The patient later decides that she would like to start on re…
The patient later decides that she would like to start on regular contraception. After discussing the available options she chooses to start a combined oral contraceptive Mercilon (ethinylestradiol 20 micrograms / desogestrel 150 micrograms). She is on day 8 of her menstrual cycle. How long will it take for Mercilon to become fully effective, so she can safely stop using condoms?