This study is to evaluate whether PED-1 and PED2 are tolerable and effective in the treatment of premature ejaculation. The patients will be randomized and allocated to three treatment groups into placebo, PED-1, and PED-2. The creteria for IELT for enrollment will be > or =2 min in the at least 75% of the sexual intercourse. To diagnosis premature ejaculation, the PEDT will be used. The patients ungone drug free baseline line period will take test drugs for 4 weeks.