Do I need Emergency Contraception if I have missed a pill? Emergency Contraception may be required if you miss pills and sexual activity occurs without a condom being used. Emergency Contraception should particularly be considered for pills missed in the first week of ‘active’ pills, ie, the first 7 hormone pills taken after the 7 day break on the ‘inactive’ pills. Emergency Contraception is most effective when taken within 24 hours, but may be taken up to 120 hours (5 days) after unprotected sexual intercourse. It is available without a prescription from pharmacies, general practitioners (GPs), Sexual Health or True clinics.