Ethinylestradiol/levonorgestrel is a combined birth control pill made up of ethinylestradiol and levonorgestrel, which in turn is a hormonal medication used in a number of birth control methods. Ethinylestradiol/levonorgestrel is used for birth control, symptoms of menstruation, endometriosis, and as emergency contraception. This medicine basically works by stopping ovulation, making the mucus at the opening to the cervix thick, and also making the uterus not suitable for implantation. When it comes to its side effects, it is worth noting that Ethinylestradiol/levonorgestrel can cause nausea, headache, blood clots, breast pain, depression, and liver problems. Bear in mind that its use is not recommended during pregnancy, nor during the initial three weeks after childbirth. However, you can use it immediately after a miscarriage or abortion. Additionally, you have to remember that doctors do not recommend smoking while using combined birth control pills.