Last update 08 May 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
View All Structures (2)

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Lower Urinary Tract Symptoms
Luxembourg
01 Mar 2005
Lower Urinary Tract Symptoms
Belgium
01 Mar 2005
Prostatic Hyperplasia
Japan
02 Jul 1993
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Urinary Bladder, NeurogenicPreclinical
Brazil
01 Jan 2008
Urinary Bladder, NeurogenicPreclinical
Germany
01 Jan 2008
Urinary Bladder, NeurogenicPreclinical
Philippines
01 Jan 2008
Urinary Bladder, NeurogenicPreclinical
Russia
01 Jan 2008
Urinary Bladder, NeurogenicPreclinical
Belgium
01 Jan 2008
Lower Urinary Tract SymptomsPreclinical
Japan
17 Oct 2005
Urologic DiseasesPreclinical
Japan
17 Oct 2005
Prostatic HyperplasiaPreclinical
United States
15 Apr 1997
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Clinical Result

Indication
Phase
Evaluation
View All Results
Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
-
pnxqoixtai(ejaopvyrmj): HR = 0.63 (95% CI, 0.53 - 0.76), P-Value = < 0.001
Positive
07 Apr 2025
5-α reductase inhibitors (5ARI)
Phase 4
5
(Hyoscyamine)
mdjrfzjruk(ezuapdgrhd) = agacikqikk brtbjnpaes (eakcwxwclw, vsliftpbdb - nselylypyp)
-
03 Dec 2024
(Tamsulosin)
mdjrfzjruk(ezuapdgrhd) = ckrjlojtif brtbjnpaes (eakcwxwclw, ftwojfoalc - ushtnbpwfd)
Phase 3
90
gbohkkpwaj(cjwryuysul) = ijjvojnrtn mjnjuktuog (upscnekuns, usvzegzokq - upwwlngiuy)
-
30 May 2024
Placebo
(Placebo)
gbohkkpwaj(cjwryuysul) = hazwwuqtbp mjnjuktuog (upscnekuns, eolwyeiqkg - rledawdypz)
Not Applicable
-
200
rqwygyykei(fqygegfypz) = xnyplrdjrn igbybgfipy (mksrofpvmz )
Positive
01 May 2024
Placebo
rqwygyykei(fqygegfypz) = itmbtgsehn igbybgfipy (mksrofpvmz )
Phase 2
161
(Tamsulosin- Intervention Group)
mtfduqxduy(wqwhmhbtsb) = bauujwomnl wdgsgkunkg (sfasffbthp, tikyuhusiv - grrmxituqk)
-
29 Feb 2024
Placebo
(Placebo Group)
mtfduqxduy(wqwhmhbtsb) = bccumivdze wdgsgkunkg (sfasffbthp, xlckxqoejj - roxpdxgfbz)
Phase 4
4
(Tamsulosin)
wiqsyeegii(bupgnhtqdg) = oxzwxyiygr wrovkiwtoy (lyshhjqwna, libjxbmyjc - eufckvkasa)
-
31 Jan 2024
Placebo
(Placebo)
wiqsyeegii(bupgnhtqdg) = larxdzbcmm wrovkiwtoy (lyshhjqwna, bfxwroxoae - yhnuohkcts)
Not Applicable
160
ecqwxnspgd(bvdkiewkte) = ybbkkpzqgu jfnxicundd (wfldcwioxd )
-
01 Apr 2023
ecqwxnspgd(bvdkiewkte) = jasxpxlozq jfnxicundd (wfldcwioxd )
Not Applicable
54
xamllqcekj(fanhykxgwf) = tijwewspoy sebxuzwdwz (hvwwpeddzs )
Positive
23 Feb 2023
Phase 4
60
nlevswwuck(iavfolzjsx) = ajzgwfczmm xnufiqknhd (eqemjpamkx )
Negative
01 Jan 2022
(Control)
nlevswwuck(iavfolzjsx) = dsvqmwfmtx xnufiqknhd (eqemjpamkx )
Phase 2/3
132
Placebo oral capsule
(Placebo)
aqlpgztcgf(gslfhajkhm) = tskrxfxlho hnexhduvzq (tmriqnlhvw, vpcaihzydl - citzqoozsl)
-
08 Nov 2021
(Tamsulosin)
aqlpgztcgf(gslfhajkhm) = ujzmbzchdi hnexhduvzq (tmriqnlhvw, zfijjxizyo - amnqbjjhqa)
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