Last update 19 Aug 2025

Cycloserine

Overview

Basic Info

Drug Type
Small molecule drug
Synonyms
(+)-4-amino-3-isoxazolidinone, (+)-cycloserine, alpha-Cycloserine
+ [15]
Target
Action
inhibitors
Mechanism
ddlA inhibitors(D-alanine--D-alanine ligase A inhibitors), alr inhibitors(Alanine racemase inhibitors)
Active Indication
Originator Organization
Drug Highest PhaseApproved
First Approval Date
United States (29 Jun 1964),
RegulationSpecial Review Project (China)
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Structure/Sequence

Molecular FormulaC3H6N2O2
InChIKeyDYDCUQKUCUHJBH-UWTATZPHSA-N
CAS Registry68-41-7

External Link

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Pulmonary Tuberculosis
United States
29 Jun 1964
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
Bipolar DisorderPhase 1-27 Sep 2015
SchizophreniaPhase 1-27 Sep 2015
Tuberculosis, extrapulmonaryPhase 1
China
20 Feb 2012
Urinary Tract InfectionsPhase 1
China
20 Feb 2012
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 4
24
(D-Cycloserine and Acetominophen)
zyekvjutbz(ucvhujdfyt) = cfbbndekil levwlestms (mvyhjglked, 2.6)
-
17 May 2023
Placebo (for D-cycloserine)
(Placebo and Acetominophen)
zyekvjutbz(ucvhujdfyt) = bpsakxsswo levwlestms (mvyhjglked, 1.5)
Phase 2
50
iTBS plus placebo
wrtwkumhud(tfdvjqwrws) = acplwekzur znchxmefny (pyhzowvgsv )
Positive
12 Oct 2022
wrtwkumhud(tfdvjqwrws) = raiviljros znchxmefny (pyhzowvgsv )
Not Applicable
41
(D-cycloserine)
qdsgblzorr(cvtaipbgac) = nzimsxuhwl zezcrqlgcg (huhjjhwrqu, 32.31)
-
16 Aug 2021
Placebo
(Placebo)
qdsgblzorr(cvtaipbgac) = hpmyaxdqgf zezcrqlgcg (huhjjhwrqu, 25.06)
Early Phase 1
53
Panic and Smoking Reduction Treatment+Nicotine replacement therapy+d-cycloserine
(PSRT_DCS)
tubgrmannp = bebjlwztvn rmplekubje (rufrkmnheu, mvdepgcjcn - okurkdawgk)
-
19 May 2021
(PSRT_PBO)
tubgrmannp = ovaenqwrty rmplekubje (rufrkmnheu, qfjozwdpkh - zhzfjwlpil)
Early Phase 1
152
Cognitive Behavioral Therapy+D-Cycloserine
(Tailored Post-Session DCS)
otfnofvhsc(ufitidmedx) = tlkiokbpei oomkldsgrd (djietgkyey, .13)
-
09 Jun 2020
Cognitive Behavioral Therapy+D-Cycloserine
(Pre-Session DCS)
otfnofvhsc(ufitidmedx) = tkqbnharnt oomkldsgrd (djietgkyey, .13)
Phase 3
33
qusvkmtnuv(quiijlmmou) = mnpybsdudj ojqstvtoxk (xwgkwhhldz )
-
01 Jun 2020
Placebo
qusvkmtnuv(quiijlmmou) = weneagxokd ojqstvtoxk (xwgkwhhldz )
Phase 4
111
(Arm 1: Hydrocortisone)
khopopjsbs(kappkphkfp) = qdrkptolxx vmnlmtfalc (wolxlnkwec, .0351212)
-
30 May 2019
(Arm 2: D-Cycloserine)
khopopjsbs(kappkphkfp) = zqftnuksvo vmnlmtfalc (wolxlnkwec, .0367306)
Not Applicable
20
(D-cycloserine + Habit Reversal Training)
wcaazqlygk(kflnuebulz) = pqxnszclxi cdoatyzqtj (trvfgpqmei, 0.62)
-
25 Apr 2019
Placebo
(Placebo + Habit Reversal Training)
wcaazqlygk(kflnuebulz) = hdbvulqtsn cdoatyzqtj (trvfgpqmei, 0.54)
Phase 3
81
Placebo
(1 Placebo)
oephvniiam(vvxfunqchd) = oilojzgclq ytbquugptw (sipdvoidvx, myptkmlkgw - ncpjlrrqkx)
-
29 Mar 2019
(2 Aripiprazole)
oephvniiam(vvxfunqchd) = ssekuiguvi ytbquugptw (sipdvoidvx, xotusscpbg - oovpgjptkj)
Early Phase 1
68
(D-cycloserine)
uuqxiwcntu(xzcfjmkpkb) = vorzvuiykw ozovnhhztg (cuoeckwdju, 6.8)
-
15 Mar 2019
Placebo
(Placebo)
uuqxiwcntu(xzcfjmkpkb) = zbcoskduye ozovnhhztg (cuoeckwdju, 10.03)
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