Hi again Artmouse
I also get headaches now and again on utrogestan but I understood from your comments that you got a headache AFTER stopping utrogestan which is due to progesterone withdrawal. I hope they have eased now - but if still continuing in the absence of taking utrogestan - then must be due to some other cause.
Just to re-iterate that if you are peri-menopausal the licensed dose is 200 mg x 12 days. As Mary G says this can be varied - but only under supervision of your doctor - but sounds like your GP doesn't seem to know this. Surprising because the info is on this website and readily available to medics (and laypeople) on the web!
If you can - best to start with the licensed dose and take it from there. The withdrawal headache - may unfortunately happen each cycle - although it didn't with me, just sometimes. I now ease my way on and off the progesterone phase by spreading the first and last dose over two days ie 100 mg x 2 days 200 mg x 10 days then 100 mg x two days - which seems to help avoid the sudden fluctuations.
If you are getting headaches and nausea WHILE you are taking the utrogestan then taking it vaginally will help to prevent the nausea and should help to minimise the headaches too because oral use produces many more side effects due to the metabolic breakdown products (going through the liver).
Hope this helps
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Hurdity x