list of investigational antidepressants

    List of investigational antidepressants GudangMovies21 Rebahinxxi LK21

    This is a list of investigational antidepressants, or drugs that are currently under development for clinical use in the treatment of depression but are not yet approved. Specific indications include major depressive disorder, treatment-resistant depression, dysthymia, bipolar depression, and postpartum depression, among others.
    Chemical/generic names are listed first, with developmental code names, synonyms, and brand names in parentheses.
    This list was last comprehensively updated in August 2024. It is likely to become outdated with time.


    Under development




    = Preregistration

    =
    Buprenorphine/samidorphan (ALKS-5461) – μ-opioid receptor partial agonist, κ-opioid receptor antagonist, δ-opioid receptor antagonist, and μ-opioid receptor antagonist combination – New Drug Application (NDA) rejected in 2019, no updates since 2021


    = Phase 3

    =
    Aticaprant (AVTX-501; CERC-501; JNJ-3964; JNJ-67953964; LY-2456302) – κ-opioid receptor antagonist
    CYB003 (CYB-003; deuterated psilocybin analogue) – serotonin 5-HT2A receptor agonist and psychedelic hallucinogen
    Cycloserine/lurasidone (Cyclurad; NRX-101) – ionotropic glutamate NMDA receptor glycine site partial agonist and atypical antipsychotic (non-selective monoamine receptor modulator) combination
    Esmethadone (dextromethadone; REL-1017) – ionotropic glutamate NMDA receptor antagonist and other actions
    Ketamine (HTX-100; NRX-100) – ionotropic glutamate NMDA receptor antagonist
    Navacaprant (BTRX-140; BTRX-335140; CYM-53093; NMRA-140; NMRA-335140) – κ-opioid receptor antagonist
    Pimavanserin (ACP-103; BVF-048; Nuplazid) – serotonin 5-HT2A receptor antagonist or inverse agonist
    Psilocybin (COMP-360) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    Seltorexant (JNJ-42847922; JNJ-7922; MIN-202) – orexin OX2 receptor antagonist
    SEP-4199 (non-racemic amisulpride; aramisulpride/esamisulpride [85:15 ratio]) – atypical antipsychotic (dopamine D2 and D3 receptor antagonist and serotonin 5-HT2B and 5-HT7 receptor antagonist)
    SNG-12 (Synapsinae) – glycine transporter 1 (GlyT1) inhibitor
    Solriamfetol (Sunosi; JZP-110; SKLN05; ARL-N05; YKP-10A; R-228060; ADX-N05) – norepinephrine and dopamine reuptake inhibitor and trace amine-associated receptor 1 (TAAR1) agonist
    Ulotaront (SEP-363856; SEP-856) – serotonin 5-HT1A receptor agonist and trace amine-associated receptor 1 (TAAR1) agonist


    = Phase 2/3

    =
    PRAX-114 – extrasynaptic GABAA receptor-preferring positive allosteric modulator and neurosteroid


