just once ? I can do it twice in that time ! <| sep |> Haha , Where I grew up they would give us Metoclopramide if we had to go to hospital for v which I did a bunch of time , before the phobia and after . It is easily purchased there so I always have some and it works well . If I am genuinely very sick and take it late it won ' t , but if I feel nausea starting and take it I don ' t usually v whether that is because I wouldn ' t have anyway , or because it works I will obviously never know . My wife was prescribed ondansetron a few months ago for a concussion and they gave her quite a lot of it . I have taken a few of those and they work too , probably shutting the nausea down much faster I ' d say but I am not 100 %. I think both my wife ad I may have had a light norovirus 2 weeks ago 30 girls in our team came down with it in one weekend and we were at the same game with them and took the ondansetron and did not v though she felt really bad nausea . I took it as soon as I felt the smallest inkling of nausea and managed to avoid even feeling too ill though i had some d for a few days and no appetite for the better part of a week . I don ' t really get any side effects from them other than a dry mouth with the metoclopramide .