"i was on gildess for 3 months, it was my first experience with hormonal birth control. for one thing i didn&#039;t get pregnant while taking it so it does its job! i did have some unpleasant side effects though. i had constipation/gas while i was on it along with some mood swings, although i can&#039;t be 100% sure that these things were actually caused/worsened by the pill. the pill did cause nausea (mostly during the first month), swollen &amp; sore breasts (mostly during the 3rd month), and a bit of acne. my periods were extremely light on this pill. during the first month i had cramps (usually very mild) every day, then a normal period 2 weeks into the pack, followed by spotting with mild cramps until i finished that pack."