Study of Evaluation of Cavir Tab. 0.5mg With Food Effect on Pharmacokinetics and Safety

Inclusion Criteria: * Healthy male, aged 19 \~ 45 at screening date * Subject's weight is in range from -120 percentage to +120 percentage of ideal body weight which is calculated by { height (cm) - 100} \* 0.9. * The Subject is willing and able to provide written informed consent to participate in the study Exclusion Criteria: * Subject has a history of clinically significant disease. * Subject has a digestive disease (Crohn's disease, ulcer, acute or chronic pancreatitis etc) or abdomen surgery (exclude, simple appendectomy or hernia operation). * Subject has a hypersensitivity history which is clinically significance or additives. * Subject is inappropriate to screening (disease history, physical examination, vital sings, electrocardiogram, laboratory test etc.) * Subject has a laboratory test result as indicated by and one of the following. * serum aspartate aminotransferase\> 1.25 \* normal limit * serum Total bilirubin \> 1.5 \* normal upper limit * serum CPK \> 1.5 \* normal upper limit * eGFR(estimated Glomerular Filtration Rate) calaulated by MDRD (Modification of Diet in Renal Disease) formula \< 60 mL/min/1.73m2 * Subject is hypertension(SBP\>140mmHg or DBP\>90mmHg) or hypotension(SBP\<90mmHg, DBP\<60mmHg) * Subject has a drug abusing history. * Subject is currently abusing alcohol (more than 210 g/week), caffeine(more than 5cups/day) or smoking(more than half pack).