My name is Linda. I have been vomiting food up evrry so often for the past several months. I have lost 50 or pounds of weigth, most of it in the last 3 months. Ihave ben to my doctor, also emerg 3 or 4 time in the last 25 days . I have sevral blood test for mostly bactiera.doc gave me ondansetron yesterday, first pill helped fo app. 5 hours I am still vomiting and in pain. The pain comes on cramping my upper stomach and most times I vomit. I am so don in a hav no strength. I did hav total knee surgery on may 14, 2015, 10 days. Later I got cellulitis. Thst is gone now.