Herbal Arnica and Antibacterial and antifungal activity

Arnica is a herbaceous species, genus perennial, belonging to the family Asteraceae, antive to Europe and Asia. It has been used in herbal medicine for centuries to treat strains, sprains, and bruises.

The ingredients
Beside containing contain helenalin as it main ingredient used as anti-inflammatory agent in herbal medicine, it also contains 11,13- dihydrohelenaline, chamissonolid, Sesquiterpene lactone, lignans of the furofuran, dibenzylbutyrolactone, dibenzylbutyrolactol types, pinoresinol, epipinoresinol, phillygenin, matairesinol, nortrachelogenin, and nortracheloside, six dibenzylbutyrolactol derivative, etc.

The benefits
Arnica have been used for thousands of years in folk medicine for several purposes. Vegetal extracts from Arnica--Arnica montana has demonstrated antimicrobial activity preferentially directed against the planktonic fungal and bacterial growth, and to be suggested as a significant source of natural alternatives to antimicrobial therapy, thus avoiding antibiotic therapy. On the other hand, it also  showed slight antimicrobial activity of propolis and Arnica montana against oral pathogens.

C. Side effects
1. Arnica can increase leg pain in a short term
2. Allergy
Arnica used as Cosmetics and herbal remedies with Compositae plant extracts may cause allergic effect in Compositae-allergic patients.
3. Atopic dermatitis
Patient with atopic dermatitis should use Arnica with care as the herb may increase the risk of a risk factor for Compositae allergy.
4. Toxicity
Arnica is toxic as it contains measurable amount of helenalin.
5. Etc.


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 References
1. The effect of topical arnica on muscle pain" by Adkison JD, Bauer DW, Chang T.(PubMed).
2. Cosmetics and herbal remedies with Compositae plant extracts - are they tolerated by Compositae-allergic patients?" by Paulsen E, Chistensen LP, Andersen KE.(PubMed)
(3) Contact allergy to Compositae plants in patients with atopic dermatitis. [Article in English, Serbian]" by Jovanović M, Poljacki M, Duran V, Vujanović L, Sente R, Stojanović S.,(PubMed)
(4) In vitro antimicrobial activity of Romanian medicinal plants hydroalcoholic extracts on planktonic and adhered cells by Stanciuc AM, Gaspar A, Moldovan L, Saviuc C, Popa M, Măruţescu L.(PubMed)
(5) In vitro antimicrobial activity of propolis and Arnica montana against oral pathogens by Koo H, Gomes BP, Rosalen PL, Ambrosano GM, Park YK, Cury JA.(PubMed)