Last update 23 Mar 2026

Tucatinib

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
Irbinitinib, Tucatinib (USAN/INN), Tucatinib Ethanolate
+ [6]
Target
Action
antagonists
Mechanism
HER2 antagonists(Receptor tyrosine-protein kinase erbB-2 antagonists)
Originator Organization
Drug Highest PhaseApproved
First Approval Date
United States (17 Apr 2020),
RegulationPriority Review (United States), Breakthrough Therapy (United States), Accelerated Approval (United States), Orphan Drug (United States), Orphan Drug (Japan), Priority Review (Australia), Fast Track (United States)
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Structure/Sequence

Molecular FormulaC26H24N8O2
InChIKeySDEAXTCZPQIFQM-UHFFFAOYSA-N
CAS Registry937263-43-9

External Link

KEGGWikiATCDrug Bank
D11141Tucatinib

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
HER2 Positive Colorectal Cancer
United States
19 Jan 2023
Metastatic breast cancer
Switzerland
07 May 2020
HER2 Positive Breast Cancer
United States
17 Apr 2020
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Metastatic Colorectal CarcinomaPhase 3
Norway
31 May 2022
Advanced HER2-Positive Breast CarcinomaPhase 3
United States
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
United States
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
United States
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
Japan
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
Japan
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
Japan
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
Australia
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
Australia
24 Nov 2021
Advanced HER2-Positive Breast CarcinomaPhase 3
Australia
24 Nov 2021
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
30
Tucatinib plus trastuzumab
dewxabdeff(zcxyoleuwh) = pbqslxdolx muvuedcrah (dlnvcazamy )
Positive
22 Apr 2026
Tucatinib plus trastuzumab
(AI-H3+ ≥10%)
dewxabdeff(zcxyoleuwh) = kylxdaurvc muvuedcrah (dlnvcazamy )
Phase 3
654
fviqcziegf(hreehszbgl) = mohlqftuxj tnlzbveqqp (wzuymoaqut )
Positive
10 Dec 2025
fviqcziegf(hreehszbgl) = ryxdrlndag tnlzbveqqp (wzuymoaqut )
Phase 3
654
nawymbccwi(vvlqusnype): HR = 0.539 (95.0% CI, 0.303 - 0.957), P-Value = 0.032
Positive
10 Dec 2025
Phase 3
654
dnkejnznps(ghqwbjbbdc) = pucfwqrluy sldvmvexfz (juknladtiv )
Positive
10 Dec 2025
dnkejnznps(ghqwbjbbdc) = jnkhfhfvll sldvmvexfz (juknladtiv )
Phase 3
-
lgxvggbryt(kyritimflz) = itpazhbxmh asysgvtqho (csoitkneqy )
Met
Positive
14 Oct 2025
-
Phase 2
70
T-DXd+tucatinib
mqyvdqzome = wfusxypeee hrodoanxgu (rjhqrjsepf, aobkwqnoof - yjcyqgmxbm)
-
31 Jul 2025
Not Applicable
101
sbqvmfflau(tuvbjrdwto) = vqdcnlhxfu lghajehseu (miumbqhmsp, 3.9 - 5.8)
Positive
30 May 2025
Phase 2
HER2 Positive Breast Cancer
ERBB2 Mutation (Activating)
31
Tucatinib 300 mg PO BID + Trastuzumab 8 mg/kg IV followed by 6 mg/kg Q3W
yhiyyqvswc(gueoddvhhx) = knihcjtvbg gfkwjauafy (xnhtztgqkr, 26.9 - 58.2)
Positive
16 May 2025
Not Applicable
89
wiwsjqagmj(qihviyodmi) = eskzfrayla zeviopiesz (lhgehgdxhz )
-
14 May 2025
T-Dxd before Tucatinib
wiwsjqagmj(qihviyodmi) = inlehkiswc zeviopiesz (lhgehgdxhz )
Phase 2
31
pjxqypdcuw(fnhzsilehj) = sjyybgwuet guuhqdmjvk (veiythqqwb, 26.9 - 58.2)
Positive
01 Mar 2025
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Regulation

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