From a recent study, it was assessed that fennel is effective and safe for decreasing the primary dysmenorrheal pain.

In this study, twenty databases were investigated. And the randomized controlled trials finding the efficiency of fennel for the treatment of primary dysmenorrhea were included.

Twelve studies were considered in this evaluation. The collective outcomes of the seven trials demonstrated the similar effect of fennel to the conventional drug treatments in easing the pain.

As compared to placebo, fennel has shown beneficial effects on decreasing the primary dysmenorrheal pain. Among all, only three studies evaluated the adverse events.

Fig- Funnel plot for fennel for managing pain; SE: standard err; SMD: standard mean difference

It was concluded that the fennel is the same as effective as conventional drug treatments in reducing the primary dysmenorrheal pain.