http://www.medications.com/effect/view/43588 I just recently about 2 1/2 months ago switched from yaz to the nuvaring. Thank god. I have been struggling the last year with these symptoms: IBS, moodiness, anxiety attacks, palpitations, shortness of breath, headaches, SEVERE stomach cramps, and much muc Thu, 06 Aug 2009 22:04:14 +0000 http://www.medications.com/effect/view/43588?item=22093 Gabrilelle, I do not mean to scare you but the NuvaRing has the same type of combination (Ethinyl Estradiol+Progestin) combination synthetic hormones that Yaz contains. It isn't the brand that is the problem, but the combination of hormones. While on the r http://www.medications.com/effect/view/43588?item=22093