    = Phase 2

    =
    4-Chlorokynurenine (4-CL-KYN; AV-101) – ionotropic glutamate NMDA receptor glycine site antagonist and kynurenine modulator
    Ademetionine (MSI-190; MSI-195; S-Adenosyl-L-Methionine; Sam-E; SAMe; Strada) – cofactor in monoamine neurotransmitter biosynthesis
    ALTO-100 (NSI-189) – unknown mechanism of action (hippocampal neurogenesis stimulant and indirect brain-derived neurotrophic factor (BDNF) modulator)
    ALTO-203 – histamine H3 receptor agonist
    Apimostinel (AGN-241660; GATE-202; NRX-1074) – ionotropic glutamate NMDA receptor glycine site partial agonist
    Arketamine ((R)-ketamine; PCN-101) – ionotropic glutamate NMDA receptor antagonist
    Azetukalner (1OP-2198; Encukalner; VRX-621698; XEN-1101; XPF-008) – KCNQ potassium channel agonist
    BHV-7000 (BPN-25203; KB-3061) – KCNQ2 potassium channel stimulant
    BI-1358894 – transient receptor potential cation TRPC4 and TRPC5 channel inhibitor
    Blixeprodil (GM-1020; (R)-4-fluorodeschloroketamine ((R)-4-FDCK) – ionotropic glutamate NMDA receptor antagonist
    Bretisilocin (GM-2505; 5F-MET; 5-fluoro-N-methyl-N-ethyltryptamine) – serotonin 5-HT2A and 5-HT2C receptor agonist, serotonin 5-HT2B receptor antagonist, psychedelic hallucinogen, and serotonin releasing agent
    Brezivaptan (ANC-501; THY-1773; TS-1211; TS-121) – vasopressin V1b receptor antagonist
    Centanafadine (CTN; EB-1020) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    Deudextromethorphan/quinidine (AVP-786; CTP-786; d-DM/Q; d6-DM/Q; deuterated dextromethorphan/ultra-low-dose quinidine) – sigma σ1 receptor agonist, serotonin reuptake inhibitor, ionotropic glutamate NMDA receptor antagonist, other actions, and CYP2D6 inhibitor combination
    Dimethyltryptamine (N,N-Dimethyltryptamine; DMT; N,N-DMT; BMND-01; BMND-02; BMND-03) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    Emestedastat (UE-2343; Xanamem) – 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) inhibitor (glucocorticoid synthesis inhibitor)
    Esketamine (CLE-100) – ionotropic glutamate NMDA receptor antagonist
    FKB-01MD (FKB01MD; TGBA-01AD; TGBA01AD) – serotonin reuptake inhibitor, serotonin 5-HT1A receptor agonist, serotonin 5-HT1D receptor modulator, and serotonin 5-HT2 receptor agonist
    Itruvone (PH-10; PH-10A; PH10-NS) – chemoreceptor cell stimulant, vomeropherine, and neurosteroid
    JNJ-54175446 (JNJ-5446) – purinergic P2X7 receptor antagonist
    JNJ-55308942 – purinergic P2X7 receptor antagonist
    Ketamine (extended-release; R-107; R107) – ionotropic glutamate NMDA receptor antagonist
    Ketamine (intranasal; Ereska; PMI-100; PMI-150; SLS-002; TUR-002) – ionotropic glutamate NMDA receptor antagonist
    Ketamine (prolonged-release oral; KET-01) – ionotropic glutamate NMDA receptor antagonist
    Liafensine (BMS-820836; DB-104) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    Lisdexamfetamine (Vyvanse) – norepinephrine and dopamine releasing agent
    Lysergic acid diethylamide (LSD; MB-22001) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    Mebufotenin (5-MeO-DMT; 5-Methoxy-N,N-Dimethyltryptamine; BPL-002; BPL-003) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    Mifepristone (Mifeprex; RU-38486; RU-486) – progesterone receptor antagonist, glucocorticoid receptor antagonist, and androgen receptor antagonist
    NBI-1070770 – NR2B subunit-containing ionotropic glutamate NMDA receptor negative allosteric modulator
    NORA-520 (brexanolone prodrug) – GABAA receptor positive allosteric modulator and neurosteroid
    Onabotulinum toxin A (BoNTA; Botox; Botulinum toxin A injectable; GSK-1358820; OnabotA X; onabotulinumtoxinA X; Vistabel; Vistabex) – acetylcholine release inhibitor and neuromuscular blocking agent
    Onfasprodil (CAD-9271; MIJ-821; MIJ821) – NR2B subunit-containing ionotropic glutamate NMDA receptor negative allosteric modulator
    OPC-64005 – serotonin, norepinephrine, and dopamine reuptake inhibitor
    Osavampator (TAK-653; NBI-1065845; NBI-845) – ionotropic glutamate AMPA receptor positive allosteric modulator
    OSU-6162 (PNU-9639; PNU-96391; PNU-96391A) – serotonin 5-HT2A receptor partial agonist (non-hallucinogenic), dopamine D2 receptor partial agonist, and sigma σ1 receptor ligand (so-called "monoaminergic stabilizer")
    PDC-1421 (ABV-1504; ABV-1505; ABV-1601; BLI-1005) – norepinephrine reuptake inhibitor
    Pegipanermin (DN-TNF; INB-03; LIVNate; Quellor; XENP-1595; XENP-345; XPro-1595; XPro595; XPro) – tumor necrosis factor α (TNFα) inhibitor
    Pramipexole (CTC-413; CTC-501) – dopamine D2, D3, and D4 receptor agonist
    Pregnenolone methyl ether (3β-methoxypregnenolone; MAP-4343) – microtubule-associated protein (MAP) stimulant and tubulin polymerization promoter
    Ralmitaront (RG-7906; RO-6889450) – trace amine-associated receptor 1 (TAAR1) agonist
    RE-104 (FT-104; 4-HO-DiPT/iprocin prodrug) – serotonin 5-HT2A receptor agonist and psychedelic hallucinogen
    Rislenemdaz (AVTX-301; CERC-301; MK-0657) – NR2B subunit-containing ionotropic glutamate NMDA receptor negative allosteric modulator
    Ropanicant (SUVN-911) – α4β2 nicotinic acetylcholine receptor antagonist
    SP-624 – sirtuin 6 (SIRT6) stimulant
    SPN-820 (NV-5138; SPN-821) – sestrin2 modulator and mammalian target of rapamycin complex 1 (mTORC1) stimulant
    Tebideutorexant (JNJ-61393215; JNJ-3215) – orexin OX1 receptor antagonist
    Tildacerfont (SPR-001; LY-2371712) – corticotropin releasing factor receptor 1 (CRF1) antagonist
    Tramadol (controlled-release; ETS-6103; ETX-6103; Viotra) – μ-opioid receptor agonist, serotonin and norepinephrine reuptake inhibitor, serotonin 5-HT2C receptor antagonist, and other actions
    TS-161 – metabotropic glutamate mGlu2 and mGlu3 receptor antagonist
    Zelquistinel (AGN-241751; GATE-251) – ionotropic glutamate NMDA receptor partial positive allosteric modulator


