The purpose of this study is to evaluate the drug-drug interaction between Erdosteine and Bepotastine besilate in healthy adult volunteers.

Inclusion Criteria:

• Healthy male subjects aged 20 - 45 years
• A body mass index in the range 18.5 - 25 kg/m2
• Willingness to participate during the entire study period
• Written informed consent after being fully informed about the study procedures

Exclusion Criteria:

• Any past medical history of hepatic, renal, gastrointestinal, respiratory, endocrine, psychiatric, neurologic, haemato-oncologic or cardiovascular disease
• History of clinically significant drug hypersensitivity
• Use of medication within 7 days before the first dose
• Heavy drinker/smoker
• Whole blood donation during 60 days before the study
• Judged not eligible for study participation by investigator