I don't really know why I vomited to be honest. I had some intestinal discomfort and a feeling of in-complete bowel movements over the last week... so I'm thinking it might be due to constipation or maybe a minor intestinal block. I wasn't 100% nauseated before the event (might be because of the Ondansetron), and I am not nauseated now... though my intestine are uncomfortable. All this means is I will not eat for the forseeable future.