The following laboratory values must be greater than the lower limits of normal prior to starting study drug (supplementation allowed): potassium, magnesium, calcium Patient must have the following laboratory values or have the following laboratory values corrected with supplements to be above the lower limit of normal before the first dose of ceritinib:\r\n* Potassium\r\n* Magnesium\r\n* Phosphorus\r\n* Total calcium (corrected for serum albumin) Unacceptable electrolyte values, including:\r\n* Potassium < 4.0 mmol/L despite supplementation, or elevated potassium above the CTCAE grade 1 upper limit\r\n* Magnesium below the lower limit of normal range despite supplementation, or elevated magnesium above the CTCAE grade 1 upper limit\r\n* Ionized calcium or corrected calcium values below the normal range or hypercalcemia above the CTCAE grade 1 upper limit Serum phosphorus, calcium, magnesium and potassium >= lower limit of normal Calcium >= lower limit of normal Potassium, magnesium, phosphorus and total calcium values ? LLN (lower limit of normal) Calcium >= lower limit of normal (=< 48 hours prior to enrollment/randomization) Calcium >= lower limit of normal (=< 48 hours prior to registration) Normal serum potassium (K+), magnesium (Mg+), phosphates (PO4), and total Ca++ (calcium) (pre-treatment abnormal values may be therapeutically corrected before starting therapy and must be documented as normal or if abnormal values persist must be documented as clinically insignificant) Magnesium, potassium and calcium < the lower limit of normal per institution normal lab values Magnesium > the lower limit of normal per institution normal lab values Potassium > the lower limit of normal per institution normal lab values Calcium > the lower limit of normal per institution normal lab values Magnesium or potassium lower than the normal institutional values Magnesium, potassium and calcium > the lower limit of normal per institution normal lab values Magnesium >= the lower limit of normal per institution normal lab values Potassium >= the lower limit of normal per institution normal lab values Calcium >= the lower limit of normal per institution normal lab values Magnesium, potassium and calcium > the lower limit of normal per institution normal lab values