"i have tried many different kinds of birth control and had been off for about a year and half when i started up on chateal.  i am in my third week of the pill and have experienced extreme fatigue, mood swings as well as breast tenderness/shooting pain, and constipation.  i am hoping these things will smooth over, but these are the worst initial side effects i&#039;ve experienced with an oral contraceptive.  so far not so good."