Gastroenteritis

Medically reviewed by Drugs.com. Last updated on Apr 6, 2025.

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What is gastroenteritis?

Gastroenteritis, or stomach flu, is an infection of the stomach and intestines. Causes may include bacteria, parasites, viruses, chemicals, or reactions to medicines.

What increases my risk for gastroenteritis?

• Close contact with an infected person or animal
• Age older than 65
• Travel to other countries
• Eating spoiled food such as eggs, raw vegetables, shellfish, or meat that is not fully cooked
• Drinking water that is not clean, such as when you camp or travel
• Certain medicines, such as antibiotics, antacids, or chemotherapy
• Conditions that weaken your immune system

What are the signs and symptoms of gastroenteritis?

• Diarrhea or gas
• Nausea, vomiting, or poor appetite
• Abdominal cramps, pain, or gurgling
• Fever
• Tiredness or weakness
• Headache or muscle aches

How is gastroenteritis diagnosed and treated?

Your healthcare provider will ask about your medical history and symptoms. Your provider will examine you and check for signs of dehydration. Tell your provider how often you are vomiting or have diarrhea and what medicines you take. You may need a blood or bowel movement sample tested for the germ causing your gastroenteritis. Symptoms may go away without treatment. Medicines may be given to slow or stop your diarrhea or vomiting. You may also need medicines to treat an infection caused by bacteria or a parasite.

How can I manage my gastroenteritis?

• Drink liquids as directed. Ask your healthcare provider how much liquid to drink each day, and which liquids are best for you. You may also need to drink an oral rehydration solution (ORS). An ORS has the right amounts of sugar, salt, and minerals in water to replace body fluids.
• Eat bland foods. When you feel hungry, begin eating soft, bland foods. Examples are bananas, clear soup, potatoes, and applesauce. Do not have dairy products, alcohol, sugary drinks, or drinks with caffeine until you feel better. Avoid eating high-fat or fast foods.
• Eat small, frequent meals throughout the day. Your stomach may tolerate small meals every 2 to 3 hours instead of 3 large meals.
• Rest as much as possible. Slowly start to do more each day when you begin to feel better.

Treatment options

The following list of medications are related to or used in the treatment of this condition.

• ondansetron
• Vibramycin
• Doxy 100
• Monodox
• Doryx

View more treatment options

How can I prevent gastroenteritis?

Gastroenteritis can spread easily. Keep yourself, your family, and your surroundings clean to help prevent the spread of gastroenteritis:

• Wash your hands often. Use soap and water. Wash your hands after you use the bathroom, change a child's diapers, or sneeze. Wash your hands before you prepare or eat food.
• Clean surfaces and do laundry often. Wash your clothes and towels separately from the rest of the laundry. Clean surfaces in your home with antibacterial cleaner or bleach.
• Clean food thoroughly and cook safely. Wash raw vegetables before you cook. Cook meat, fish, and eggs fully. Do not use the same dishes for raw meat as you do for other foods. Refrigerate any leftover food immediately.
• Be aware when you camp or travel. Drink only clean water. Do not drink from rivers or lakes unless you purify or boil the water first. When you travel, drink bottled water and do not add ice. Do not eat fruit that has not been peeled. Do not eat raw fish or meat that is not fully cooked.

When should I seek immediate care?

• You see blood in your vomit or diarrhea.
• You cannot stop vomiting.
• You have severe abdominal pain, or your abdomen is swollen.
• You have not urinated for 12 hours.
• You feel like you are going to faint.

When should I call my doctor?

• You have a fever that does not go away.
• You continue to vomit or have diarrhea, even after treatment.
• You see worms in your diarrhea.
• Your mouth or eyes are dry. You are not urinating as much or as often.
• You have questions or concerns about your condition or care.

Care Agreement

You have the right to help plan your care. Learn about your health condition and how it may be treated. Discuss treatment options with your healthcare providers to decide what care you want to receive. You always have the right to refuse treatment. The above information is an educational aid only. It is not intended as medical advice for individual conditions or treatments. Talk to your doctor, nurse or pharmacist before following any medical regimen to see if it is safe and effective for you.

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