Tolerability, Safety and Pharmacokinetic Study Of Methosulide in Healthy Adult Subjects

"Tolerability Study:~Period I:Single oral administration,dose-escalation of Methosulide(six dose groups:25mg-250mg) Period II:Repeated oral administration of Methosulide(group 1:MTD（maximum tolerated dose）/250mg ,group 2:depending on the adverse drug reaction,150mg/250mg)~Pharmacokinetic Study:~Period I:Single oral administration,dose-escalation of Methosulide(three dose groups:50mg,100mg,200mg/250mg) Period II:Repeated oral administration of Methosulide(group 1:MTD（maximum tolerated dose）/250mg~,group 2:depending on the adverse drug reaction,150mg/250mg)~Food Effect on the Pharmacokinetics:~single dose(100mg),two status(Feeding and fasting), washout period(7 days)"

Placebo to match with experimental groups