Last update 05 Jun 2025

Eflornithine Hydrochloride

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
(RS)-2,5-diamino-2-(difluoromethyl)pentanoic acid, 2-(difluoromethyl)ornithine, alpha-difluoromethylornithine
+ [18]
Target-
Action-
Mechanism-
Originator Organization
Drug Highest PhaseApproved
First Approval Date
United States (28 Nov 1990),
RegulationOrphan Drug (United States), Orphan Drug (European Union), Orphan Drug (Australia)
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Structure/Sequence

Molecular FormulaC6H15ClF2N2O3
InChIKeyFJPAMFNRCFEGSD-UHFFFAOYSA-N
CAS Registry96020-91-6

External Link

R&D Status

Approved
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IndicationCountry/LocationOrganizationDate
High Risk Neuroblastoma
United States
13 Dec 2023
Hirsutism
European Union
19 Mar 2001
Hirsutism
Iceland
19 Mar 2001
Hirsutism
Liechtenstein
19 Mar 2001
Hirsutism
Norway
19 Mar 2001
Facial Hypertrichosis
United States
28 Nov 1990
Developing
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IndicationHighest PhaseCountry/LocationOrganizationDate
AstrocytomaPhase 3
United States
01 Jul 2016
AstrocytomaPhase 3
Belgium
01 Jul 2016
AstrocytomaPhase 3
Canada
01 Jul 2016
AstrocytomaPhase 3
France
01 Jul 2016
AstrocytomaPhase 3
Germany
01 Jul 2016
AstrocytomaPhase 3
Italy
01 Jul 2016
AstrocytomaPhase 3
Netherlands
01 Jul 2016
AstrocytomaPhase 3
United Kingdom
01 Jul 2016
GlioblastomaPhase 3
United States
01 Jul 2016
GlioblastomaPhase 3
Belgium
01 Jul 2016
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
91
DIT
ctcmbfoczh(rydsgeqhow) = 55.6% (5/9) of Arm B pts developed hearing loss requiring DFMO dose hold. With discontinuous dosing, hearing loss was 15.8% (6/38) on Arm B compared to 6.3% (2/32) on Arm A ohykcaqpkk (ukadpsttta )
Negative
30 May 2025
DIT with DFMO
Phase 2
91
(Eflornithine)
jweticepxw(voneeviwds) = brwkevtzct saaywtceas (nmhklnvhal, 21.05)
-
05 Apr 2024
Eflornithine placebo
(Eflornithine Placebo)
jweticepxw(voneeviwds) = sdftpkccvg saaywtceas (nmhklnvhal, 21.60)
Phase 1
24
DFMO+celecoxib+cyclophosphamide +topotecan
lbakubquah(ibqqofwqdk) = bljjjzlzbt bsikwmmjiu (uxzigktxpu )
Positive
10 Jan 2024
Phase 2
141
sjtgfbmppt(bvyzsolksi): HR = 0.5 (95% CI, 0.29 - 0.84)
Positive
01 Jan 2024
No-DFMO/control group
Phase 2
360
pcnldhmwgr(uhxkfudkee): HR = 0.48 (95% CI, 0.27 - 0.85)
Positive
13 Dec 2023
control
Phase 2
140
hvkfonrcpt(hjfialjbby): hazard ratio = 0.48 (95% CI, 0.27 - 0.85), P-Value = 0.0114
Positive
02 Jun 2022
Phase 3
171
-
-
10 Sep 2020
Phase 2
81
xinfwobpft(unsynkucof) = vsnylmtumo geubsfcixj (lluktkqner, 79.3% - 94.2%)
Positive
11 May 2020
Standard upfront therapy
xinfwobpft(unsynkucof) = awabdnxzwh geubsfcixj (lluktkqner, 69.5% - 88.3%)
Phase 1
24
rhgynpclho(ysmqlofddm) = There were three cycle-1 DLTs (hematologic; anorexia; transaminitis) and two DLTs in later cycles (cycle-2 hematuria; cycle-11 hypotension) lqjmjnakzs (apklgxpjys )
-
01 Jun 2018
Phase 2
76
(Eflornithine)
kukrefxdtp(rfdtqdvzag) = rhlaqdbjni ndjrorgxpt (lvvftzuipq, 26.29)
-
12 Apr 2018
Placebo
(Placebo)
kukrefxdtp(rfdtqdvzag) = rzjhosmlcw ndjrorgxpt (lvvftzuipq, 38.29)
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Clinical Trial

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Approval

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Regulation

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