- Subjects having received at least one of the following topical treatments on the treated area: Corticosteroids, antibiotics, benzoyl peroxide, azelaic acid, dapsone, hydroxyacids, Zinc containing treatments, antiseptics, other anti-inflammatory products or other acne treatments (2 weeks); Retinoids (4 weeks); Cosmetic/aesthetic procedures on the face (1 week); Wax epilation (2 weeks); Photodynamic therapy (6 weeks); Laser therapy, microdermabrasion, deep chemical peel, plastic surgery for acne (3 months).