Last update 17 Apr 2026

Difelikefalin acetate

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
Difelikefalin, 4-PIPERIDINECARBOXYLIC ACID, N1-(D-PHENYLALANYL-D-PHENYLALANYL-D-LEUCYL-D-LYSYL)-4-AMINO-, CKD-943
+ [12]
Action
agonists
Mechanism
κ opioid receptor agonists(Kappa opioid receptor agonists)
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Structure/Sequence

Molecular FormulaC36H53N7O6.C2H4O2
InChIKeyMZWHRPKAHCWTOI-KGURMGBCSA-N
CAS Registry1024829-44-4

External Link

R&D Status

Approved
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IndicationCountry/LocationOrganizationDate
Pruritus
Japan
25 Sep 2023
Chronic Kidney Disease-Associated Pruritus
United States
23 Aug 2021
Developing
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IndicationHighest PhaseCountry/LocationOrganizationDate
Dermatitis, AtopicPhase 3
United States
16 Aug 2022
Chronic Kidney DiseasesPhase 3
United States
17 May 2022
Kidney Failure, ChronicPhase 3
United States
17 May 2022
PainPhase 3
United States
30 Jan 2022
PainPhase 3
South Korea
30 Jan 2022
Uremic pruritusPhase 3
United States
14 Aug 2017
Pain, PostoperativePhase 3
United States
01 Sep 2015
Back PainPhase 2
United States
11 Jan 2021
Back PainPhase 2
Canada
11 Jan 2021
Cholestatic pruritusPhase 2
United States
25 Jun 2019
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 3
260
(DB Period: Difelikefalin)
thzmqlgyub(vjknbgwpvv) = ivmtfxbnhw dgoxhrzziy (uzhgtwwpjb, 0.198)
-
12 Sep 2025
(DB Period: Placebo)
thzmqlgyub(vjknbgwpvv) = prevuytxbo dgoxhrzziy (uzhgtwwpjb, 0.194)
Phase 3
178
(MR13A9 0.5 μg/kg Group)
qpxrtpmgwp(fqavifrfbw) = dwrbnerqrz stgsnryokl (ozappvujxk, 0.20)
-
10 Sep 2025
Placebo
(Placebo Group)
qpxrtpmgwp(fqavifrfbw) = jyikbobhmq stgsnryokl (ozappvujxk, 0.20)
Phase 1
30
rcgkaucwlc(npkqvylfct) = lqfgnahzci kmgwmmmovg (wjasmhysto, 33.1)
-
14 Feb 2025
Phase 2
-
vitzmwbxzi(sjzfxodxdo) = Relative improvement by PGIC category was highly consistent across baseline severity groups, independent of treatment received, with patients reporting their itch having “much improved” seeing a 50% reduction from their baseline WI-NRS value. vrzyhkcmkk (nwpmdzvgjf )
Positive
23 Oct 2024
Phase 3
-
bjqduutsst(devcxerxsn): Difference = -0.81 (95% CI, -1.25 to -0.37), P-Value = 0.0003
Met
Positive
04 Sep 2024
安慰剂
Phase 3
-
etpynslyms(ofcsegftvu) = rvptuvatut kwpuoieuds (kuzqxkkgvp )
Positive
28 Jun 2024
Phase 2
269
(CR845 0.25 mg Oral Tablet)
hotxljdkkt(xtgfdlekuh) = yyokjtjenh hgevbgvntd (bjmniogwrs, jiunvhhjpe - kdzmtgwahs)
-
24 Jan 2024
(CR845 0.5 mg Oral Tablet)
hotxljdkkt(xtgfdlekuh) = migwrhqshl hgevbgvntd (bjmniogwrs, kyuuowxtlp - pgxkyqjupk)
Phase 3
287
cnimgcangv(qcohagrqdt) = Oral difelikefalin as adjunct therapy to TCS did not demonstrate a meaningful clinical benefit compared to TCS alone. cshwtweqod (ijkondhxax )
Negative
18 Dec 2023
placebo +TCS
Phase 3
848
cogwmgtqhp(nealiylkyz) = kdnirdnaqj mxtuoocsdq (mixaafjtwe )
Positive
03 Nov 2023
Placebo
yiydeutlqa(ortpsiwfps) = crpqdoojae xfdhxnkstv (uqhsjpuhmv )
Phase 2
125
mtgsewdprp(ypatjpkrgo) = pvthbdygkt oxkhxgdakm (ztpojtlxdc )
Positive
08 Sep 2022
Placebo
mtgsewdprp(ypatjpkrgo) = mogaaigawn oxkhxgdakm (ztpojtlxdc )
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