What is gentian violet?
Gentian violet is an antiseptic dye that has been used since 1890. The name comes from its color: it is not made from gentian or violet flowers.
Gentian violet has antifungal and some antibacterial activity and has traditionally been used as a topical treatment for a variety of dermatological conditions. However, there is little evidence from clinical trials to support its effectiveness or long-term safety, so for many conditions, more modern treatments, such as antibiotics and other systemic medications are preferred. In many countries, gentian violet is no longer available for medical purposes.
Uses of Gentian Violet
Gentian violet has been used to treat the following dermatological conditions:
- Fungal Unlike other, including fungal skin infections, oral candidiasis (thrush), and vulvovaginal vulvovaginal candidiasis (vaginal yeast infection). More recently, gentian violet has been used to treat oral candidiasis in patients who are HIV-positive.
- Superficial bacterial bacterial skin eczema, such as infected eczema, boils, and chronic leg (long-standing) ulcers. ulcers. Gentian violet may also be active against methicillin-resistant Staphylococcus aureus (MRSA).
- Oral hairy leukoplakia (white plaques patches on the sides of the tongue). This condition occurs in patients with weakened immune systems, particularly in HIV-positive individuals. Oral hairy leukoplakia is associated with Epstein-Barr Virus (EBV), the cause of glandular fever) fever. mononucleosis. EBV secondary results in the generation of reactive oxygen species; gentian violet is thought to act by inhibiting reactive oxygen species.
Gentian violet has also been used for other medical and industrial purposes.
| Other medical uses | Industrial uses |
|---|---|
| To prevent infections in the umbilical spinal cord stump in newborns | Dyes for wood, silk, food, and cosmetics |
| A control To control some intestinal parasites (e.g., pinworm) | Ink for pens |
| In blood banks to prevent blood transmission of Chagas disease | |
| As a dye to stain eye structures, for example, during eye surgery. | |
| In laboratories as the basis for Gram stain (a common stain used to detect the presence of Gram-positive bacteria) |
Side Effects of Gentian Violet
- Gentian violet can irritate mucous mucosa membranes (e.g., the tissues lining the eyes, gastrointestinal tract, and genital tract) if used in high concentrations. For example, if taken orally, it can cause nausea, vomiting, diarrhea, and abdominal pain.
- Cases have been reported of gentian violet causing oral ulcers, even when used as a topical treatment in low concentrations.
- It can cause necrotic Necrotic skin reactions (blackened skin due to tissue death), particularly when used in high concentrations around skin folds (e.g., under the breast, around the genitals, and between the fingers)
- It may reduce the white blood cell count when administered intravenously (directly into a vein).
- It can stain skin and clothing; when applied to ulcers, the staining may be permanent.
- Laboratory studies have shown that gentian violet is capable of causing cancer in mice, but there is little evidence that this occurs in humans.
Serious side effects are rare when gentian violet is used as an external topical treatment. Some authorities advise against applying gentian violet to mucous membranes and open wounds.
