What it does
Gentian violet is a dye that is used in medicine primarily for its antifungal and antibacterial properties.
Commonly used for: fungal infections, bacterial infections, skin conditions
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Source: Pharmacy and Medicines Regulatory Authority · fetched 2026-04-21 17:37:40 · updated 2026-09-15 04:32:43
About this medicine
Gentian violet is a dye that is used in medicine primarily for its antifungal and antibacterial properties.
What it treats
- fungal infections
- bacterial infections
- skin conditions
How it works
It fights infections by killing harmful bacteria and fungi.
Who it's for
It is suitable for people with certain skin infections or conditions as directed by a healthcare professional.
AI-assisted summary grounded in BNF data - general information only, not medical advice. Always confirm with your pharmacist or doctor.
Clinical monograph: gentianviolet
Gentian violet, also known as methylrosanilinium chloride, is a synthetic dye that has been used as an antiseptic and antifungal agent. It is primarily employed in the treatment of certain skin infections and as a topical antiseptic. Historically, it has been used in various dermatological conditions, but its use has diminished due to the availability of more effective and less toxic alternatives. Gentian violet exhibits broad-spectrum antimicrobial activity and is known for its vibrant purple color.
Indications
- Superficial skin infections
- Fungal infections
- Oral thrush
- Dermatitis
- Wound antisepsis
Dosage
Children: Refer to the BNF for Children for specific dosing recommendations, as pediatric doses must be tailored to the child's age and weight.
Adults: Refer to established guidelines or clinical protocols for specific dosing information, as doses can vary based on the condition being treated.
Mechanism of action
Gentian violet exerts its antimicrobial effects primarily through the disruption of cell membrane integrity and interference with nucleic acid synthesis. It binds to negatively charged cellular components, leading to cell lysis. Its ability to precipitate proteins and interact with cellular components contributes to its effectiveness against bacteria and fungi.
Pharmacodynamics
Gentian violet demonstrates bactericidal and fungicidal properties. It is effective against a wide range of Gram-positive and some Gram-negative bacteria, as well as various fungi. The dye's mechanism involves creating a toxic environment for microbial growth, leading to cell death. Its activity against dermatophytes makes it a valuable agent in treating superficial fungal infections.
Pharmacokinetics
Gentian violet is primarily applied topically, and its systemic absorption is minimal when used in recommended doses. The pharmacokinetics of gentian violet are not extensively studied due to its topical use. Local tissue concentrations can be relatively high while systemic levels remain low. Its excretion pathways are not well defined, but it is expected to be eliminated primarily through the feces.
Adverse effects
- Skin irritation
- Allergic reactions
- Staining of skin and fabrics
- Potential carcinogenic effects with prolonged use
Precautions
- Avoid contact with eyes
- Use with caution in patients with hypersensitivity to the dye
- Not recommended for use on large areas of the skin or mucous membranes
Pregnancy
Use during pregnancy is not well-studied; should be used only if clearly needed and prescribed.
Breast-feeding
Caution is advised; consult a healthcare provider before use.
Storage
Store in a cool, dry place away from light. Keep container tightly closed.
Formulations
- Topical solution
- Aqueous solution
AI-synthesized from BNF references - general information only, not a substitute for professional medical advice or the current BNF. Verify doses with a pharmacist.