Anti-nausea medication, such as Metoclopramide and Ondansetron, reduces nausea and vomiting that can accompany severe migraine. They are usually taken along with a pain reliever, as they do not reduce migraine pain on their own. They can help pain relievers more effectively if nausea and stomach upset interfere with your ability to take oral pain relievers.
You can learn more about anti-nausea medication for migraine treatment here.