Contact sensitization to benzoyl peroxide.

Area of Science:

• Dermatology
• Allergology
• Contact Dermatitis

Background:

• Benzoyl peroxide (BP) is a common topical acne treatment.
• Contact allergy to BP can manifest as allergic contact dermatitis.
• Understanding BP sensitization prevalence is crucial for safe dermatological practice.

Purpose of the Study:

• To determine the incidence of contact allergy to 5% benzoyl peroxide (BP) gel.
• To assess BP sensitization rates in different patient populations.
• To evaluate allergic reactions in acne patients using BP formulations.

Main Methods:

• Patch testing was performed on 222 patients.
• Included a general clinical population, patients with eczematous dermatoses, and acne vulgaris patients.
• Evaluated reactions to 5% BP gel and commercial BP products.

Main Results:

• 3.1% of the general clinical population showed positive allergic reactions to BP.
• 5.8% of patients with eczematous dermatoses were sensitized to BP.
• 5.1% of acne vulgaris patients using BP gels exhibited allergic reactions.

Conclusions:

• Benzoyl peroxide gel can cause contact allergy.
• Patients with eczematous conditions and acne vulgaris may have a higher risk of BP sensitization.
• Further investigation into BP allergy is warranted for clinical management.