Drugs / Cycloserine
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Cycloserine

Small molecule

Developed for
schizophrenia · post-traumatic stress disorder · major depressive disorder · obsessive-compulsive disorder · multidrug-resistant tuberculosis · panic disorder · bipolar depression · bipolar disorder
+41 more · cocaine dependence · social phobia · substance-related disorder · autism · eating disorder · nicotine dependence · phobic disorder · schizoaffective disorder · specific phobia · stroke disorder · Tourette syndrome · traumatic brain injury · agoraphobia · anxiety · anxiety disorder · atypical depressive disorder · borderline personality disorder · chronic pain syndrome · chronic prostatitis · chronic tic disorder · combat disorder · delusional disorder · depressive disorder · extensively drug-resistant tuberculosis · fibromyalgia · hereditary spastic paraplegia · mixed anxiety and depressive disorder · pulmonary tuberculosis · pyelonephritis · rifampicin-resistant tuberculosis · tuberculosis · alcohol dependence · alcohol-related disorders · autism spectrum disorder · body dysmorphic disorder · chronic obstructive pulmonary disease · persian gulf syndrome · post-treatment Lyme disease syndrome · sleep apnea syndrome · spinal cord injury · toxic polyneuropathy
Investigated by
National Institute of Mental Health (NIMH) · Massachusetts General Hospital · National Institute on Drug Abuse (NIDA) · University of Calgary · Boston University Charles River Campus · Mclean Hospital
+83 more · NeuroRx, Inc. · Emory University · University of Arkansas · University of California, Los Angeles · Hartford Hospital · Huashan Hospital · Beijing Chest Hospital · Indiana University · Johns Hopkins University · Medical University of South Carolina · National Alliance for Research on Schizophrenia and Depression · Northwestern University · Southern Methodist University · Target Health Inc. · US Department of Veterans Affairs · United States Department of Defense · University of Oxford · University of South Florida · VA Office of Research and Development · Washington University School of Medicine · Weill Medical College of Cornell University · Yale University · American Psychological Association (APA) · American Psychological Foundation · Boston University · CAMC Health System · Centre de Recherche de l'Institut Universitaire en santé Mentale de Montréal · Centre for the AIDS Programme of Research in South Africa · Charite University, Berlin, Germany · Christian Rück · Duke University · Foundation for a Smoke Free World INC · Georgia State University · German Federal Ministry of Education and Research · HOPE Therapeutics, Inc. · Hadassah Medical Organization · Haukeland University Hospital · Helse Vest · Herzog Hospital · James S McDonnell Foundation · Jasper A. Smits · Königska · Leiden University · Leiden University Medical Center · Medical Research Council · NYU Langone Health · Nathan Kline Institute for Psychiatric Research · National Institute of Allergy and Infectious Diseases (NIAID) · National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) · National Institute of General Medical Sciences (NIGMS) · National Institutes of Health (NIH) · Neurocare · New York State Psychiatric Institute · Obsessive Compulsive Foundation · Prevail Infoworks · Region Stockholm · Roger K. Pitman, MD · Rose Research Center, LLC · Rush University Medical Center · Sarah Herzog Hospital · Seoul National University Hospital · Sheba Medical Center · Tel Aviv University · Teva Pharmaceuticals USA · The Research Council of Norway · The Swedish Research Council · The University of New South Wales · The Zucker Hillside Hospital · Thomas J. Schnitzer · Uniformed Services University of the Health Sciences · United States Army Institute of Surgical Research · University of Alberta · University of Charleston · University of Florida · all 89 on the full record

Regulatory milestones approvals, filings & regulatory actions · 1 recorded

MilestoneJurisdictionBrandIndicationDateSentence it was read from
Approved US (FDA) SEROMYCIN — 1964-06-29 fda.gov ↗

