Canesten soft gel pessary gives you effective treatment for thrush yeast infections it works right at the site of infection and provides treatment in a single dose it is not recommended for use for children under 16 symptomatic treatment canesten pessaries are teardrop shaped soft capsules that can be inserted at night it contains the active ingredient clotrimazole which promotes ph balance and healthy bacteria and treats any signs of fungal infection and itching what causes thrush thrush