Megavec 400 mg (Imatinib Mesylate) in Healthy Adult Male Volunteers

* Inclusion Criteria: * Healthy and male subjects aged 20 to 55 years * The subject has a Body weight ≥55 kg and ideal body weight (IBW) within ±20% * A Subject who was judged to be healthy by the investigator to participate in this study based on screening results (according to standard reference index updated recently) * A subject who provided written informed consent to participate in this study and cooperative with regard to compliance with study related constraints. * Exclusion Criteria: * A subject with sign or symptoms or previously diagnosed disease of respiratory, cardiovascular, endocrinology, liver, kidney, hematology, neurology and psychology function or other significant diseases and history * Known allergy or hypersensitivity to the study medication * AST or ALT greater than 1.25 times the upper limit of reference range or Total bilirubin greater than 1.25 times the upper limit of reference range base on screening results * A subject judged ineligible by the investigator to participate in this study for other reason containing clinical laboratory tests