Trials 100 · started per year

today
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PhaseRegistry idDatesIndicationSponsorStatusOutcome
Phase 08 trials · 2 missed
Phase 0 NCT07785102 Sep → Dec 2026 expected major depressive disorder Mclean Hospital Not yet recruiting No outcome recorded
Phase 0 NCT07560878 Mar 2026 → Dec 2030 expected major depressive disorder Mclean Hospital Recruiting No outcome recorded
Phase 0 NCT04357951 Apr 2023 → Mar 2024 Tourette syndrome Johns Hopkins University Withdrawn No outcome recorded Stop: Enrollment
Phase 0 NCT03780829 Feb 2020 → Feb 2026 — VA Office of Research and Development Terminated No outcome recorded Stop: Business
Phase 0 NCT02304432 Sep 2015 → Sep 2016 bipolar disorder, schizophrenia Mclean Hospital Completed No outcome recorded
Phase 0 NCT02066792 Apr 2014 → Jul 2018 social phobia Jasper A. Smits Completed Missed primary
Phase 0 NCT01944423 Oct 2013 → Oct 2018 nicotine dependence, panic disorder University of Texas at Austin Completed Missed primary
Phase 0 NCT02312635 Dec 2012 → Sep 2016 traumatic brain injury University of California, Los Angeles Unknown No outcome recorded
Phase 19 trials
Phase 1 NCT05731323 Oct 2022 → Jun 2023 major depressive disorder University of Calgary Completed No outcome recorded
Phase 1 NCT03511599 Sep 2018 → Dec 2020 major depressive disorder University of Calgary Completed No outcome recorded
Phase 1 NCT03432689 Aug → Nov 2018 — University of Calgary Completed No outcome recorded
Phase 1 NCT02099825 Jan 2014 → Oct 2022 anxiety disorder Washington University School of Medicine Terminated No outcome recorded
Phase 1 NCT02769936 Nov 2013 → Jul 2015 schizophrenia University of California, Los Angeles Completed No outcome recorded
Phase 1 NCT02128308 Nov → Dec 2013 — Seoul National University Hospital Completed No outcome recorded
Phase 1 NCT01068847 Feb 2010 → Oct 2012 drug dependence University of Arkansas Completed No outcome recorded
Phase 1 NCT00733239 Aug 2008 → Oct 2010 opiate dependence University of Arkansas Completed No outcome recorded
Phase 1 NCT00593463 Sep 2006 → May 2010 drug dependence University of Arkansas Completed No outcome recorded
Phase 1/23 trials
Phase 1/2 NCT07593222 Jul 2026 → Dec 2030 expected major depressive disorder Mclean Hospital Not yet recruiting No outcome recorded
Phase 1/2 NCT07460947 Jun 2026 → Jun 2027 expected borderline personality disorder Mclean Hospital Recruiting No outcome recorded
Phase 1/2 NCT01923896 Mar → Sep 2013 eating disorder, specific phobia Emory University Completed No outcome recorded
Phase 229 trials · 3 met primary · 2 missed
Phase 2 NCT07868627 Jun 2025 → Dec 2026 expected anxiety, depressive disorder Mclean Hospital Active not recruiting No outcome recorded
Phase 2 NCT06128213 Mar → Jun 2024 pyelonephritis NeuroRx, Inc. Unknown No outcome recorded
Phase 2 NCT06121284 Mar 2024 → Jul 2026 overdue mixed anxiety and depressive disorder University of Calgary Recruiting No outcome recorded
Phase 2 NCT05994703 Oct 2023 → Oct 2025 — Rose Research Center, LLC Completed No outcome recorded
Phase 2 NCT05395494 Aug 2022 → Jul 2025 fibromyalgia University of Calgary Terminated Missed primary
Phase 2 NCT05081986 Aug → Oct 2021 — University of Calgary Completed No outcome recorded
Phase 2 NCT04035603 Oct 2020 → Jan 2021 — Boston University Charles River Campus Withdrawn No outcome recorded Stop: Business
Phase 2 NCT03937596 Dec 2019 → Dec 2020 major depressive disorder University of Calgary Completed Met primary
Phase 2 NCT03535688 Mar 2018 → Feb 2024 — Northwestern University Terminated No outcome recorded Stop: Business
Phase 2 NCT02974010 Jan → Aug 2018 bipolar depression NeuroRx, Inc. Completed Met primary
Phase 2/36 trials · 2 missed
Phase 2/3 NCT07227103 Sep 2026 → Dec 2027 expected atypical depressive disorder NeuroRx, Inc. Not yet recruiting No outcome recorded
Phase 2/3 NCT03395392 May 2022 → Feb 2024 bipolar depression NeuroRx, Inc. Completed No outcome recorded
Phase 2/3 NCT03216356 Sep 2016 → Dec 2023 post-traumatic stress disorder Boston University Charles River Campus Withdrawn No outcome recorded
Phase 2/3 NCT00452231 Feb 2007 → Jul 2008 post-traumatic stress disorder University of Montreal Unknown No outcome recorded
Phase 2/3 NCT00356278 Sep 2006 → Jun 2014 post-traumatic stress disorder Emory University Completed Missed primary
Phase 2/3 NCT00222235 Jan 2000 → Jun 2004 schizoaffective disorder, schizophrenia University of Maryland, Baltimore Completed Missed primary
