I've googled this so many times and have gotten such different info I'm not sure which is correct. I'm concerned because I took some for pain before I knew I was pregnant (at two different times) and the most recent info I found on it is that it is a category C but there qre cases where it has caused congenital heart defects when taken in first trimester! I will ask my OB but I won't get in to see him for another two weeks :( Does anyone have any personal experience with this? Trying to ease my mind.....