There are two types of emergency oral contraception available in Australia. One contains Ulipristal Acetate (known as EllaOne® in Australia) and can be effective within five days (120 hours) of having unprotected sex.
The other contains levonorgestrel, which can be effective within three days (72 hours) of having unprotected sex. Both emergency contraceptives are more effective the sooner you take them, and most effective when taken within 24 hours of unprotected sex.
EllaOne® is 2.5 times more effective than levonorgestrel when taken within the first 24 hours* (for verification, see here). To find out if EllaOne® is suitable for you, take a look at the EllaOne® suitability checklist.
The morning after pill is available to buy, without prescription, from pharmacies and can also be provided at sexual health clinics and from your GP.