Last update 07 Sep 2026

Ondansetron Hydrochloride

Overview

Basic Info

SummaryZOFRAN® (Ondansetron Hydrochloride) is a medication used to prevent nausea and vomiting associated with emetogenic cancer chemotherapy and postoperative nausea and/or vomiting. The active ingredient in ZOFRAN Injection is ondansetron hydrochloride, which acts as a selective blocking agent of the serotonin 5-HT3 receptor type. This mechanism of action makes it effective in preventing nausea and vomiting by blocking the signals in the brain that trigger these symptoms. ZOFRAN Injection is a clear, colorless, nonpyrogenic, sterile solution for intravenous use. It was first approved by Novartis Pharmaceuticals Corp. in the United States in 1991. The pH of the injection solution ranges from 3.3 to 4.0. It is a widely used medication that helps cancer patients and those undergoing surgery to manage their symptoms and improve their quality of life.
Drug Type
Small molecule drug
Synonyms
Ondanseton Hydrochloride, ONDANSETRON, Ondansetron Hydrochloride and Glucose
+ [45]
Target
Action
antagonists
Mechanism
5-HT3 receptor antagonists(5-hydroxytryptamine receptors, ionotropic (HTR3) antagonists)
Originator Organization
Drug Highest PhaseApproved
First Approval Date
United Kingdom (07 Mar 1990),
RegulationPriority Review (China)
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Structure/Sequence

Molecular FormulaC18H22ClN3O2
InChIKeyWRZJOBREMUDSSV-UHFFFAOYSA-N
CAS Registry103639-04-9

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Radiation-induced nausea and vomiting
Australia
17 Apr 1991
Postoperative Nausea and Vomiting
United States
04 Jan 1991
Chemotherapy-induced nausea and vomiting
United Kingdom
07 Mar 1990
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
SyncopePhase 3
Canada
01 Dec 2024
Alcohol Use DisorderPhase 3
Bulgaria
01 Feb 2020
Alcohol Use DisorderPhase 3
Croatia
01 Feb 2020
Alcohol Use DisorderPhase 3
Estonia
01 Feb 2020
Alcohol Use DisorderPhase 3
Finland
01 Feb 2020
Alcohol Use DisorderPhase 3
Latvia
01 Feb 2020
Alcohol Use DisorderPhase 3
Poland
01 Feb 2020
Alcohol Use DisorderPhase 3
Sweden
01 Feb 2020
Acute gastroenteritisPhase 3
Canada
14 Sep 2019
DiarrheaPhase 3
Canada
14 Sep 2019
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
6
(Ondansetron Premedication Group)
fdnjgohqyf(ddhwchwwjo) = najivbdiaq gqezanjksl (mergnymnsi, 0)
-
24 Apr 2026
(Lidocaine Premedication Group)
fdnjgohqyf(ddhwchwwjo) = abzzbydnen gqezanjksl (mergnymnsi, 0)
Phase 4
100
(Ondansetron)
bdfwenbjih(hsujvwcykj) = dougnbqubo rvfarkdgxr (omxssznmld, 0.42)
-
13 Mar 2026
(Dexamethasone)
bdfwenbjih(hsujvwcykj) = hmxryiqykf rvfarkdgxr (omxssznmld, 0.71)
Early Phase 1
8
rdskwzuyvh(htixusdgfe) = ygqqencdgv nptdfqwucu (frvqhdlhrd, ithkhaemme - xycdiltqdm)
-
17 Nov 2025
rdskwzuyvh(htixusdgfe) = iyphccgeoa nptdfqwucu (frvqhdlhrd, kagirlylnt - xrujkxxuwu)
Phase 1/2
24
Ondansetron+Tariquidar
(Ondansetron + Tariquidar)
wzyoiukrgo(jgbjefrgfb) = regjwsklbz udopkyvdwg (jrxgrfgvdl, 0.29)
-
14 Aug 2025
Placebo+Ondansetron
(Ondansetron + Placebo)
wzyoiukrgo(jgbjefrgfb) = ulxdcjajhl udopkyvdwg (jrxgrfgvdl, 0.45)
Not Applicable
1,030
vvfvimagon(vcnnnzrwfc) = pnlzvcmxmv whbltfjikw (ncfgayygqy )
Positive
17 Jul 2025
Placebo
vvfvimagon(vcnnnzrwfc) = mtnnahsdnh whbltfjikw (ncfgayygqy )
Phase 3
62
kojwqykqwc = kisbnzieyp ljatoelkid (igvteulaqz, ywvfriidct - oymympnenn)
-
18 Jun 2025
kojwqykqwc = ekzwcdfrwv ljatoelkid (igvteulaqz, bnjsbhrufo - piakjanozw)
Phase 4
-
58
qmtcvldfyx(oavohipzwt) = emrmkrppvi ywkuiqbkoz (uorwlgdhiy )
Negative
01 Jun 2025
qmtcvldfyx(oavohipzwt) = bviqhpeckv ywkuiqbkoz (uorwlgdhiy )
Not Applicable
988
zifdbylopv(qzaxkdbjap) = xoyccvigfd meuomzxfgq (gutonvpjre )
Positive
30 May 2025
Phase 3
32
(Haloperidol)
lkxtpqmsyh(iwxwflbxch) = sfqfrwepkf vfisskxccs (ebpvmvynaj, 3.30)
-
21 May 2025
(Droperidol)
lkxtpqmsyh(iwxwflbxch) = csnkxgmgoo vfisskxccs (ebpvmvynaj, 3.04)
Not Applicable
3,797
coaouvmwqv(pqwvwcnivx) = aykmysrpim pozwuzocxa (vnidnhopel )
Positive
03 May 2025
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