"i have been taking yaz for around 5 months and am absolutely miserable. i felt fine over the first two months, and eventually the side effects reared its ugly head. i have never weighed this much in my life, i gained about 20 pounds. i cry every night and am extremely irritable, especially to my poor boyfriend who does not deserve any of it.  i was on loestrin 24 fe for around 2 years, worked as a birth control pill, didn&#039;t gain any weight, was able to lose weight, wasn&#039;t moody, only had slight acne... which is why my gynecologist put me on yaz. i&#039;d rather have terrible acne than feel the way i do on this pill."