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We start you on the strong ones: findings that have been replicated or come from one large, well-controlled study. Moderate and weak facts are here too, labeled for what they are. Use “Link to this fact” to share a single card.
Hidden ingredients / Other evidence
This review of antiseptics and disinfectants does not discuss benzalkonium chloride in antiseptic bandages or wound dressings; the only dressings it covers are silver-based ones, which rarely cause contact allergy.
Weak evidence.
Caveats
Absence of evidence in this one paper, not evidence of safety or of harm for BAK-containing dressings; bandages and plasters appear only in a list of surgical devices that cause dermatitis.
Source: Lauriola 2025, Italian Journal of Dermatology and Venereology Link to this fact
Information, not medical advice. See also: myths we won’t tell you.