"i was on gianvi for about five years with minimal issues until i developed bilateral pulmonary embolisms (blood clots in my lungs).  the only thing that the doctors could find as to why i developed the blood clots was my birth control pill (gianvi).  after doing some research after the fact, i discovered that the hormone used in gianvi, drospirenone, makes you more likely to develop blood clots as compared to other birth control pills that do no have drospirenone.  i would have not taken this pill had i known that i had a higher chance of developing potentially deadly blood clots."