I have taken it since I was about 9-12 weeks, somewhere around then, I am now 29 weeks and 4 days with a healthy baby girl :D ftm I had very very bad nausea and vomiting, still do occasionally now, but when I do it gets BAD! I just got headaches from it, I was constipated but I think that just had to do with being pregnant in general and I don't think the zofran helped with that lol
It made me constipated lol