"i was put on yaz earlier this year by my regular doctor. within a week of taking yaz, i had severe pain in my abdomen, i couldn&#039;t breathe without being in excruciating pain. a week later i was worse, i was in the worst pain i&#039;d ever felt constantly. i went back to the dr and after a week of testing and hundreds of dollars found out i have a gall bladder infection and may have to have surgery to remove my gall bladder.  luckily, medication cleared it up after a few days. since then i have found out that there is actually a number of class actions, in a number of different countries including australia &amp; canada, against the maker of yaz due to the immense number of adversely effected women. dont go near it!!"