Kitty, I took vitamin B6 during my last pregnancy and I had absolutely no 24 hr nausea and vomiting as with previous pregnancies. Then a nurse confirmed for me that the so-called "morning sickness" (that's a joke!) is caused by a B6 deficiency. She could have told me that about 12 yrs earlier! I had to take it daily, but only when I could "stomach" food, too. It wasn't a problem because I was taking it from the get-go even before I knew I was preggers.
Noel