Canesten Oral Fluconazole Capsule is an effective single dose treatment for vaginal thrush. It can also be used to treat men who are suffering from thrush on the penis. Swallow the capsule whole with a glass of water (with or without food). What is thrush? Thrush is an infection caused by a yeast called Candida. This yeast normally lives in your body quite happily without doing you any harm. But when the natural pH balance of your vagina is upset - which can easily happen - Candida can multiply....