Is emergency contraception done with levonorgestrel?

Levonorgestrel is a progestogen. Emergency contraception works mainly by delaying or preventing ovulation; it does not end an established pregnancy. It is intended for occasional emergency use, not as a replacement for an ongoing contraceptive method. It also does not protect against sexually transmitted infections. A pharmacist or clinician can help check whether it is suitable with your medical history and other medicines.

Take it as soon as possible after unprotected sex or contraceptive failure, following the product instructions or a clinician’s advice. Tell the pharmacist if you take regular medicines, especially those that may affect hormone breakdown. Your next period may come earlier or later than expected. Use condoms or another reliable method afterward, because levonorgestrel does not provide continuing protection for the rest of the cycle.

Contact a clinician if your period is substantially late, unusually light, or accompanied by unusual pain, because a pregnancy test or further assessment may be needed. Seek urgent care for severe one-sided lower-abdominal pain, fainting, or heavy bleeding. Ask for advice if you vomit soon after taking the medicine, as another dose or a different option may be considered.

Is levonorgestrel appropriate for me and my medicines? What should I do if I vomit after taking it? When should I test for pregnancy, and what ongoing contraception would suit me?