You have unprotected sex again after taking Levonelle One Step®
You have already had unprotected sex earlier in your menstrual cycle
You vomit within 3 hours of taking Levonelle One Step®. (Being Sick)
You were already pregnant when you took Levonelle One Step®
Another medication that you are taking may have reduced the effectiveness of Levonelle One Step® (e.g. certain anti-epileptic drugs and tuberculosis treatments)
You have a medical condition that stops Levonelle One Step® being absorbed properly, such as Crohn's disease
