Clinical trial to evaluate the pharmacokinetic interactions and safety between telmisartan and chlorthalidone.

Inclusion Criteria:

1. Healthy male subjects
2. Age(yr)between 20 and 50
3. Signed written informed consent

Exclusion Criteria:

1. Known hypersensitivity to investigator product, thiazide, sulphonamide and other drugs or additive.
2. History of any siginificant Sickness, Cardiovascular, Respiratory, Renal, Endocrine, Neurological, Psychic, Cancer, Gasstrointestinal, Hematologic.
3. History of drug and/or alcohol abuse
4. Over 10 tobaccos a day
5. Other condition which in the opinion of the investigator preclude enrollment into the study