Gentian violet is a topical, over-the-counter antifungal treatment indicated to treat thrush, a fungal infection of the mouth or skin. This medication works by preventing the growth and spread of the Candida mycosis. Before using this topical medication, be sure to discuss the side effects of gentian violet with your medical provider.
Oral Irritation
You may experience mild to moderate oral irritation as a side effect of treatment with gentian violet. If you apply this antifungal treatment to the inside of your mouth, the treated skin region may appear red, inflamed or swollen. The affected skin region may also be tender or sensitive to the touch. Attempting to scratch your irritated tongue or the inside of your cheeks may increase your risk of developing an oral skin infection. Symptoms associated with a skin infection include skin warmth and pus accumulation. If oral irritation persists, becomes worse or signals an infection, seek prompt care from your physician.
Oral Skin Discoloration
Gentian violet will temporarily cause the treated skin region, such as your tongue or lips, to appear violet or purple in color. Such side effects may be embarrassing to treated people, but typically subside within a few days of treatment. Gentian violet should be applied with care, as this medication may permanently stain clothing.
Allergic Reaction
Let your doctor know if you are allergic to any dyes, food preservatives or other medications. Improper use of gentian violet by hypersensitive people may cause a severe allergic reaction. Allergic reaction symptoms include itching, hives, rash, cough, shortness of breath, facial swelling and wheezing. Contact an emergency medical provider immediately if such side effects arise. Without prompt medical intervention, an allergic reaction to gentian violet may cause life-threatening health complications.
Overdose
Applying more than the recommended amount of gentian violet inside your mouth may result in an overdose. Overdose symptoms require immediate medical care and include diarrhea, nausea and vomiting, Kaiser Permanente warns.
Contraindications
Inform your health care provider of all health problems or concerns you may have before using gentian violet. Do not use gentian violet if you have an ulcerative skin condition, as this medication may permanently discolor your skin. Additionally, health professionals with Kids Health report that gentian violet should not be used by people with porphyria -- a class of genetic disorders that affect the central nervous system and skin.
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