La Roche Posay Laboratoire Dermatologique Effaclar Duo Dual Action Acne Medication Cleanser
Benzoyl peroxide · Liquid · Topical
Active ingredient
Active ingredient Benzoyl peroxide 4.0%
Purpose
Purpose Acne treatment
Uses
Uses for the treatment of acne helps clear up blemishes and allows skin to heal
Warnings
Warnings For external use only
Do not use
Do not use if you have very sensitive skin are sensitive to benzoyl peroxide
When using this product
When using this product skin irritation and dryness is more likely to occur if you use another topical acne medication at the same time. If irritation occurs, only use one topical acne medication at a time avoid unnecessary sun exposure and use a sunscreen avoid contact with the eyes, lips and mouth avoid contact with hair and dyed fabrics, which may be bleached by this product skin irritation may occur, characterized by redness, burning, itching, peeling, or possibly swelling. Irritation may be reduced by using the product less frequently or in a lower concentration.
Stop use and ask a doctor
Stop use and ask a doctor if irritation becomes severe
Keep out of reach of children
Keep out of reach of children. If swallowed, get medical help or contact a Poison Control Center right away.
Directions
Directions
• apply a dime-size amount to damp skin
• gently massage, avoiding the eye area
• rinse well
• use cleanser on entire affected area, every morning and evening
• because excessive drying of the skin may occur, start with one application daily, then gradually increase to two times daily, if needed, or as directed by a doctor
• if bothersome dryness or peeling occurs, reduce application to once a day or every other day
• if going outside, apply sunscreen after using this product
• if irritation or sensitivity develops, stop use of both products and ask a doctor
Inactive ingredients
Inactive ingredients water, glycerin, propylene glycol, cocamidopropyl hydroxysultaine, sodium C14-16 olefin sulfonate, xanthan gum, potassium hydroxide, sodium chloride, sodium citrate, niacinamide, sodium hyaluronate, capryloyl salicylic acid, propanediol, diethylhexyl sodium sulfosuccinate, carbomer, benzoic acid, pentylene glycol, sodium hydroxide, glycolic acid, tetrasodium EDTA, trisodium ethylenediamine disuccinate, citric acid
Questions?
Questions or comments? 1-888-LRP-LABO 1-888-577-5226 Monday - Friday (9 a.m. - 5 p.m. EST)
Label text from the FDA structured product label by L'Oreal USA Products Inc (revised Jul 9, 2025). Long sections are shortened; the complete label is on DailyMed.
Active ingredients
- Benzoyl Peroxide in 1 product
La Roche Posay Laboratoire Dermatologique Effaclar Duo Dual Action Acne Medication Cleanser NDC products (1)
| NDC | Strength & form | Labeler | Type |
|---|---|---|---|
| 49967-647 | Benzoyl Peroxide 40 mg/mL Liquid | L'Oreal USA Products Inc | OTC MONOGRAPH DRUG |
Frequently asked questions
What is La Roche Posay Laboratoire Dermatologique Effaclar Duo Dual Action Acne Medication Cleanser used for?
Uses for the treatment of acne helps clear up blemishes and allows skin to heal
Who makes La Roche Posay Laboratoire Dermatologique Effaclar Duo Dual Action Acne Medication Cleanser?
La Roche Posay Laboratoire Dermatologique Effaclar Duo Dual Action Acne Medication Cleanser is listed by 1 labeler in the FDA NDC directory, including L'Oreal USA Products Inc.