The use of a compound of the formula I or a pharmaceutically acceptable salt or solvate thereof, for the manufacture of a medicament for use in the treatment of a condition ameliorated by the inhibition of raf kinase, wherein: -X=Y- is selected from -CR 2 =CR 3 - and -CR 2 =N-; R 1 is selected from H, halo, NRR', NHC (=O)R, NHC (=O)NRR', NH 2 SO 2 R, and C (=O)NRR', where R and R' are independently selected from H and C 1-4 alkyl, and are optionally substituted by OH, NH 2 , SO 2 -NH 2 , C 5-20 carboaryl, C 5-20 heteroaryl and C 3-20 heterocyclyl, or may together form, with the nitrogen atom to which they are attached, an optionally substituted nitrogen containing C 5-7 heterocyclyl group; R 2 and R 3 (where present) are independently selected from H, optionally substituted C 1-7 alkyl, optionally substituted C 5-20 aryl, optionally substituted C 3-20 heterocyclyl, halo, amino, amido, hydroxy, ether, thio, thioether, acylamido, ureido and sulfonamino; R 4 an optionally substituted C 5-20 carboaryl or C 5-20 heteroaryl group; and R 5 is selected from R 5 ', halo, NHR 5' , C(=O)NHR 5' , OR 5 ', SR 5' , NHC (=O)R 5' , NHC (=O)NHR 5' , NHS (=O) 2 R 5' , wherein R 5' is H or C 1-3 alkyl (optionally substituted by halo, NH 2 , OH, SH).