Benzoyl peroxide is a topical antimicrobial and keratolytic agent widely used to treat acne by reducing Cutibacterium acnes bacteria and promoting follicular exfoliation. It is available over-the-counter and by prescription in concentrations typically ranging from 2.5% to 10%.
| Reported effect | How often | Notes |
|---|---|---|
| Skin dryness and peeling | Common | Often dose-dependent; more pronounced at higher concentrations. |
| Erythema (redness) | Common | Frequently occurs early in treatment and may subside with continued use. |
| Burning or stinging sensation | Common | Usually transient upon application. |
| Skin irritation and itching | Common | May improve as skin acclimates. |
| Bleaching of hair, clothing, and fabrics | Common | Due to oxidizing properties; not a biological effect but commonly reported. |
| Contact dermatitis | Uncommon | Irritant contact dermatitis more frequent than allergic. |
| Allergic contact sensitization | Rare | True allergic contact dermatitis confirmed by patch testing is infrequent. |
| Severe hypersensitivity reaction (swelling, throat tightness, faintness) | Very rare | Rare reports prompted regulatory warnings; seek medical attention if occurs. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.