If you experience any of the following signs or symptoms, seek medical attention.

• Frequent episodes of vomiting and inability to keep liquids down
• Bloody vomit or stools
• Diarrhea for more than three days
• Extreme pain or severe abdominal cramping
• An oral temperature higher than 100.4 F (38 C)
• Signs or symptoms of dehydration — excessive thirst, dry mouth, little or no urination, severe weakness, dizziness, or light-headedness
• Neurological symptoms such as blurry vision, muscle weakness and tingling in the arms