Names

  • English: Siam Weed; Christmas Bush
  • Hausa: Shuwaka; Hantsi
  • Igbo: Abalidiegbo, Obiokwara; Awolowo
  • Yoruba: Ewe Akintola; Awolowo

Health Benefits

  • Wound Healing and Haemostatic Effects: Leaf extracts accelerate wound closure by promoting blood clotting, fibroblast proliferation, and collagen formation, making it effective for cuts, sores, and ulcers.
  • Antimicrobial Activity: The plant’s ethanolic and aqueous extracts exhibit activity against pathogens like Staphylococcus aureus, Escherichia coli, and Candida albicans, supporting its use in treating infections such as skin diseases and diarrhea.
  • Anti-inflammatory Effects: Flavonoids and phenolic compounds in the leaves reduce inflammation, aiding in the management of conditions like arthritis and swelling from injuries.
  • Analgesic Properties: Leaf decoctions relieve pain, traditionally used for headaches, toothaches, and general body pain.
  • Antioxidant Benefits: Rich in antioxidants, the plant protects against oxidative stress, potentially reducing the risk of chronic diseases like cancer and cardiovascular disorders.
  • Antidiabetic Potential: Studies indicate that leaf extracts lower blood glucose levels in diabetic models, supporting its use in managing diabetes.
  • Antimalaria properties: The leaf extracts demonstrate antimalarial properties and is used in folk medicine to reduce fever 
  • Antidiarrheal Properties: Decoctions from the leaves have been used traditionally to manage diarrhea and dysentery.
  • Digestive Aid: It is used to treat stomach ulcers and gastrointestinal disorders 


Other Benefits

  • Soil Fertility Improvement: As a cover crop, it enhances soil fertility by adding organic matter and nitrogen, benefiting agricultural systems.
  • Pest Repellent: The plant’s strong odor repels insects, making it useful in traditional farming to protect crops from pests.
  • Erosion Control: Its extensive root system stabilizes soil, preventing erosion in degraded lands and supporting reforestation efforts.
  • Economic Potential: The plant is harvested for herbal medicine markets, providing income for rural communities, particularly women.
  • Cultural Uses: In some Nigerian communities, it is used in rituals or as a protective charm against spiritual ailments.
  • Animal Forage: Although limited by its potential toxicity in large amounts, it is sometimes used as fodder for livestock in controlled conditions.
  • Beekeeping: Flowers provide nectar for honey production 

How It Is Used

  • Medicinal Preparations:
    • Fresh leaves are crushed and applied directly to wounds or sores to promote healing, stop bleeding and prevent infection.
    • Leaf decoctions are taken orally to treat stomach aches, diarrhea, and malaria (Dosage carefully controlled).
    • Leaf pastes or poultices are used for skin infections, burns, and insect bites, leveraging their antimicrobial and anti-inflammatory properties.
    • Boiled leaves are consumed as teas for fever, colds, and diabetes management, often combined with other herbs.
    • In ethnobotanical remedies, the leaves are used for postpartum care, to reduce swelling, and as an antipyretic for fever reduction.
    • The vapor from boiled leaves is sometimes inhaled to relieve nasal congestion or respiratory irritation.
    • Alcohol-based extracts are used for longer preservation 
  • Agricultural Uses: The plant is spread as a mulch to improve soil fertility or used as a natural pesticide in organic farming.

Side Effects/Caution

  • Toxicity Concerns: The plant contains pyrrolizidine alkaloids, which are potentially hepatotoxic and carcinogenic in high doses or with prolonged use, particularly when taken internally. Internal use should be limited to short periods.
  • Allergic Reactions: Topical application may cause skin irritation or allergic reactions in sensitive individuals.
  • Invasive Nature: Chromolaena odorata is a highly invasive weed, and it contains allelopathic chemicals that inhibit other plants thereby outcompeting native plants and disrupting ecosystems, which poses environmental challenges.
  • Limited Human Studies: While animal studies support its benefits, comprehensive human safety data is lacking, necessitating cautious use.
  • Drug Interactions: Potential interactions with medications, especially antidiabetic or antihypertensive drugs, are not well-studied, so medical consultation is advised.
  • Pregnancy and Breastfeeding: Due to potential toxicity, pregnant and breastfeeding women should avoid internal use until further safety data is available.
  • Overuse Risks: Excessive use of leaf extracts may lead to liver damage or other adverse effects, emphasizing the need for moderation.


References

  • Afolayan, A. J., et al. “In Vitro Antibacterial, Antioxidant and Anti-Inflammatory Activities of Chromolaena odorata.” South African Journal of Botany, vol. 93, 2014, pp. 10–16, doi:10.1016/j.sajb.2014.03.009.
  • Ajiboye, T. O., et al. “Antioxidant and Anti-Inflammatory Activities of Chromolaena odorata Leaf Extract.” Journal of Medicinal Plants Research, vol. 7, no. 16, 2013, pp. 1009–1018, doi:10.5897/JMPR12.1232.
  • Akinmoladun, A.C., et al. “Chemical Constituents and Antioxidant Activity of Chromolaena odorata.” African Journal of Biotechnology, vol. 9, no. 54, 2010, pp. 8437-8442. 
  • Akinmoladun, F. O., et al. “Wound Healing and Antibacterial Activities of Methanolic Extracts of Chromolaena odorata Leaves.” Journal of Medicinal Plants Research, vol. 4, no. 18, 2010, pp. 1820–1824.
  • Chakraborty, A. K., et al. “Chromolaena odorata (L.) R.M. King & H. Rob.: An Overview.” Journal of Pharmacy Research, vol. 4, no. 10, 2011, pp. 573–576.
  • Igboechi, A. C., and D. C. Eke. “Ethnobotanical Study of Chromolaena odorata in South-East Nigeria.” Nigerian Journal of Natural Products and Medicine, vol. 15, 2011, pp. 31–36.
  • Iwu, Maurice M. Handbook of African Medicinal Plants. 2nd ed., CRC Press, 2014, pp. 142–144.
  • National Research Council. Lost Crops of Africa: Volume II. National Academies Press, 2008, pp. 301-303. 
  • Odugbemi, Tolu. Outlines and Pictures of Medicinal Plants from Nigeria. University of Lagos Press, 2008, pp. 167-169. 
  • Onkaramurthy, M., et al. “Evaluation of Wound Healing Activity of Chromolaena odorata Extracts on Rats.” BMC Complementary and Alternative Medicine, vol. 13, 2013, p. 25, doi:10.1186/1472-6882-13-25.
  • Oyinlade, O. A., et al. “Antidiabetic and Antioxidant Effects of Chromolaena odorata Leaf Extract in Streptozotocin-Induced Diabetic Rats.” Journal of Ethnopharmacology, vol. 176, 2015, pp. 305–311, doi:10.1016/j.jep.2015.10.026.
  • Phan, T.T., et al. “Wound Healing Potential of Chromolaena odorata.” Journal of Alternative and Complementary Medicine, vol. 7, no. 3, 2001, pp. 281-289. 
  • Sofowora, A. Medicinal Plants and Traditional Medicine in Africa. Spectrum Books, 2008.
  • Vijayaraghavan, K., et al. “Chromolaena odorata: A Neglected Weed with Potential Pharmacological Activities.” Pharmacognosy Reviews, vol. 11, no. 22, 2017, pp. 112–119, doi:10.4103/phrev.phrev_23_17.
  •