Levonelle is proven to be effective at preventing pregnancy for up to 3 days after unprotected sex. However, it is more likely to be effective the earlier you take it. It is thought to prevent 95% of pregnancies if taken within 24 hours, 85% if taken within 48 hours, and 58% if taken within 72 hours. Please note, Levonelle does not give any protection against sexually transmitted infections.
Most commonly headache, nausea and vomiting, tender breasts, feeling tired.
Always read the patient information leaflet before commencing treatment.