Uy, ako naman hindi nag-take ng Heragest kasi di rin ako recommended nung OB ko, pero a few of my mum friends who took it for their pregnancies said some felt dizzy talaga, especially pag taken on an empty stomach, kaya sinabihan nila akong eat something muna before taking vitamins! Since different ang reaction ng bawat pregnant mom, better to ask your OB about the dizziness na naramdaman mo kasi baka need ng adjustment sa dosage or timing, basta sure na safe sa baby mo.