Last update 02 Mar 2026

Pacritinib

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
ENPAXIQ, Epjevy, Pacritinib (USAN/INN)
+ [6]
Action
inhibitors, antagonists
Mechanism
ALK2 inhibitors(Activin receptor type-1 inhibitors), CSF-1R antagonists(Colony stimulating factor 1 receptor antagonists), FLT3 inhibitors(Tyrosine-protein kinase receptor FLT3 inhibitors)
Originator Organization
Inactive Organization
Drug Highest PhaseApproved
First Approval Date
United States (28 Feb 2022),
RegulationFast Track (United States), Accelerated Approval (United States), Orphan Drug (United States), Priority Review (United States)
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Structure/Sequence

Molecular FormulaC28H32N4O3
InChIKeyHWXVIOGONBBTBY-ONEGZZNKSA-N
CAS Registry937272-79-2

External Link

KEGGWikiATCDrug Bank
D11768Pacritinib-

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Primary Myelofibrosis
United States
28 Feb 2022
Thrombocytopenia
United States
28 Feb 2022
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Polycythemia VeraPhase 3
Belgium
03 Dec 2012
Post-essential thrombocythemia myelofibrosisPhase 3
Belgium
03 Dec 2012
Post-polycythemia vera myelofibrosisPhase 3
Belgium
03 Dec 2012
Thrombocythemia, EssentialPhase 3
Belgium
03 Dec 2012
Waldenstrom's macroglobulinaemia refractoryPhase 2
United States
21 Nov 2025
VEXAS syndromePhase 2
United States
28 May 2025
VEXAS syndromePhase 2
Japan
28 May 2025
VEXAS syndromePhase 2
Canada
28 May 2025
VEXAS syndromePhase 2
France
28 May 2025
VEXAS syndromePhase 2
Germany
28 May 2025
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
169
mgkukcnwit(ravvvxmakk) = rmcdqflcks wcfltfmytu (ndrjafoeuo, 0.0 - 1.0)
Positive
06 Dec 2025
Phase 2
66
qphxxhhceq(ofayxzanxc) = trpbmpjlli xqccsqmyyb (cjcmohczab )
Positive
06 Dec 2025
znsshuvkgz(pbiatlwtfz) = dxknyhkkak mjiwukdtxx (ffhmlvdxir )
Not Applicable
236
dmljewxmhq(qsyuqniosc) = The proportion of PAC vs MOM-treated pts discontinuing therapy at 3, 6, and 12 mo was 26% vs 17%, 52% vs 29%, and 70% vs 42%, respectively. ibxsutcbcc (udgnaarfrt )
Positive
06 Dec 2025
Phase 3
114
eodwbrxjbv(zvvwgluzxy) = zpemmmdphe zbzhohftkc (pbywwcsrpb, 86.1 - NE)
Positive
06 Dec 2025
Best Available Therapy (BAT)
eodwbrxjbv(zvvwgluzxy) = gymmxihkeu zbzhohftkc (pbywwcsrpb, 43.6 - NE)
Not Applicable
169
brmwnmdccp(whbgsquroq) = owslbwsgny mnhdlswiuh (wjqphhwfdk, 8.1 - 9.8)
Positive
06 Dec 2025
Not Applicable
Myelofibrosis
First line | Second line
212
kbkufxjybi(lpvruqpltw) = fpaicyrwzi fxrczrdldn (jcwhtzfoyi, 61.5 - 75.3)
Positive
30 May 2025
Phase 3
-
hjnmuwwngq(itzjoheurg) = evcpnbyxpi rpwdmrbjfc (tfxarejgjh )
Positive
30 May 2025
Best Available Therapy (BAT)
hjnmuwwngq(itzjoheurg) = uktvqinbvs rpwdmrbjfc (tfxarejgjh )
Not Applicable
148
rotdjiudcw(fjdmqhkdmr) = yftxaqofrz tbtwlndzzl (qyiirzrzca, 27 - 84)
Positive
30 May 2025
Not Applicable
179
srgfrjpzsi(vlrwiqnkap) = pkcsktszgd fhsdbcvssk (bxnyvwoath, 6.9 - 7.6)
Positive
14 May 2025
Not Applicable
35
miaizzdukw(tlhspjukjb) = dnyaxxvyfe iqeciqucqs (imdaawkntw, -1.1% - 12.5%)
-
14 May 2025
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Clinical Trial

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Approval

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Regulation

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