Phase 311 trials · 2 missed
Phase 3 NCT05081401 May 2022 → Dec 2026 expected extensively drug-resistant tuberculosis, multidrug-resistant tuberculosis, rifampicin-resistant tuberculosis Huashan Hospital Recruiting No outcome recorded
Phase 3 NCT03396068 Dec 2019 → Dec 2024 bipolar depression NeuroRx, Inc. Unknown No outcome recorded
Phase 3 NCT03416621 May 2018 → Feb 2020 nicotine dependence Duke University Completed No outcome recorded
Phase 3 NCT01680107 Oct 2012 → Oct 2017 panic disorder University of Oxford Terminated No outcome recorded
Phase 3 NCT01411774 Jun 2011 → Jun 2016 obsessive-compulsive disorder University of South Florida Completed No outcome recorded
Phase 3 NCT01102803 Apr 2010 → Jul 2011 phobic disorder Southern Methodist University Completed Missed primary
Phase 3 NCT01086475 Mar 2010 → Jan 2014 autism Indiana University Completed Mixed
Phase 3 NCT00515879 Dec 2007 → Dec 2011 social phobia Boston University Charles River Campus Completed No outcome recorded
Phase 3 NCT00198120 Feb 2004 → Sep 2007 autism Indiana University Completed No outcome recorded
Phase 3 NCT00000372 Mar 1998 → Nov 2005 schizophrenia Massachusetts General Hospital Withdrawn No outcome recorded
Phase 415 trials · 1 met primary · 4 missed
Phase 4 NCT07542548 Jul 2024 → Mar 2026 hereditary spastic paraplegia Massachusetts General Hospital Completed No outcome recorded
Phase 4 NCT03867136 Jun 2020 → Aug 2024 multidrug-resistant tuberculosis Huashan Hospital Completed No outcome recorded
Phase 4 NCT03830671 Mar 2019 → Jun 2022 multidrug-resistant tuberculosis Beijing Chest Hospital Completed No outcome recorded
Phase 4 NCT03237182 Jun 2017 → Dec 2022 multidrug-resistant tuberculosis Centre for the AIDS Programme of Research in South Africa Terminated No outcome recorded
Phase 4 NCT02772211 Jun → Dec 2016 — Sheba Medical Center Unknown No outcome recorded
Phase 4 NCT02656342 Nov 2015 → Sep 2018 obsessive-compulsive disorder Haukeland University Hospital Completed Missed primary
Phase 4 NCT01981759 Feb 2014 → May 2017 delusional disorder, schizoaffective disorder, schizophrenia NYU Langone Health Completed No outcome recorded
Phase 4 NCT02385266 Sep 2013 → May 2016 chronic prostatitis Northwestern University Terminated No outcome recorded Stop: Enrollment
Phase 4 NCT01833897 Mar 2013 → Jul 2014 bipolar disorder New York State Psychiatric Institute Completed No outcome recorded
Phase 4 NCT01649895 Aug 2012 → Jun 2016 obsessive-compulsive disorder Christian Rück Completed Missed primary
Phase not applicable18 trials · 1 met primary · 1 missed
— NCT04762836 Feb → Aug 2021 chronic pain syndrome Leiden University Medical Center Completed No outcome recorded
— NCT04717908 Jan 2021 → Jun 2024 multidrug-resistant tuberculosis Huashan Hospital Completed No outcome recorded
— NCT04545788 Aug 2020 → Dec 2022 tuberculosis Beijing Chest Hospital Unknown No outcome recorded
— NCT03961464 Aug → Dec 2018 — University of Oxford Completed No outcome recorded
— NCT02582515 Oct 2015 → Aug 2017 Tourette syndrome, chronic tic disorder University of California, Los Angeles Completed No outcome recorded
— NCT01996644 Feb 2013 → Feb 2014 eating disorder Washington University School of Medicine Completed Met primary
— NCT01450306 Jul 2010 → Dec 2011 specific phobia Hartford Hospital Completed No outcome recorded
— NCT01067846 Jun 2010 → Jan 2012 cocaine dependence University of Arkansas Completed No outcome recorded
— NCT00963924 Aug 2009 → May 2011 schizophrenia Massachusetts General Hospital Completed Mixed
— NCT01037101 Jul 2009 → Dec 2014 — CAMC Health System Unknown No outcome recorded
Phase not stated1 trial
— NCT05779267 — — NeuroRx, Inc. Available No outcome recorded
Comparator or background therapy35 trials
Phase 0 NCT02099240 Comparator Mar 2014 → Nov 2018 osteomyelitis University of Louisville Terminated No outcome recorded Stop: Enrollment
Phase 0 NCT01985750 Comparator Nov 2013 → Dec 2018 chronic obstructive pulmonary disease University of Oxford Unknown No outcome recorded
Phase 0 NCT00842309 Comparator Nov 2008 → Dec 2017 body dysmorphic disorder Massachusetts General Hospital Completed No outcome recorded
Phase 1 NCT02735694 Comparator Sep 2015 → Jun 2016 sleep apnea syndrome University of Manitoba Terminated No outcome recorded
Phase 1 NCT01062932 Comparator May 2009 → May 2010 nicotine dependence Baylor College of Medicine Completed No outcome recorded

