11/05/2026
A 2023 network meta-analysis reviewed Chinese herbal medicine for primary dysmenorrhea across 54 randomized controlled trials and 5,345 women.
Many of the formulas studied are prepared as warm decoctions (herbal teas) and are traditionally started in the days before the period, when cold or stagnation patterns often appear.
Key findings from the review:
The herbal formulas showed higher overall response rates and greater pain reduction compared with conventional pain medications.
Siwu Decoction and Wenjing Decoction ranked among the top options across outcomes.
No serious adverse events were reported in the included trials.
What are Siwu and Wenjing?
These are classic multi-herb formulas, not single herbs.
Siwu Decoction (Four Substances Decoction) is a foundational blood-nourishing formula. Its main ingredients are Dang Gui (angelica root), Bai Shao (white peony), Chuan Xiong, and prepared rehmannia. It is often used when menstrual issues come with signs of blood deficiency.
Wenjing Decoction (Warm the Channels Decoction) is a warming formula traditionally used for cold stagnation in the uterus. Key ingredients include Wu Zhu Yu (evodia), cinnamon twig, Dang Gui, Chuan Xiong, and white peony, along with several others that warm the channels and move blood. It is commonly matched to cramps that feel better with heat.
In TCM practice these decoctions are matched to individual patterns. The same tea is not used for every person.
This is a summary of published research, not a recommendation to self-treat. Period pain can have many causes. If cramps are severe or keep you from daily life, please speak with a licensed herbalist and your doctor so the right approach can be chosen for you.
Have you tried any warm herbal teas in the week before your period?
The LinSisterHerb Family
Source: Wang et al., Chinese herbal medicine for primary dysmenorrhea: A systematic review and network meta-analysis of 54 randomized controlled trials, European Journal of Integrative Medicine, 2023.