They come in different strengths and should be used for the amount of time specified on the directions for use. A single large dose is often enough to clear a bout of thrush. Otherwise a lower dose is used for several days. There are a variety of creams and pessaries available in Aotearoa New Zealand. They will then recommend a suitable product, or may refer you to your doctor. Read more about vaginal thrush and thrush in men. Find a pharmacy near you. If you want to get a product from a pharmacy, your pharmacist will ask you a few questions regarding your symptoms to make sure you get the right product. They are available on prescription and some can be bought from your pharmacy without a prescription, after discussion with your pharmacist. Once treatment has started, thrush should clear up within a week. pessaries that are inserted into the vagina.creams to apply onto the affected area (on the vagina, inside of the vagina or on the penis).In Aotearoa New Zealand they are available as: Medicines for thrush are antifungal medicines. For the treatment of oral thrush see here. This page covers thrush treatment for the genital area. Thrush is treated with antifungal medicines, which kill the fungal cells and prevent them from growing and reproducing.