Clematis

Clematis (Clematis spp.) is a genus in the buttercup family (Ranunculaceae) and comprises over 300 species worldwide, which occur mainly in the temperate zones of the Northern Hemisphere. The plant is primarily known as a popular climbing plant in gardens – its medicinal significance, however, is less widely recognized. In traditional herbal medicine, especially in homeopathy and Chinese medicine, Clematis has, however, long been used.

What benefits does Clematis offer?

Clematis is used in natural and folk medicine for various therapeutic purposes. New scientific findings partially support these areas of application through the results of various studies. These studies must be viewed critically, however, as the results are not readily transferable:

  • Anti-inflammatory effects: In traditional Chinese medicine (TCM), certain species such as Clematis chinensis are used to treat rheumatic complaints such as arthritis and joint pain (1,2).
  • Hepatoprotective effect: Studies suggest that the plant's active compounds exhibit potentially liver-protective effects (1)
  • Pain relief: Clematis is frequently used to relieve neuralgic pain and migraines, especially in homeopathic preparations, though this effect is also supported by science (1,2).
  • Antioxidant effects: Results of scientific investigations point to an antioxidant effect of various active compounds in the plant (3)
  • Antibacterial effects: Studies have demonstrated a potentially antibacterial effect (3).

How does Clematis work?

The effects of the Clematis plant can be attributed to the following constituents: triterpene saponins, alkaloids, flavonoids, essential oils, and bitter compounds. The effect, however, depends heavily on the species, the preparation, and the dosage – many Clematis species are toxic at high doses and should therefore only be used with caution.

Side effects and risks

Clematis contains protoanemonin – an irritating and toxic substance that can be harmful to health if used improperly:

  • Skin and mucous membrane irritation: Contact with fresh plant parts can lead to skin rashes or irritation.
  • Toxicity when taken orally: The fresh plant is poisonous. Only properly processed or highly diluted homeopathic preparations are considered safe. Even so, it should only be taken under medical supervision.
  • Pregnancy and breastfeeding: Due to potential risks, Clematis should be avoided during these phases.

Conclusion

Clematis is a fascinating plant with decorative beauty and, at the same time, an underestimated medicinal potential. In traditional applications – especially in homeopathy and TCM – it is valued for pain and inflammation. Due to its toxicity in fresh form, however, it should be used exclusively in tested and correctly dosed products and only under the supervision of medically trained professionals.

Sources:

  1. Chawla, R., Kumar, S., & Sharma, A. (2012). The genus Clematis (Ranunculaceae): chemical and pharmacological perspectives. Journal of ethnopharmacology, 143(1), 116–150. https://doi.org/10.1016/j.jep.2012.06.014
  2. Thapliyal, Somesh & Sati, Hemlata & Sati, Bhawna. (2024). A Comprehensive insight into the phytoconstituents and health benefits of Clematis species. Environment Conservation Journal. 25. 297-302. 10.36953/ECJ.24482653.
  3. Nawaz, I., Nawaz, S., Naqvi, S. T. A., Nasir, A., Shahzadi, I., Ahmed, R., Baig, A., & Shah, M. M. (2025). Antimicrobial, phytochemical, and antioxidant characterization of the leaf extracts of Clematis montana and Clematis grata. Kuwait Journal of Science, 52(1), 100305. https://doi.org/10.1016/j.kjs.2024.100305
  4. Hao, D.-C., Gu, X., Xiao, P.-G., & Peng, Y. (2013). Chemical and biological research of Clematis medicinal resources. Chinese Science Bulletin, 58(1), 112–120. https://doi.org/10.1007/s11434-012-5628-7