Hi Peacegirl, sorry to hear you are having probs balancing HRT with thyroid meds. It's usually said that only oral oestrogen interacts but like you, I've found my thyroid meds have needed adjusting on transdermal as well. That said, it should be possible to combine the two, but fine tuning while you find your best fit will likely require more frequent TFTs than the NHS is sometimes willing to approve. Personally I'm persevering, trying to find a regimen that controls my menopause symptoms more effectively, but my thyroid is currently pretty well controlled on my current combo of T4/T3 & I'm lucky to have great support from a very good Endocrinologist who oversees both thyroid & HRT for me & is willing to work with me long term.
If your thyroid is still functioning to a degree as you say, I wonder whether this perhaps more than HRT interaction, could be why you are experiencing fluctuations in your thyroid hormone levels. I was told years ago by my then Endo that those of us with some remaining functioning thyroid (me too) are the hardest to treat, the gland sputtering on producing in an erratic manner. I certainly found peri & the initial years postmenopause very difficult, with life-wrecking symptoms exacerbated by the thyroid condition.
I understand your feeling that stopping HRT could make the thyroid situation simpler & if that's what you really want you could try & see how you feel. If after a reasonable time to settle from any withdrawal effects, your menopause symptoms are more problematical than your current situation, you could always go back on HRT.
I would just say in terms of menopause symptom control that I've found my body copes better with the continual release of patches than with spikes from gel. I know over time gel is said to build to constant levels, but I wonder whether those of us with thyroid conditions whose homoeostasis is chronically compromised, need our sex hormone levels to be very steady indeed for best symptom management & overall optimal health.
Will stopping nullify the benefits for my bones/brain/anything else? I.e. do I need it for life to ensure these benefits?
My understanding is that protective effects for bone decline once HRT is stopped, but I think the other benefits you mention are still somewhat hotly debated between those authorities in favour & those more cautious about risk!
I hope whatever you decide you soon start to feel much better. Please let us know how you get on.
Wx