This pessary (also known as a “vaginal tablet”) contains Clotrimazole which belongs to a group of medicines called anti-fungals which act to treat infections caused by fungi. It can be used to treat thrush (vaginal candidiasis). Thrush is a common infection caused by a yeast (or fungus) which may live harmlessly in the vagina without you even noticing it. However in certain circumstances it may develop into an infection in the vagina and symptoms may spread to the surrounding area. These symptoms may include one or more of the following: Itching of the vagina and surrounding area (the vulva). Redness and swelling of the tissues of the vagina and vulva. Soreness of the vagina and vulva. A white non-smelling discharge from the vagina. Thrush may be aggravated by sexual intercourse but it is not a sexually transmitted disease. Sometimes however thrush can be passed to your partner through sexual intercourse. If your partner has penile thrush he may have one or more of the following symptoms: Soreness and redness of the penis. Tightness of the foreskin. A white non-smelling penile discharge.