Climen is a type of combined oral contraceptive pill, typically used for birth control. It contains two hormones: estradiol valerate (a form of estrogen) and dienogest (a synthetic progestogen). These hormones help to regulate your menstrual cycle, prevent ovulation (the release of an egg from the ovaries), and thicken cervical mucus to prevent sperm from reaching the egg.The 21-tablet pack usually comes in a cycle of 21 active tablets, and they are taken daily for 21 days. After finishing the pack, a 7-day break is typically recommended during which you may experience a withdrawal bleed (similar to a period).