Safety and the Pharmacokinetic Study of Characteristics of MKT-N2 (Montelukast) and Singulair® (Montelukast Sodium)to Treat Asthma

Inclusion Criteria: * Healthy Korean Male over20, under 45 years old * 55kg over weight, IBW +-20% range male Exclusion Criteria: * Males who have gotten a clinically significant of liver, pancreas, kidneys, nervous system, respiratory system, endocrine system, blood cancer, mental illness, cardiovascular, urinary tract disease, or a history corresponding * Males who have gotten a history of gastrointestinal disease * Males who have gotten a history of hypersensitivity to montelukast or reaction to other drugs(aspirin, antibiotics)