Evidence & citations 19 cited values

Every value below carries the sentence it was read from. 145 sources stand behind the page.

FieldValueCited text
Known as Cycloserine “anti-bacterial tuberculosis drugs (pyrazinamide [PZA], ethambutol [EB, EMB], streptomycin [SM], kanamycin [KM, KAN], enviomycin [EVM], ethionamide [TH], cycloserine [CS],...” NCT02365623 ↗
27

“Experimental arms are seven oral regimens with a five-drug combination of the following: bedaquiline, linezolid, a fluoroquinolone (moxifloxacin or levofloxacin), cycloserine,...” NCT05081401 ↗

“This is a pilot study investigating if cycloserine (DCS; a learning enhancement medication) augments exposure therapy for food anxiety in patients with anorexia and bulimia nervosa.” NCT01996644 ↗

“The candidated drugs to be selected are:Cs-Cycloserine,Pto-Protionamide,Clr-Clarithromycin,PAS-sodium para-aminosalicylate,E-ethambutol,Bdq-Bedaquiline,Cfz-Clofazimine,Lzd-linezolid” NCT03830671 ↗

“D-cycloserine (seromycin) is a broad spectrum antibiotic, in use for over thirty years in the treatment of tuberculosis” NCT02772211 ↗

“D-Cycloserine: capsule, Cycloserine 250mg, single dose, King Pharmaceuticals Ltd” NCT03062150 ↗

“either cycloserine or para-aminosalicylic acid, with preference for cycloserine” NCT02975570 ↗

