Emend (generic: aprepitant) is a prescription medication used to prevent nausea and vomiting caused by certain cancer treatments or surgery in adults. Emend belongs to a group of drugs called neurokinin 1 (NK1) antagonists, which block a natural substance called neurokinin from causing nausea and vomiting.
This medication comes in capsule and injectable forms. Emend is taken as 3 doses over 3 days - starting on the day you have chemotherapy, and the two days after chemotherapy.
Common side effects of Emend include constipation, nausea, and tiredness.