When taken regularly, the contraceptive pill is over 98% effective at preventing pregnancy whereas morning after pills are only around 75% effective at preventing pregnancy. This means that when taken regularly, contraceptive pills offer superior protection against pregnancy and should not be supplemented with morning after pills. The ellaOne can also interfere with how the contraceptive pill works and reduce its efficacy.
Therefore, if you take the contraceptive pill, unless there is a reason why the contraceptive pill's efficacy is reduced, for example you missed two or more doses of the pill (or one or more doses if you are on the mini-pill), or you have had diarrhoea or vomiting, you should not take a morning after pill if you have had unprotected sex or a condom broke.
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