"I&#039;ve been on Chateal for about a year and a half.  I agree with many reviews that it&#039;s very effective for its intended purpose, but the side effects are awful.  I&#039;ve experienced extreme moodiness, irritability and depression, panic attacks, and what I believe was a burst ovarian cyst.  I&#039;ve also been experiencing acne on my chest and back which I&#039;ve never had before. A few months ago I ended up in the ER after having a severe panic attack and throwing up in the middle of the night.  I can&#039;t say that the Chateal was directly responsible for the burst cyst, but I&#039;m 30 years old and have been using BC since the age of 16 -- I&#039;ve never experience any of these conditions prior to using Chateal, save for your standard PMSing."