Pediatr. praxi. 2025;26(4):230-233 | DOI: 10.36290/ped.2025.045

Excipients of pharmaceutical and cosmetic products as possible causes of contact eczema

doc. MUDr. Eliška Dastychová, CSc., MUDr. Miroslav Nečas, Ph.D., MUDr. Gabriela Behrami
I. dermatovenerologická klinika FN u sv. Anny v Brně

Contact sensitization to excipients of pharmaceutical and cosmetic products is most often encountered in chronic eczema sufferers. In the pediatric population, especially in patients with atopic eczema. Sensitization can be caused by preservatives, emulsifiers and antioxidants. Preservatives include: parabens, formaldehyde-releasing preservatives (2-bromo-2-nitropropane-1,3-diol, imidazolidinyl urea, diazolidinyl urea, DMDM-hydantoin, Quaternium 15) Kathon CG (chemically a mixture of 5-chloro-2-methyl-4-isothiazolinone and 2 methyl-4-isothiazolinone in a ratio of 3:1), benzalkonium chloride, phenoxyethanol, chloroacetamide, p-chloro-m-cresol, sorbic acid, triclosan, glutaraldehyde, iodopropynyl butylcarbamate, benzyl alcohol, and benzyl salicylate. Emulsifying agents include wool wax alcohols, cocamidopropyl betaine, propylene glycol and trolamine. Among antioxidants, gallates, butylhydroxyanisole and butylhydroxytoluene can cause sensitization. The frequency of sensitization to these excipients in a group of 6,616 chronic eczema sufferers is given.

Keywords: excipients of pharmaceutical and cosmetic products, preservatives, emulsifiers, antioxidants, contact sensitization.

Accepted: August 20, 2025; Published: September 26, 2025  Show citation

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Dastychová E, Nečas M, Behrami G. Excipients of pharmaceutical and cosmetic products as possible causes of contact eczema. Pediatr. praxi. 2025;26(4):230-233. doi: 10.36290/ped.2025.045.
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