Birth control pills can somtimes interfere with the absorption of Synthroid and being on BCP may cause you to have a higher dose of Synthroid. Can take take them together, but make sure that you ALWAYS take your Synthroid the same way everyday.
When I started taking Yaz, I had about a week of feeling hyperthyroid. It was weird, but I got a lot of cleaning done around the house! I chalk the rush up to another hormone in my body and my body freaking out
Cynthia