“Cycloserine 33-50kg 500 mg daily, 51-70kg 750 daily, \>70kg 1000 mg daily” NCT03604848 ↗

“Cycloserine: 500, 675, 750 mg oral capsule may possibly be given” NCT00733239 ↗

“Cycloserine: 500, 675, 750 mg oral capsules may possibly given.” NCT01068847 ↗

“Cycloserine ≤50kg 500 mg daily, \>50kg 750mg daily” NCT03867136 ↗

Show 17 more sources

Known as Cicloserina ChEMBL registry synonym — accepted as the source's own label CHEMBL771 ↗
Known as Cs-Cycloserine “The candidated drugs to be selected are:Cs-Cycloserine,Pto-Protionamide,Clr-Clarithromycin,PAS-sodium para-aminosalicylate,E-ethambutol,Bdq-Bedaquiline,Cfz-Clofazimine,Lzd-linezolid” NCT03830671 ↗
Known as CYC “The present study examined the impact of the N-type calcium channel blocker gabapentin (GBP) and the partial glycine agonist D-cycloserine (CYC) to attenuate the behavioral...” PMID 40272204 ↗ Apr 2025
Known as Cycloserine: Seromycin “Cycloserine: Seromycin” NCT01068847 ↗
Known as Cycloserinum ChEMBL registry synonym — accepted as the source's own label CHEMBL771 ↗
Known as D-Cyclocerine “D-Cyclocerine, a partial N-methyl-Daspartate (NMDA) receptor agonist, enhances extinction of learned fear among rats2” NCT01687140 ↗
Known as d-cycloserine “The present study examined the impact of the N-type calcium channel blocker gabapentin (GBP) and the partial glycine agonist D-cycloserine (CYC) to attenuate the behavioral...” PMID 40272204 ↗ Apr 2025
119

“An exciting recent finding from animal research is the ability of an established antibiotic (traditionally used to treat Tuberculosis), D-cycloserine (trade name: Seromycin) to...” NCT01687140 ↗

“D-Cycloserine is a glutamatergic N-methyl-d-aspartate receptor agonist that has been shown to facilitate the benefits of exposure therapy for anxiety disorders by enhancing the...” PMID 26132687 ↗ Jun 2015

“Arm 3)will include a combination of cognitive behavioral cessation counseling, enhanced cue exposure treatment (lab-based + interactive SMS texting) and a cognitive-enhancing...” NCT03416621 ↗

“d-Cycloserine (DCS) enhances extinction learning across species, but it has proven challenging to identify consistent benefit of DCS when added to therapeutic interventions.” PMID 28138381 ↗ Jan 2017

“Combat veterans with PTSD underwent 6 weeks of VR exposure therapy combined with either d-cycloserine (DCS), alprazolam (ALP), or placebo (PBO).” PMID 27183343 ↗ May 2016

“This study examines whether an antibiotic, d-cycloserine (DCS), boosts the effectiveness of cognitive behavior therapy (CBT) for social anxiety.” NCT00128401 ↗

“The purpose of this study is to test a drug called d-cycloserine to see if it can help people with a condition called social phobia.” NCT00633984 ↗

“NRX-101 is composed of D-cycloserine (DCS) an NMDA antagonist and lurasidone (5HT2a atypical antipsychotic and antidepressant).” NCT03395392 ↗

“This medicine - D-Cycloserine - is actually an antibiotic, currently FDA approved for the treatment of tuberculosis.” NCT02687165 ↗

“participants will randomly receive either 100mg of d-cycloserine (DCS, an antibiotic) or a placebo capsule” NCT03511599 ↗

Show 109 more sources

Known as D-cycloserine, DCS “D-cycloserine, DCS” NCT02066792 ↗
1

“d-cycloserine; DCS” NCT01944423 ↗

Known as D-Cyloserine “Our neurophysiological data and clinical data in depression suggests that we can enhance the effects of TMS by using an adjunctive medication called D-Cyloserine (DCS, 100mg)...” NCT05177601 ↗
Known as DCS “The two medications are (1) d-cycloserine (DCS), a medication that is an agonist (facilitator) of the NMDA glutamatergic receptor and has been shown in previous studies to...” NCT02099825 ↗
47

