Hello SBM40, I took Menopace for a few months last year and thought they really helped with hot flushes and night sweats, without any side effects. However I then fainted for no reason. I contacted the manufacturers who said it was not a known effect but advised me to stop anyway, which I had done. They confirmed there are no real known side effects and I could have had an unknown sensitivity, so that may be the same with you. My Gp at the time suggested that my hormones had fluctuated causing drop in flushes/sweats rather than the Menopace - and possibly hormone surge caused the faint.
I hope you find something else that helps - Good luck!