I was on 500 mg/ twice a day to start off with for PCOS and was trying to get pregnant. However I was never able to get past the 500 mg/ twice a day as for the side effects were terrible I had severe nausea and vomiting every day all day long and couldn't keep nothing down (when I could eat) which lead to having stomach pains. I stopped taking it as for the side effects were way to severe for me to deal with.