I had finally gotten my TSH to around 2.2 adn was on 0.025 mcg of Synthroid. However, I was not able to lose any weight so, I think my thyroid medication needed to be increased. Then I started the pill - on Yasmin - and after about 2 months of being on the pill I went and had my bloodwork done and my TSK had shot up to 5 -so, my endo increased the synthroid to 0.05. I am 41 years old and the Yasmin has really helped with my irregular periods - however, I am really concerned if this is what made my TSH level go higher. Actually, even before I started the pill (about 3 months ago) I was unable to lose any weight even though I was on a strict diet and that's when I was taking the 0.025 dosage. I don't know if I should stop the BCP - or get the bloodwork done again - the endo had increased my synthroid to 0.05 two months ago but, the weight will still not budge - Do I stop the BCP - take more synthroid? Or, do I need to be looking at adding something else - T3 maybe? I also thought that my TSH might have gone up because I was eating a lot of Tofu - but, I haven't touched it in two months and the weight will not budge. Thanks!!!
any BCP w/ estrogen has the potential to increase thyroxine requirement. -- would retest TSH 6-8 weeks after starting the BCP -- the timing does not matter -- it's the effect of the estrogen in the blood increasing thyroid-binding-globulin. It's fine to take both these meds, but you are right that BCP can alter thyroid med requirements.