I've only been taking it a couple of weeks, low dose (.5mg), but so far I seem to have a near constant dull headache, like a mild hangover or someone compressing my head, slightly raised blood pressure and feeling quite flat (but that could be other factors). Does it get better? I was hoping it would help with my memory, concentration and being irritable, although it's hard to know if they are peri-menopause symptoms or just general crap going on in my life currently.