How do you take Crystal Violet?

This medicine is applied directly on the skin or inside the mouth, not swallowed. For skin infections, use a cotton swab to paint the affected area once or twice daily. For mouth thrush, dip a clean cotton swab in the solution and gently paint the white patches inside the mouth once daily. Do not use for more than 7 days unless your doctor says so.

What are the side effects of Crystal Violet?

Purple staining of the skin, clothes, and anything it touches; mild irritation or burning at the area where it is applied; dryness or peeling of the skin around the treated area

Who should not take Crystal Violet?

People who are allergic to Crystal Violet or any dye-based antiseptics should not use it. Do not apply on deep wounds, severe burns, or open ulcers. Avoid use on newborns under 1 month old without medical supervision. Do not use inside the eyes.

OTC

Antiseptic and Antifungal dye

Crystal Violet

Q: What is Crystal Violet used for?

Mouth thrush (oral candidiasis), skin fungal infections, ringworm, minor wound infections, nipple thrush in breastfeeding mothers, skin sores

Last reviewed July 2026

Who is this for?

For adults (18+). Standard adult dosing applies: see the How to Take tab for full instructions.

What is this drug?

Crystal Violet (also called Gentian Violet) is an antiseptic dye that works by killing bacteria, fungi, and some parasites on the skin and in the mouth. It stains the affected area purple as it fights the infection.

How it works

Binds to fungal cell membrane and DNA, disrupting cellular integrity and inhibiting microbial protein synthesis, thereby exerting fungistatic and bacteriostatic effects against susceptible organisms including Candida species and dermatophytes.

What is it used for?

Mouth thrush (oral candidiasis)skin fungal infectionsringwormminor wound infectionsnipple thrush in breastfeeding mothersskin sores

Browse by condition

Skin Infections Fungal Infections Wound Care & Antiseptics Topical Antibiotics & Antiseptics

Available Over The Counter

Get this from any pharmacy or chemist: no prescription needed.

Quick Interaction Check

Is Crystal safe to take with another drug?

Check with multiple drugs →

Similar drugs

Methylrosanilinium Chloride

Explore this drug

What to watch out for

Buy from reputable pharmacies, such as products like Nino Gentian Violet Paint or Ugolab Gentian Violet Solution, which are well-known brands in Nigeria. Be prepared for heavy purple staining on skin, clothes, and bedding. Do not use for longer than one week without seeing a doctor, as prolonged use on the mouth or skin can cause irritation or sores.

Common Side Effects

Purple staining of the skin
clothes
and anything it touches; mild irritation or burning at the area where it is applied; dryness or peeling of the skin around the treated area

Serious Side Effects

Severe skin irritation
blistering
or ulceration at the application site: stop using it and see a doctor immediately. If accidentally swallowed in large amounts
it can cause nausea
vomiting
and stomach pain
so seek emergency medical help.

Drug Interactions

Do not apply other topical creams or ointments on the same area at the same time as Crystal Violet, as this may reduce its effectiveness or increase irritation. There are no major food or alcohol interactions since it is applied on the skin, not taken by mouth.

Check your specific combination

Is it safe to take Crystal with your other drugs?

Check →

Pregnancy & Breastfeeding Warning

Crystal Violet is generally considered safe for external use during pregnancy and breastfeeding, but consult your doctor or pharmacist before using it, especially for nipple thrush while breastfeeding.

Who Should NOT Take This

People who are allergic to Crystal Violet or any dye-based antiseptics should not use it. Do not apply on deep wounds
severe burns
or open ulcers. Avoid use on newborns under 1 month old without medical supervision. Do not use inside the eyes.

How to Store

Store in a cool, dry place away from direct sunlight and heat. Keep the bottle tightly closed to prevent the solution from drying out. Keep far away from children, as the purple stain is very difficult to remove from clothes and surfaces.

For information only: not medical advice. Always talk to a doctor or pharmacist before changing your medication.