Levonelle is a branded form of emergency contraception that contains levonorgestrel. It works mainly by delaying ovulation so sperm cannot fertilise an egg. It does not affect an existing pregnancy and is most effective when taken as soon as possible after unprotected sex.

Levonelle is most effective when taken within 12–24 hours and becomes less reliable as more time passes. It can be taken up to 72 hours after unprotected sex, but earlier use gives the best protection. While not 100 percent effective, it significantly reduces the chance of pregnancy when taken promptly.

Levonelle can be taken up to 72 hours after unprotected sex, but its effectiveness decreases over time. Taking it within the first 24 hours gives the strongest protection. After 72 hours, it is unlikely to work, and alternatives such as ulipristal may be more effective.

Take one tablet as soon as possible after unprotected sex. Swallow it with water and do not repeat the dose unless advised by a clinician. You can restart or continue regular contraception afterwards, following professional guidance. Levonelle only protects you from this one incident, not for the rest of the month.

Side effects may include nausea, stomach discomfort, tiredness, tender breasts or mild headaches. Your next period may come slightly earlier or later. These changes are normally temporary. If you develop severe abdominal pain or signs of pregnancy, seek medical advice.

Levonelle may not be suitable for people with severe liver problems, certain digestive conditions or those taking medicines that affect hormone absorption. Body weight and timing in the menstrual cycle may also influence its effectiveness. A clinician can advise if another option is safer.

Both contain the same active ingredient and work in exactly the same way. The main differences are branding, packaging and cost. Generic levonorgestrel 1.5mg tablets are medically identical and provide the same level of effectiveness and safety.

Yes, Levonelle can still work the next morning, but effectiveness is highest when taken as soon as possible. Waiting reduces how well it delays ovulation, especially if you are close to your fertile window. Taking it immediately after the risk gives the strongest protection.

Yes. Levonelle is commonly used after missed pills, late pills, forgotten patches or condom failures. It helps reduce pregnancy risk but does not replace your regular contraception. Restart your usual method promptly and use extra protection for the recommended number of days.

Your period may come slightly earlier or later after taking Levonelle. Flow may be lighter or heavier than usual. These changes are temporary. If your period is more than seven days late or you notice symptoms of pregnancy, take a test to be sure.

Yes. Levonelle is safe for breastfeeding, although a small amount passes into milk. Feeding can continue normally. If you prefer, you can take the tablet just after breastfeeding to reduce exposure.

Certain medicines, such as epilepsy treatments or rifampicin, and herbal remedies like St John’s wort, can reduce Levonelle’s effectiveness. If you take interacting medicines, another emergency contraceptive may work better. Always mention your medication history during the consultation.

Yes, body weight can influence how well Levonelle works, particularly in women who weigh over 70 kg (155 lbs) or have a Body Mass Index (BMI) over 26. People above a certain weight may find it less effective, and ulipristal may be recommended instead. A clinician will advise the most suitable option based on your situation.

Yes, Levonelle can be used more than once in a cycle if necessary, although frequent use may make your periods irregular. It is not harmful long term, but ongoing contraception is a more reliable option. A clinician can help you choose a suitable method.

Take a test if your period is more than seven days late or if you have symptoms suggesting pregnancy. No emergency contraceptive is completely guaranteed, so testing helps confirm the outcome if your cycle changes unusually.