"so i was put on the birth control kariva and i never got pregnant and it was the only form of birth control i used, so in that effect it worked. however, i experienced severe migraines that were bad enough. they checked me for a tumor, decreased sex drive, tired, nervous, dizziness, weight change, appetite change, and numbness on the left arm and hand. i have been off this birth control for just a few weeks and i am already feeling back to normal. "