Hi Cathh3110
Sorry to hear about your migraine. Did they occur at a particular point in the cycle of tablets? Some women find that the progestogen in these tablets (norethisterone) causes headaches/migraines, and it is common to experience a "progesterone withdrawal" headache after swapping back to the oestrogen only pills after the end of the first packet.
If either of these reasons are the case of your migraine you may still get one on the Evorel sequi as they do contain the same progestogen.
However for migraine generally transdermal HRT ( patches) is recommended so hopefully you will be OK.
This was the first HRT I tried many years ago (these patches) but I didn't get on with them because the norethisterone gave me a migraine! There are many women who are fine with them so good luck and hope it work for you - do keep us posted
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Hurdity x