65
Participants
Start Date
November 13, 2014
Primary Completion Date
November 30, 2015
Study Completion Date
November 30, 2015
cetylpyridinium chloride
Four study groups take cetylpyridinium chloride of 1.5mg, 3mg, 4.5mg and 6mg daily for two weeks.
Placebo
Control group takes the placebo for the same period.
Seoul National University Hospital
OTHER