Anzemet (generic: dolasetron) is a prescription medication used to prevent nausea and vomiting caused by chemotherapy or surgery.  Anzemet belongs to a group of drugs called serotonin 5-HT3 antagonists, which block serotonin, a natural chemical in the body, from causing nausea and vomiting.

This medication comes in tablet and injectable forms.  The tablet is taken by mouth within one hour before chemotherapy, or within two hours before surgery. The injectable form is given by IV (into the vein) during surgery or before chemotherapy.

Common side effects of Anzemet include headache, diarrhea, tiredness, and dizziness.