Wüthrich H, Yatim A, Di Lucca J, Walker A, Ventejou S, Morren MA, Goossens A, Dendooven E, Aerts O, Gilliet M, Seremet T. It is not always chlorhexidine: Identification of benzoxonium chloride and lauramine oxide as culprit allergens in a popular antiseptic in Switzerland.
Contact Dermatitis 2023;
89:284-289. [PMID:
37286188 DOI:
10.1111/cod.14359]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 06/09/2023]
Abstract
BACKGROUND
A popular antiseptic spray in Switzerland (Merfen spray), containing chlorhexidine digluconate, benzoxonium chloride and lauramine oxide, is frequently used to treat skin wounds. However, it is also increasingly reported as a major cause of adverse skin reactions, including allergic contact dermatitis (ACD).
OBJECTIVES
To investigate the contact allergens responsible for ACD from this antiseptic.
PATIENTS/METHODS
Patch tests were performed on seven patients with a clinical history compatible with contact dermatitis from this antiseptic mixture.
RESULTS
All patients presented with acute eczematous reactions following contact with either Merfen spray alone, or with multiple products including this spray. Patients showed positive reactions to this product in both patch tests and repeated open application tests (ROATs). Four patients showed dose-dependent reactions to both benzoxonium chloride and lauramine oxide. One patient showed a dose-dependent reaction to the former and a non-dose-dependent reaction to the latter. Finally, two subjects showed responses only to lauramine oxide. One patient reacted to chlorhexidine digluconate 0.5% aq. in addition to both other allergens.
CONCLUSIONS
Two commercially unavailable allergens, that is, benzoxonium chloride and/or lauramine oxide were identified as major causes of ACD from Merfen antiseptic spray, whereas chlorhexidine digluconate was a contributing culprit in only one patient.
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