"my pharmacy switched me to gianvi a little over a year ago from yaz. i had no negative side effects on yaz (it was also the first birth control i&#039;ve ever taken). since switching to gianvi, i get severe headaches that lasts 1-2 days a week before my period starts, which force me to sleep in bed all day. my periods also start early, late, and trail on for a few days after they&#039;re usually supposed to end. my acne cleared up at first, but recently it&#039;s only my acne medication, benza-clin, that clears up my face. (yaz did the opposite of everything gianvi does, despite it being the &quot;generic&quot; equivalent). i&#039;m switching to a new birth control this week. i&#039;m going to try beyaz."