A drug used to treat non-small cell lung cancer that has spread to other parts of the body and is anaplastic lymphoma kinase (ALK) positive. It is also being studied in the treatment of other types of cancer. Ceritinib blocks the protein made by the ALK gene. Blocking this protein may stop the growth and spread of cancer cells. Ceritinib is a type of tyrosine kinase inhibitor. Also called Zykadia.