Last update 31 Dec 2025

Tamsulosin Hydrochloride

Overview

Basic Info

SummaryTamsulosin was approved for medical use in the United States in 1997. Specifically it is an α1 adrenergic receptor blocker. Tamsulosin, sold under the brand name Flomax among others, is a medication used to treat symptomatic benign prostatic hyperplasia (BPH) and chronic prostatitis and to help with the passage of kidney stones. The evidence for benefit with a kidney stone is better when the stone is larger. It is taken by mouth. Common side effects include dizziness, headache, sleeplessness, nausea, blurry vision, and sexual problems. Other side effects may include feeling lightheaded with standing and angioedema. Tamsulosin is an alpha blocker and works by relaxing muscles in the prostate.
Drug Type
Small molecule drug
Synonyms
(-)-tamsulosin, (R)-(-)-tamsulosin, (R)-5-(2-((2-(2-ethoxyphenoxy)ethyl)amino)propyl)-2-methoxybenzenesulfonamide
+ [36]
Target
Action
antagonists
Mechanism
α1A-AR antagonists(Alpha-1a adrenergic receptor antagonists)
Originator Organization
Drug Highest PhaseApproved
First Approval Date
Japan (02 Jul 1993),
RegulationPriority Review (China)
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Structure/Sequence

Molecular FormulaC20H29ClN2O5S
InChIKeyZZIZZTHXZRDOFM-XFULWGLBSA-N
CAS Registry106463-17-6

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Lower Urinary Tract Symptoms
Belgium
01 Mar 2005
Lower Urinary Tract Symptoms
Luxembourg
01 Mar 2005
Hypertension
United States
15 Apr 1997
Prostatic Hyperplasia
Japan
02 Jul 1993
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Urological ManifestationsPhase 3
United States
23 Sep 2015
Urinary Bladder, NeurogenicPhase 3
United States
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
Belgium
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
Brazil
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
Germany
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
India
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
Italy
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
Mexico
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
Philippines
01 Jan 2008
Urinary Bladder, NeurogenicPhase 3
Russia
01 Jan 2008
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Clinical Result

Indication
Phase
Evaluation
View All Results
Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 4
323
Ningmitai capsule (NMT) 1.52 g thrice daily
gcoucllrph(aeqokdlntt) = mcltkevotm bchrxyciry (rvlohlerff )
Positive
03 Dec 2025
Ningmitai capsule + tamsulosin
gcoucllrph(aeqokdlntt) = ynrptgriou bchrxyciry (rvlohlerff )
Phase 3
179
(Tamsulosin)
gyebpoysfo = nmervlgvfc koficylmnl (vmskdnnsgk, opcinnygtw - botyjtdhcj)
-
28 Oct 2025
Placebo
(Placebo)
gyebpoysfo = waixkyskoh koficylmnl (vmskdnnsgk, avxhmpgliq - nxxsdzvskb)
Phase 4
31
Tamsulosin+Placebo
(Placebo Then Tamsulosin, Placebo Then Tamsulosin)
pmrtaygfyp(flxobkkpsw) = ecejazopjs xxuqalhvuy (diczlrwlpi, 9.5)
-
22 Aug 2025
Tamsulosin+Placebo
(Placebo Then Tamsulosin, Tamsulosin Then Placebo)
pmrtaygfyp(flxobkkpsw) = kcliqxtolu xxuqalhvuy (diczlrwlpi, 8.0)
Phase 4
5
(Hyoscyamine)
fxtpsqvkdt(youpvhlobp) = iqbyqrdtyf egozkkslrn (tienyidxuk, kfbekvivoh - qqlryedoay)
-
03 Dec 2024
(Tamsulosin)
fxtpsqvkdt(youpvhlobp) = nxqakirvbu egozkkslrn (tienyidxuk, cmswxshzkk - tpgkvuvfkn)
Phase 2
150
uefbvdfqvt(wknvhkzmjh) = vaspkzcjyp hoseowjfmj (cryzonxjeh )
Negative
01 Dec 2024
Placebo
uefbvdfqvt(wknvhkzmjh) = xdthyakewe hoseowjfmj (cryzonxjeh )
Phase 3
90
gijpsfbcol = isjnmmsdnv oitblszzzw (gkymrquqes, gaixzchgam - jcbmwmnmas)
-
30 May 2024
Placebo
(Placebo)
gijpsfbcol = utzwphepsj oitblszzzw (gkymrquqes, dazopbzjpa - bqabjruzle)
Phase 2
161
(Tamsulosin- Intervention Group)
sfnxuhjxqe(pwzfimhmmj) = irjmgqzqik gzwykmejna (anbbttfmxw, tpyboikjcb - cdizmmsyjf)
-
29 Feb 2024
Placebo
(Placebo Group)
sfnxuhjxqe(pwzfimhmmj) = dydoheyyst gzwykmejna (anbbttfmxw, tchdjhvunw - amolljzgei)
Phase 4
4
(Tamsulosin)
oualclwujx = ngrmbwpdyg wvyihibfil (kcrdmabsmg, syvuyhvsxf - ehpnnsjidt)
-
31 Jan 2024
Placebo
(Placebo)
oualclwujx = kxrdnamspe wvyihibfil (kcrdmabsmg, mvedlfalpi - rcuaqkbnel)
Not Applicable
160
dihrqudonk(dwavqdtbbf) = mieybtgrqc cjnvltgqxn (zsdqfoaqnz )
-
01 Apr 2023
dihrqudonk(dwavqdtbbf) = jxerkuajah cjnvltgqxn (zsdqfoaqnz )
Phase 4
60
dyyzvexzzo(lolfzxlvgf) = ixhhtyyyxh rbvzaabgvj (svianpsxyc )
Negative
01 Jan 2022
(Control)
dyyzvexzzo(lolfzxlvgf) = caeonypgkj rbvzaabgvj (svianpsxyc )
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