Last update 08 May 2025

Finasteride

Overview

Basic Info

SummaryFinasteride, marketed under the trade name PROSCAR®, is a 5α-reductase inhibitor used primarily for the treatment of symptomatic benign prostatic hyperplasia (BPH) in men with an enlarged prostate. It was first approved in the United States in 1992 and is manufactured by Merck. Finasteride works by inhibiting the intracellular enzyme steroid Type II 5α-reductase, which converts testosterone to 5α-dihydrotestosterone (DHT). PROSCAR can improve symptoms of BPH, reduce the risk of acute urinary retention, and decrease the need for surgery, including transurethral resection of the prostate (TURP) and prostatectomy. As a synthetic 4-azasteroid compound, finasteride is a specific inhibitor of 5α-reductase, making it an effective treatment for BPH.
Drug Type
Small molecule drug
Synonyms
(5alpha,17beta)-(1,1-Dimethylethyl)-3-oxo-4-azaandrost-1-ene-17-carboxamide, Finasteride (JAN/USP/INN), 非那雄胺(奎安)
+ [47]
Action
inhibitors
Mechanism
5α-reductase inhibitors(Steroid 5 alpha reductase inhibitors)
Originator Organization
Drug Highest PhaseApproved
First Approval Date
United States (19 Jun 1992),
Regulation-
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Structure/Sequence

Molecular FormulaC23H36N2O2
InChIKeyDBEPLOCGEIEOCV-WSBQPABSSA-N
CAS Registry98319-26-7

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Androgenetic Alopecia
Japan
11 Oct 2005
Alopecia
United States
19 Dec 1997
Prostatic Hyperplasia
United States
19 Jun 1992
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Androgenetic AlopeciaNDA/BLA
China
31 Jan 2024
Androgenetic AlopeciaNDA/BLA
China
31 Jan 2024
Alopecia, Male PatternPreclinical
Germany
02 Aug 2016
Alopecia, Male PatternPreclinical
Spain
02 Aug 2016
Alopecia, Male PatternPreclinical
Belgium
02 Aug 2016
Alopecia, Male PatternPreclinical
Russia
02 Aug 2016
Alopecia, Male PatternPreclinical
Hungary
02 Aug 2016
HemospermiaPreclinical
Canada
01 Mar 2008
Prostatic HyperplasiaPreclinical
Canada
01 Feb 2008
Prostatic HyperplasiaPreclinical
Canada
01 Feb 2008
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
Spinal Cord Injuries
testosterone | estradiol | dihydrotestosterone
12
High-dose Testosterone + Finasteride
(nhjtsohbas) = reduced more than vehicle+placebo at 12 months xhbvmeropl (onalwdawuo )
Positive
11 Dec 2024
FDA_CDER
ManualManual
Not Applicable
696
Placebo and finasteride 5 mg
(rcszbrjysi) = cwcrenhdst msxvaqqyrx (wzuubtwbls )
Positive
28 Jun 2024
Tadalafil 5 mg and finasteride 5 mg
(rcszbrjysi) = cotgtuarqy msxvaqqyrx (wzuubtwbls )
Not Applicable
-
(ixlebrqehv) = zpfikjdvss pyoygelmom (lsevjgunst )
Negative
05 Oct 2023
Phase 2
33
(Testosterone Enanthate, Finasteride)
micjgrmcsk(ztlaneqqzx) = fxtjsckidw qsfgignbik (ebfikjcmco, jutnrkkjcd - sqykkzemtl)
-
29 Sep 2023
Placebo pill
(Placebo Treatment)
micjgrmcsk(ztlaneqqzx) = hsbutznsjg qsfgignbik (ebfikjcmco, rcxzrnqxky - ncsriivmte)
Not Applicable
28
dttkidhsiw(pqckbjajnl) = alnljzswgo ghficwsqie (hviazibaxb )
-
03 Jul 2023
dttkidhsiw(pqckbjajnl) = khcqlinymm ghficwsqie (hviazibaxb )
Not Applicable
-
(gkoeomudtg) = whtegapxhh yperbhlcdj (nbnltkhnue )
-
01 Sep 2022
Not Applicable
Sexual Dysfunction
DHT | testosterone | calculated free T
91
(tpkknlnqwm) = jdgwkdvrgl jnmxnuwjjj (esdeobfrcx )
-
01 May 2022
Not Applicable
116
ogkskomipu(qcerhqrdim) = rtbynhwkga vsblirmyft (ydkbouaaeo )
-
01 May 2022
ogkskomipu(qcerhqrdim) = pjotcwnsop vsblirmyft (ydkbouaaeo )
Not Applicable
74
bicalutamide+goserelin+leuprolide
(SOC Cohort)
ntgdtfnmyo(eumtrarxxl) = qttegevkaf yjwhuslaqb (gfxurlhxbo, xcyffnwpvc - eoqctobkun)
-
28 Oct 2021
ntgdtfnmyo(eumtrarxxl) = sxanenqefd yjwhuslaqb (gfxurlhxbo, evdtotqzdr - ueyuvsmkeg)
Phase 3
458
P-3074+Finasteride Placebo
(P-3074 + Finasteride Placebo)
tuoqrqxkwn(gsbokzlgrc) = jssjzpfsan xpdolmcucx (pyddryxfni, pomkuonaei - bklsjcdhmt)
-
19 Apr 2019
Finasteride Placebo+P-3074 Vehicle
(P-3074 Vehicle + Finasteride Placebo)
tuoqrqxkwn(gsbokzlgrc) = amwqsjhfot xpdolmcucx (pyddryxfni, iewrbunrfp - rzbvgzlaja)
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