different between chemotherapy vs ondansetron

English

chemo- +? therapy

chemotherapy (countable and uncountable, plural chemotherapies)

(medicine) Any chemical treatment intended to be therapeutic with respect to a disease state.
(oncology, most common usage) chemical treatment to kill or halt the replication and/or spread of cancerous cells in a patient.

Probably from ond- (of unknown origin) +? se(ro)t(onin) r(eceptor) an(tag)on(ist).

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

(Received Pronunciation) IPA^(key): /?n?dæn.s?.t??n/
(General American) IPA^(key): /?n?dæn.s??t??n/, /?n?d?n.s??t??n/, /o?n?d?n.s??t??n/

ondansetron (uncountable)

(pharmacology) A carbazole derivative (trademark Zofran), C₁₈H₁₉N₃O, that is a serotonin receptor antagonist administered by injection and by mouth to relieve nausea and vomiting, especially during cancer therapy.

“ondansetron”, in Lexico, Dictionary.com; Oxford University Press, 2019–present.
“ondansetron”, in Merriam–Webster Online Dictionary, (Please provide a date or year).

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