What does antiemetic mean?
An antiemetic is any drug or agent that prevents or relieves nausea and vomiting. The word derives from Greek roots: 'anti-' meaning against, combined with 'emetic', from 'emetikos', relating to vomiting (emesis). Antiemetics occupy a central place in modern medicine, most prominently in supportive cancer care, where they control the severe nausea triggered by chemotherapy, but they are also used for motion sickness, pregnancy-related morning sickness, postoperative recovery, and gastrointestinal illness. Common classes include serotonin receptor antagonists such as ondansetron, dopamine antagonists, antihistamines like meclizine, and older remedies such as ginger, sometimes described as a natural antiemetic. In everyday usage the term appears both as a noun, naming the drug itself, and as an adjective describing a substance's effect. Clinical in register, it is familiar to patients and healthcare workers alike, and its importance is hard to overstate: effective antiemetic therapy transformed chemotherapy from an ordeal many dreaded into a far more tolerable experience.
A drug that prevents or relieves nausea and vomiting.
"The doctor prescribed an antiemetic to manage the side effects of the treatment."
Often used generically to refer to the whole class of anti-nausea medications.
Having the effect of preventing or alleviating nausea and vomiting.
"The compound showed marked antiemetic activity in clinical trials."
As a countable class of drugs, the plural 'antiemetics' is standard when referring to multiple agents or types.
"Several classes of antiemetics are available for managing chemotherapy-induced nausea."
Without modern antiemetics, chemotherapy would be unbearable for many patients — these quiet workhorses of medicine are a big reason cancer treatment became survivable rather than just endurable.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of antiemetic
The word antiemetic combines the Greek-derived prefix 'anti-', meaning 'against', with 'emetic', which traces to Greek 'emetikos', meaning 'causing vomiting', itself rooted in 'emein' ('to vomit'). The underlying noun 'emesis' entered medical Latin and then English as the clinical name for vomiting. Antiemetic emerged as a medical term in the late nineteenth and early twentieth centuries as pharmacology developed dedicated anti-nausea agents, and it became widespread with the introduction of modern anti-nausea drugs in the later twentieth century.
How antiemetic is actually used
Antiemetic is primarily a medical and clinical term, common in hospital settings, pharmacology, and patient information leaflets. It is used both as a noun (naming the class of drug) and as an adjective (describing a substance's effect), so context determines which reading applies. It carries no strong connotation beyond its clinical neutrality.
Easily confused with antiemetic
An antibiotic fights bacterial infections, whereas an antiemetic prevents or treats nausea and vomiting.