“This is a single site, open-label, feasibility study of cognitive behavioral therapy with exposure and response prevention (CBT/ERP) adding the augmentation of D-cycloserine...” NCT01172873 ↗

“NeuroRx is developing NRX-101, a fixed-dose combination oral capsule composed of D-cycloserine (DCS) and lurasidone for the maintenance of remission from Severe Bipolar...” NCT03396068 ↗

“D-Cycloserine (DCS) is a partial NMDA receptor agonist that has been shown to enhance therapeutic response to exposure-based treatments for anxiety disorders, but has not been...” PMID 22694905 ↗ Jun 2012

“The investigators hope to boost the clinical response to smoking cue exposure therapy in quitters on NRT (nicotine replacement therapy) pretreatment by pharmacological...” NCT01907594 ↗

“Our neurophysiological data and clinical data in depression suggests that we can enhance the effects of TMS by using an adjunctive medication called D-Cyloserine (DCS, 100mg)...” NCT05177601 ↗

“This is a pilot study investigating if cycloserine (DCS; a learning enhancement medication) augments exposure therapy for food anxiety in patients with anorexia and bulimia nervosa.” NCT01996644 ↗

“D-cycloserine (DCS): A medication originally developed as an antibiotic that, at lower doses, helps brain cells form new connections and learn more effectively (neuroplasticity).” NCT07868627 ↗

“We have shown that targeting the NMDA receptor with low doses of the partial agonist, D-cycloserine (DCS), normalizes long-term motor cortex plasticity in individuals with MDD.” NCT07227103 ↗

“d-Cycloserine (DCS) enhances extinction learning across species, but it has proven challenging to identify consistent benefit of DCS when added to therapeutic interventions.” PMID 28138381 ↗ Jan 2017

“This pilot study aims evaluate the feasibility and initial efficacy of behavior therapy augmented by d-cycloserine (DCS) compared to behavior therapy augmented by placebo.” NCT04357951 ↗

Show 37 more sources

Known as NSC-154851 ChEMBL registry synonym — accepted as the source's own label CHEMBL771 ↗
Known as NSC-76029 ChEMBL registry synonym — accepted as the source's own label CHEMBL771 ↗
Known as Orientomycin ChEMBL registry synonym — accepted as the source's own label CHEMBL771 ↗
Known as Seromycin “An exciting recent finding from animal research is the ability of an established antibiotic (traditionally used to treat Tuberculosis), D-cycloserine (trade name: Seromycin) to...” NCT01687140 ↗
8

“One group of participants will receive the medication cycloserine (seromycin) and one group will receive a placebo drug (like a sugar pill).” NCT00632632 ↗

“D-cycloserine (seromycin) is a broad spectrum antibiotic, in use for over thirty years in the treatment of tuberculosis” NCT02772211 ↗

“Subjects will receive 250 mg of Seromycin or D-cycloserine (DCS) prior to computerized cognitive behavioral therapy.” NCT01067846 ↗

“D-cycloserine (DCS , Seromycin) is a broad spectrum antibiotic, in use for over thirty years against tuberculosis” NCT00408031 ↗

“Daily oral D-cycloserine 100mg during TMS treatments (20 days). Other Names: Seromycin” NCT05395494 ↗

“Drug Trade Name--Seromycin, (D-cycloserine)” NCT02312635 ↗

NCT00182000 ↗

NCT02933684 ↗

Known as Seromycin (d-cycloserine) “Seromycin (d-cycloserine)” NCT02304432 ↗
Action Activate “enhancing NMDA receptor function by systemic treatment with D-cycloserine” NCT00000371 ↗
Modality Small molecule — CHEMBL771 ↗
Route Oral “50 mg/daily by mouth” NCT00000371 ↗