If dehydration is severe, you may need intravenous fluids. This may require hospitalization, although it can often be done in the doctor's office. The use of antivomiting drugs (anti-emetics) is controversial, and they should be used only in severe cases.
Prevention:
A number of medicines are effective at preventing vomiting. Your doctor is unlikely to prescribe these because, in most situations, the vomiting is an important part of getting well. In some situations, however, preventing the vomiting makes life much better.
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