Antiseptic Effect of a Topical Dermatological Formulation That Contains Hamamelis Distillate and Urea

Vol. 9, No. 3, 2002

Free Abstract Article (PDF 107 KB)

Original Article · Originalarbeit

Antiseptic Effect of a Topical Dermatological Formulation That Contains Hamamelis Distillate and Urea
M. Gloor^a, J. Reichling^b, B. Wasik^a, H.E. Holzgang^{c, d}

^aHautklinik, Städtisches Klinikum Karlsruhe;
^bInstitut für Pharmazeutische Biologie, Universität Heidelberg;
^cOmnimedica AG, Zürich;
^dBLC Company Ltd, Zollikon

Address of Corresponding Author

Forschende Komplementärmedizin und Klassische Naturheilkunde / Research in Complementary and Classical Natural Medicine 2002;9:153-159 (DOI: 10.1159/000064265)

Summary

Objective: To determine the antimicrobial activity of a distillate of Hamamelis (Aqua Hamamelidis ), United States Pharmacopoeia (USP) 23, and urea formulated as a topical dermatological preparation that contains both active ingredients. Methods: Using the simple occlusion test and expanded flora test, we conducted in vivo studies in 15 healthy volunteers. We also performed in vitro studies using the agar diffusion test. Results: The occlusion test and expanded flora test demonstrated significant antimicrobial activity for a product containing the Hamamelis distillate (90%) and urea (5%) among other ingredients. The expanded flora test demonstrated significant antimicrobial activity for both Hamamelis distillate and urea. The simple occlusion test showed the same tendency, but results were not significant. The agar diffusion test showed inhibition of Staphylococcus aureus and Candida albicans , among other organisms. Comparison with earlier studies of chlorhexidine digluconate and fuchsine using the same method showed that the antimicrobial activities of Hamamelis distillate and urea were relatively weak. This finding is supported by the weak inhibitory activity observed in the agar diffusion test (using 100% of the finished dosage form). Conclusion: Formulations of Hamamelis distillate and urea are mainly used for their antiinflammatory, hydrating, and barrier-stabilizing effects in dermatitis maintenance therapy. As bacterial colonization has a central role in the pathogenesis of atopic dermatitis and intertrigo, the antimicrobial activity of such products is considered a welcome, added benefit.

For non-native English speakers and international authors who would like assistance with their writing before submission, we suggest American Journal Experts for their research paper editing service.