The new preparation is started after the usual 7 day break, e.g. after completion of an every day packet of a combined oral contraceptive pill. No extra contraceptive precautions are required for the first 7 days of use of the new preparation.
Reference:
Add information to this page that would be handy to have on hand during a consultation, such as a web address or phone number. This information will always be displayed when you visit this page