Drink liquids
Drink or sip liquids to avoid losing too much fluid (dehydration):

Clear liquids such as water or broth are the best choices.

Do not drink beverages with a lot of sugar in them, such as juices and sodas. These can make diarrhea worse.

If you have severe vomiting, do not drink sport drinks, such as electrolyte solutions. These don’t have the right mix of water, sugar, and minerals. They can also make the symptoms worse. In this situation, commercially available oral rehydration solutions are best.

Suck on ice chips if the thought of drinking something makes you queasy.

When you’re able to eat again
Tips include the following:

As your appetite comes back, you can resume your normal diet.

Ask your healthcare provider whether you should stay away from any foods.

Medicines
Know the following about medicines:

Vomiting and diarrhea are ways your body uses to rid itself of harmful substances such as bacteria. DO NOT use antidiarrheal or antivomiting (antiemetic) medicines unless your healthcare provider tells you to do so.

Aspirin, medicine with aspirin, and many aspirin substitutes can irritate your stomach. So avoid them when you have stomach upset.

Certain prescription and over-the-counter medicines can cause vomiting and diarrhea. Talk with your healthcare provider about any medicines you take that may be causing these symptoms.

Certain over-the-counter antihistamines can help control nausea. Other medicines can help soothe stomach upset. Ask your healthcare provider which medicines may help you.

When to call your healthcare provider
Call your healthcare provider if you have:

Bloody or black vomit or stools

Severe, steady belly pain

Vomiting with a severe headache or vomiting after a head injury

Vomiting and diarrhea together for more than an hour

An inability to hold down even sips of liquids for more than 12 hours

Vomiting that lasts more than 24 hours

Severe diarrhea that lasts more than 2 days

Yellowish color to your skin or the whites of your eyes

Inability to urinate. In infants and young children, not making wet diapers.