An antiemetic is a drug that is effective against vomiting and nausea. Antiemetics are typically used to treat motion sickness and the side effects of some opioid analgesics and chemotherapy directed against cancer.

Antiemetics include:

• Dopamine antagonists
  • Domperidone
  • Haloperidol, Chlorpromazine
  • metoclopramide
• Antihistamines
  • Cyclizine
  • Diphenhydramine
  • Dimenhydrinate
• 5-Hydroxytryptamine antagonists
  • dolasetron
  • granisetron
  • ondansetron
• Cannabinoids
  • Marijuana
  • Marinol

See also: emetic.