The Efficacy of Thai Herbal Prasaplai Formula for Treatment of Primary Dysmenorrhea: A Short-Term Randomized Controlled Trial

Figure 1

(a) Flow chart of the study. (b) Protocol of treatment and assessments. All interventions were started immediately after the first day of menstruation. Pretreatment is defined as the time of the start of menstruation before drugs are taken. Days 1, 2, and 3 are the days of menstruation after drugs are taken.

(a)

(b)