What should I do for abdominal pain, nausea, vomiting, and diarrhea?

The patient presents with abdominal pain, nausea, vomiting, and diarrhea—findings highly suggestive of acute gastroenteritis or acute gastritis. Gastrointestinal influenza (viral gastroenteritis) should also be considered. Nausea, vomiting, and diarrhea can lead to significant loss of water and electrolytes; therefore, the patient should undergo hospital-based diagnostic testing, including stool routine examination, complete blood count (CBC), and serum electrolyte and biochemical panels.

If bacterial infection is suspected, antibiotic therapy should be initiated. If laboratory results reveal substantial electrolyte depletion (e.g., hyponatremia or hypokalemia), prompt replacement of sodium, potassium, and other electrolytes is required.

If gastrointestinal influenza is confirmed, antiviral therapy is indicated, along with medications to protect the gastric mucosa and to control diarrhea and abdominal pain. Commonly used agents include omeprazole and anisodamine (654-2).

During this illness, dietary modifications are essential: avoid spicy, fried, and other irritating foods; abstain from alcohol; and consume bland, easily digestible foods such as congee (rice porridge).