Coil is most effective emergency contraception, says NICE Women requesting emergency contraception should be advised that a copper IUD is more effective than the emergency contraceptive pill, NICE has recommended. by Emma Bower Sign in to continue Sign In Email address Password Stay signed in Trouble signing in? Reset password: Click here Need help? Email us Register FREE Limited free articles a month Free email bulletins Register Now Register Now Take a 30-day trial Join MIMS now and pay nothing for the first 30 days Join GPOnline now and pay nothing for the first 30 days Sign Up Sign Up