How common is vomiting in food poisoning?

Food poisoning irritates the digestive tract, which can trigger the body to empty the stomach. Symptoms may begin after eating contaminated food or drink, but timing varies with the cause. Vomiting alone cannot identify food poisoning; stomach viruses, medicines, pregnancy, and other conditions can look similar. The main immediate concern is losing fluid and salts, especially when vomiting occurs with diarrhoea.

Take small, frequent sips of water or an oral rehydration drink rather than drinking a large amount at once. Once vomiting eases, try light foods as tolerated and avoid alcohol and foods that worsen nausea. Wash hands with soap and water, clean contaminated surfaces, and avoid preparing food for others while unwell. Do not take anti-vomiting or anti-diarrhoeal medicines without checking that they are suitable for you.

Seek urgent care for blood or coffee-ground material in vomit, severe or worsening abdominal pain, confusion, fainting, difficulty breathing, or signs of serious dehydration such as very little urine. Get prompt advice if you cannot keep fluids down, symptoms are severe, or the illness affects a young child, an older adult, or someone with a significant medical condition. Contact a clinician if vomiting continues or does not begin to settle.

Could another illness explain my vomiting? Which rehydration drink is suitable for me? When can I return to normal meals? Should anyone else who ate the same food be assessed?