of hydrogen, lower alkyl of 1 to 8 carbon atoms, phenyl, and cycloalkyl of 3 to 7 carbon atoms;
• or
• R1 and R2 can be joined to form a 5 to 7-membered unsubstituted heterocycle, wherein the heterocycle can comprise 1 to 2 nitrogen atoms and 0 to 1 oxygen atom, wherein the nitrogen atoms are not directly connected with each other or with the oxygen atom.