Herbal Medicine 'Eungyosan' and 'Samsoeum' for Common Cold

375 participants with symptoms of the common cold within 48 h will be recruited for this randomized, placebo‐controlled trial. Subjects who will participate in the study will be divided into three groups, 'Eungyosan' group(EGS), 'Samsoeum' group(SSE) and placebo group according to the randomization number. Each group of subjects will take the drugs(EGS or SSE or placebo) 3 times a day up to 8 days. The severity of illness will be assessed by Wisconsin Upper Respiratory Symptom Survey‐21 Korean version (WURSS‐21‐K) and the VAS(visual analog scale) every 8days. Also, the duration of the common cold will be checked to evaluate the effectiveness.