I went to the ER for extreme morning sickness, they proscribed B6 and Zofran. The doctor said I could really take as many as I want because it only absorbs about 1/2 the dose. He prescribed 8mg every 6 hours. There were a couple times I had an hour or 2 overlap because I forgot when I took it. I found out that there is a lawsuit against its makers. Is it a safe drug? Have you used it?