Thrush Buster is no longer available
Health Canada has completed a safety review of human health products and veterinary drugs containing gentian violet and has found that exposure to these products may increase the risk of cancer. Given the seriousness of this risk, Health Canada is advising Canadians to stop using all human and veterinary drug products containing gentian violet.
In Canada, there are nine registered veterinary drug products containing gentian violet, including Thrush Buster, Blu Kote Dr Naylor, Cristisol, Guard and Wound Spray and Wound Clear Spray.
These products are used to treat surface wounds and eye infections in food-producing and companion animals (e.g., cattle, poultry, horses, dogs, cats). All manufacturers have voluntarily stopped marketing these products, their product licences have been cancelled, and any products that were on the Canadian market have been recalled.