Flintstones vitamins and folic acid...is this ok?

I've been reading some questions and answers on here about the flintstone's vitamins. i have been taking them also because of the prenatal making me sick. the flintstones "complete" have 400 mcg of folic acid in one tablet and if I take 2 (which is what i have been doing all along) I am getting 800mcg of folic acid. Isn't that what we (pregnant women) are supposed to get??