An antacid or an H 2 blocker such as cimetidine, ranitidine, or famotidine can be tried for a short time. If the person has a Helicobacter pylori infection in the stomach lining, a doctor usually prescribes bismuth subsalicylate and an antibiotic such as amoxicillin or metronidazole. Nausea and Vomiting Nausea is an unpleasant feeling in the abdomen that often ends with vomiting. Vomiting is the forceful expulsion of stomach contents through the mouth. Nausea and vomiting are caused by activation of the vomiting center in the brain.
Vomiting is one of the more dramatic ways that the body eliminates harmful substances.
It may be caused by eating or swallowing an irritating or poisonous substance or food that has spoiled. Some people become nauseated and may vomit from the movement of a boat, car, or airplane. Also, irritation or inflammation of the stomach, intestine, or gallbladder can cause vomiting. Psychogenic vomiting also may result from a threatening or distasteful situation that causes anxiety. In some cases, psychologic factors that cause vomiting depend on a person's cultural background.