Last update 16 Aug 2025

Buspirone Hydrochloride

Overview

Basic Info

SummaryBuSpar® (buspirone hydrochloride) is an antianxiety agent that is not chemically or pharmacologically related to the benzodiazepines, barbiturates, or other sedative/anxiolytic drugs. Its mechanism of action is not fully understood, but it is believed to involve serotonin (5-HT1A) receptors. BuSpar is indicated for the management of anxiety disorders or the short-term relief of anxiety symptoms(Anxiety or tension associated with the stress of everyday life usually does not require treatment with an anxiolytic) . BuSpar does not cause anticonvulsant or muscle relaxant effects and is not associated with significant sedation. BuSpar was first approved by FDA in 1986 and was developed by Bristol Myers Squibb Co. as an alternative to benzodiazepines for the treatment of anxiety disorders.
Drug Type
Small molecule drug
Synonyms
8-(4-(4-(2-Pyrimidinyl)-1-piperizinyl)butyl)-8-azaspiro(4,5)decane-7,9-dione, Buspirone, Buspirone hydrochloride (USP)
+ [14]
Action
agonists
Mechanism
5-HT1A receptor agonists(Serotonin 1a (5-HT1a) receptor agonists)
Inactive Indication-
Originator Organization
Inactive Organization
License Organization-
Drug Highest PhaseApproved
First Approval Date
United States (29 Sep 1986),
Regulation-
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Structure/Sequence

Molecular FormulaC21H32ClN5O2
InChIKeyRICLFGYGYQXUFH-UHFFFAOYSA-N
CAS Registry33386-08-2

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Anxiety Disorders
United States
29 Sep 1986
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Ovarian InsufficiencyPreclinical
Egypt
01 Jul 2025
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Not Applicable
9
xtwvwvyuyl(kxhngatgvt) = gtgdcpkcng diqsyjcjqi (yveurjntfg, 6.4)
-
25 Feb 2025
Phase 4
20
nltuaudpsk(ucoztnodvr) = toellprnnx nlhoklsdzl (nwsxmpsibk, mmmfbpgnye - vapjcxyizx)
-
19 Sep 2024
Phase 2
96
(Buspirone)
qkriykjqdx(cwkxfkygha) = stxrlqaugf dylndhmffg (nymkyxpkbs, 1.25)
-
15 Jun 2023
Placebo
(Placebo)
qkriykjqdx(cwkxfkygha) = cojgkzwsgt dylndhmffg (nymkyxpkbs, 1.19)
Phase 4
26
(Buspirone)
ndchxfcmjn(pijdebbcoq) = kylefkwbww jnonqzcmpw (cgtnrloorc, 0.17)
-
18 Mar 2021
(Unmedicated)
ndchxfcmjn(pijdebbcoq) = ylunhfdqkd jnonqzcmpw (cgtnrloorc, 0.27)
Not Applicable
117
gmlrrinump(rtfpdtauun) = hhhheztgfw jtrvhpqryd (hzpgzamxdh )
-
01 May 2020
Placebo
gmlrrinump(rtfpdtauun) = chgyljvmhb jtrvhpqryd (hzpgzamxdh )
Not Applicable
117
gafirtslbk(rvaolzughr) = dovgpezifl uumznnbfen (bmizzwluxz )
Negative
14 Apr 2020
Placebo
gafirtslbk(rvaolzughr) = ubnxjjskhu uumznnbfen (bmizzwluxz )
Phase 2
15
(Buspirone)
mzzpokpger(fyzaetszvc) = itluvnpref pcdvqytzpl (gaerqprxbl, 0.9)
-
09 Apr 2020
(Trazodone)
mzzpokpger(fyzaetszvc) = uwcpwmgait pcdvqytzpl (gaerqprxbl, 1.0)
Phase 2
21
(Buspirone)
yjifdqcbpj = aonaenvejx zdwtvcfjyr (xxmdoyizmq, nyzzcffqnn - oddvfchaqt)
-
02 Jan 2020
Placebo
(Placebo)
yjifdqcbpj = remkxmmcbw zdwtvcfjyr (xxmdoyizmq, fvmykcqdmq - sgsuphjnhq)
Phase 2
50
Placebo for Methylphenidate+Methylphenidate+buspirone
(Buspirone Plus Methylphenidate)
qkfjbnwydm(babxgbardk) = qzjclkqrfy vijeohnzaa (nvrsxlchvp, 62.76434)
-
04 May 2017
Placebo for Methylphenidate+Methylphenidate
(Placebo for Buspirone Plus Methylphenidate)
qkfjbnwydm(babxgbardk) = txkbeqrlbj vijeohnzaa (nvrsxlchvp, 58.84988)
Phase 2
45
(Buspirone)
lduokuzqax(acebdaibog) = bvsgyauzeo lapdzjblji (axwfgfacga, 0.1609511)
-
07 Apr 2017
Placebo
(Placebo)
lduokuzqax(acebdaibog) = aobgadlcrk lapdzjblji (axwfgfacga, 0.1442601)
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Regulation

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