Dysmenorrhea is a pathological condition principally marked by strong pain, such as lower abdominal pain and low back pain, that occurs in association with menses.1,2 A Japanese survey has reported that 50% of women who had menses experienced pain, and 17% experienced interference with work, study and daily life during the past 3 months,3 and thus, the disease significantly impacts women’s quality of life (QOL) and work.

Dysmenorrhea is a pathological condition principally marked by strong pain, such as lower abdominal pain and low back pain, that occurs in association with menses.1,2 A Japanese survey has reported that 50% of women who had menses experienced pain, and 17% experienced interference with work, study and daily life during the past 3 months,3 and thus, the disease significantly impacts women’s quality of life (QOL) and work.