Are the prescription prenatal vitamins the same as the ones bought at the store?

[Nikki]

I was mostly wondering because I am breastfeeding and ran out of my prescription, but i'm also curious. I guess I just assume that they are better or have more because they are a prescription, but I wouldn't see why they would want to deprive you of a better vitamin if you were trying to conceive or in my case breastfeeding...