Winwa Yellow Lotion 0.4%

Winwa Yellow Lotion 0.4% is a topical antiseptic solution manufactured by Winwa Medical Sdn Bhd. Its active ingredient is Acriflavine Hydrochloride 0.4% w/v, an acridine-dye antiseptic compound that gives the solution its characteristic clear, orange-yellow colour — the same colour that has made this category of product widely known in Malaysian households simply as “yellow lotion” or “losyen kuning”. Sodium Benzoate is included as a preservative to keep the aqueous solution stable once the bottle has been opened.

This product belongs to the long-established “yellow lotion” category of topical antiseptics sold across Malaysia and the wider region, a category distinct from calamine-based anti-itch lotions (which are typically pink or white and formulated around an antihistamine or zinc oxide base) and from antifungal creams. Winwa Yellow Lotion 0.4% is sold through DoctorOnCall in 30ml and 60ml bottle sizes, packaged with a screw-cap closure for repeated use from the same bottle over the course of treating a minor skin injury.

As an OTC (Over-the-Counter) product, Winwa Yellow Lotion 0.4% can be purchased through DoctorOnCall without needing a doctor’s prescription, and it is a long-standing staple of Malaysian first-aid kits and home medicine cabinets. It is formulated strictly for external application to the skin and is not intended to be swallowed or placed in the eyes.

• Wash your hands before and after applying the lotion, and clean the affected area gently with clean water or saline before application.
• Soak a clean cotton ball, cotton swab, or piece of sterile gauze with Winwa Yellow Lotion 0.4%.
• Dab the soaked cotton or gauze gently onto the affected area, covering the cut, scrape, or skin surface evenly; avoid vigorous rubbing.
• Allow the solution to air-dry on the skin before covering the area with a plaster or bandage, if a dressing is needed.
• Reapply 2 to 3 times a day, or as advised by a pharmacist, using a fresh piece of cotton or gauze for each application to avoid recontaminating the bottle.
• Close the cap tightly immediately after each use to keep the solution from evaporating or becoming contaminated.

Winwa Yellow Lotion 0.4% is for external application only and does not have an oral “dose” in the way a tablet or syrup does. A thin film of the solution applied over the affected skin area 2 to 3 times daily is generally sufficient; using more than this, or applying it more frequently, does not clean a wound any faster and may increase the chance of skin irritation. For young children, apply a smaller amount under adult supervision, and for any wound, rash, or skin condition that does not show improvement within a few days of regular use, stop self-treatment and consult a doctor or pharmacist rather than continuing to reapply.

Use Winwa Yellow Lotion 0.4% before the expiry date printed on the bottle and outer carton. Always check this printed date, along with the batch number, before each use, and do not use the product past its stated expiry even if the solution still looks and smells normal. Once opened, try to use the bottle within the period recommended on the packaging, as repeated opening and exposure to air can gradually affect the stability of the solution.

Store Winwa Yellow Lotion 0.4% at room temperature, below 30°C, in a cool, dry place away from direct sunlight and away from naked flame or other heat sources. Keep the bottle tightly capped between uses to prevent evaporation and contamination, and keep it out of the reach and sight of young children, since the brightly coloured liquid can be mistaken for a drink. Do not use the solution if it has become unusually cloudy, has developed an off odour, or if the bottle appears damaged or has been left open for a prolonged period.

• Common: A mild, brief stinging or burning sensation at the moment of application, particularly on broken or raw skin.
• Common: Temporary yellow-orange staining of the skin at the application site, and possible staining of clothing, bedding, or bandages that come into contact with the solution.
• Serious: An allergic skin reaction such as a spreading rash, persistent redness, swelling, or blistering beyond the treated area, which needs prompt medical or pharmacist review.
• Serious: Signs of a more general allergic reaction, such as difficulty breathing, facial or throat swelling, or dizziness, which require immediate emergency medical attention.

• Do not use in or near the eyes, inside the mouth or nose, or on mucous membranes.
• Do not swallow; this product is for external skin use only.
• Do not use on individuals with a known hypersensitivity or allergy to Acriflavine, other acridine dyes, or Sodium Benzoate.
• Do not apply to deep puncture wounds, animal or human bites, severe burns, or heavily infected wounds without first seeking medical assessment.
• Do not use on large areas of broken skin in infants or young children without first consulting a doctor or pharmacist.

• No clinically significant drug or food interactions have been established for Winwa Yellow Lotion 0.4% when used topically as directed, as the solution is applied to the skin surface and is not intended to be swallowed or absorbed systemically in meaningful amounts.

• Keep a bottle in your home or travel first-aid kit — it is a long-standing staple for cleaning minor cuts, scrapes, and grazes.
• Use a fresh cotton swab or gauze pad for every application rather than dipping a previously used swab back into the bottle.
• Expect temporary yellow-orange staining on skin, clothing, and dressings — this is a normal characteristic of the acriflavine dye and is not a sign of a problem.
• Let the solution air-dry fully before applying a plaster or bandage over the area.
• Always re-tighten the cap immediately after use to keep the solution from drying out or becoming contaminated.
• Replace the bottle once it is past its printed expiry date rather than continuing to use an old or discoloured bottle.

Precautions: Use Winwa Yellow Lotion 0.4% on unbroken or minor broken skin only, and avoid applying it over very large areas of skin or on severe burns without medical supervision. Pregnant or breastfeeding individuals, and those with known sensitivities to dyes or preservatives, should check the ingredient list and seek pharmacist advice if uncertain. Keep away from children’s reach, as the bright colour and liquid form can be mistaken for a drink.

When to See a Doctor or Pharmacist: Seek medical or pharmacist advice if a wound shows signs of worsening infection, such as spreading redness, increasing pain, swelling, warmth, or pus, or if a treated area has not improved after several days of regular use. Seek immediate medical attention for deep wounds, animal or human bites, extensive burns, or any sign of a severe allergic reaction.