Call Your Doctor Now (night or day) If

• You feel weak or very sick
• Vomiting red blood or black ("coffee grounds")
• Severe abdominal pain
• Constant abdominal pain lasting more than 2 hours
• Multiple episodes of vomiting, and lasting more than 2 hours
• Feeling very shaky (i.e., visible tremors of hands)
• White of the eyes have turned yellow (i.e., jaundice)