Yaz Side Effects: I started using YAZ about 6 months ago. When I first started on t http://www.medications.com/effect/view/42705 I started using YAZ about 6 months ago. When I first started on this birth control I would get really bad headaches and nausea. For the past couple of months the side effects have gotten worse. I haven't had a period that lasted more than 2 days for the las im on yaz also only it really helped me. but ive noticed that som Fri, 03 Jul 2009 09:40:20 -0400 http://www.medications.com/effect/view/42705?item=21138 im on yaz also only it really helped me. but ive noticed that some months i wont get a period and other months its right before i start a new pack. now my doctor has me taking it for 3 straight months skipping the white pill and only having 4 a year. as lo http://www.medications.com/effect/view/42705?item=21138