Antiseptic and Antifungal dye
Last reviewed July 2026
Who is this for?
Methylrosanilinium chloride, commonly known as Gentian Violet, is a purple-coloured antiseptic dye that works by killing bacteria and fungi on the skin and mucous membranes, preventing them from growing and spreading.
Binds to fungal cell membranes and DNA, disrupting cellular integrity and inhibiting microbial growth while exerting direct antimicrobial effects against bacteria and fungi responsible for localized infections.
Mouth thrush (oral candidiasis), skin fungal infections, minor wound infections, ringworm, nappy rash caused by yeast, boils, and minor cuts or scrapes that may be infected
Available Over The Counter
Get this from any pharmacy or chemist: no prescription needed.
Is Methylrosanilinium safe to take with another drug?
Check with multiple drugs →Explore this drug
If you forget to apply it, just apply it as soon as you remember. If it is almost time for the next application, skip the missed one and continue as normal. Do not apply extra to make up for the missed dose.
Be aware that gentian violet stains everything purple, so protect your clothes, bedding, and furniture when applying. Buy only from registered pharmacies like Esoma or Nabicon branded products, not from roadside sellers where the concentration may be wrong. Do not swallow the solution; it is for external use only.
Gentian violet is applied on the skin, so it generally does not interact with other medicines you swallow. However, avoid using other topical creams or ointments on the same area at the same time, as this may reduce effectiveness. If you are using any other mouth treatments, space them apart.
Check your specific combination
Is it safe to take Methylrosanilinium with your other drugs?
Gentian violet is generally considered safe for external use during pregnancy and breastfeeding, but consult your doctor or pharmacist before using it, especially for mouth thrush while breastfeeding.
Store at room temperature, away from direct sunlight and heat. Keep the bottle tightly closed to prevent drying out. Store in a safe place away from children, as this dye stains everything it touches, including skin and clothes.
For information only: not medical advice. Always talk to a doctor or pharmacist before changing your medication.
Names this drug is sold under, especially in Nigerian and West African pharmacies
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Counterfeit Drug Warning
Fake drugs are a serious problem in Nigeria. Always buy from a registered pharmacy. If the packaging looks different from what is described above, do not use it.