"i love this pill!!! i was having a continuous period for 3 weeks from taking loestrin after deciding i would start birth control because of my irregular periods. went back to my gyn told her that loestrin wasn&#039;t working for me and that i was still bleeding. she then prescribed me kariva cuz she said i needed a higher dose of estrogen. kariva stopped my heavy period in 1 day. i will say that u will definitely notice a change within yourself when taking this pill, not in a bad way but u will feel the changes your body is making &amp; a change in mood while your body starts to adjust. that was my only side effect."