Ceritinib (Zykadia, LDK378) dihydrochloride is a selective, orally bioavailable and ATP-competitive inhibitor of ALK with IC50 of 0.2 nM. Ceritinib dihydrochloride also inhibits InsR, IGF-1R and STK22D with IC50 of 7 nM, 8 nM and 23 nM, respectively. Ceritinib exhibits antitomor activity.