"i have been on kariva for three months now. it has been the first birth control i have tried and it seems to work in the area of birth control as i have not become pregnant. however, i have had my period for eight days every two weeks and finally figured out that my depression systems may have been caused by it; i&#039;ve been terribly moody, depressed, and cry way more often than normal once i started taking kariva. sleep disruptions, loss of appetite, and lower sex drive have also been symptoms i&#039;ve experienced."