    = Phase 1/2

    =
    PT-00114 (PT100114) – corticotropin releasing hormone (CRH) inhibitor


    = Phase 1

    =
    ABX-002 (LL-340001 prodrug) – thyroid hormone receptor β (TRβ) agonist
    Agomelatine (ALTO-300; agomelatine 25 mg formulation) – serotonin 5-HT2C receptor antagonist and melatonin MT1 and MT2 receptor agonist
    BI-1569912 – NR2B subunit-containing ionotropic glutamate NMDA receptor negative allosteric modulator
    BMND07 (BMND-07; dimethyltryptamine or 5-MeO-DMT combination drug) – non-selective serotonin receptor agonist, serotonergic hallucinogen, and other actions combination
    BRII-296 (extended-release injectable aqueous suspension formulation of brexanolone) – GABAA receptor positive allosteric modulator and neurosteroid
    Brilaroxazine (RP-5000; RP-5063) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Carbidopa/oxitriptan (EVX-101) – serotonin precursor (5-hydroxytryptophan; 5-HTP) and aromatic L-amino acid decarboxylase (AAAD) inhibitor combination
    Crisdesalazine (AAD-2004) – microsomal prostaglandin E2 synthase-1 (mPGES-1) inhibitor
    DGX-001 – gut–brain axis modulator
    Dimethyltryptamine (N,N-dimethyltryptamine; DMT; N,N-DMT; VLS-01) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    DSP-3456 – metabotropic glutamate mGlu2 and mGlu3 receptor negative allosteric modulator
    Ebselen (DR-3305; Harmokisane; PZ-51; SPI-1005; SPI-3005) – multiple mechanisms of action
    Icalcaprant (CVL-354) – κ-opioid receptor antagonist
    KAR-2618 (GFB-887) – transient receptor potential cation TRPC4 and TRPC5 channel inhibitor
    PIPE-307 – muscarinic acetylcholine M1 receptor antagonist
    SAL-0114 – undefined mechanism of action
    Scopolamine (DPI-385-CVS; DPI-386; DPI-386 Nasal Gel; DPI-386-SG; DPI-386-SS; DPI-387; DPI-521-CG; DPI-550-TBI; INSCOP spray) – non-selective muscarinic acetylcholine receptor antagonist
    Traneurocin (NA-831; Cycloprolylglycine; CPG) – unknown or undefined / ionotropic glutamate AMPA receptor positive allosteric modulator, GABAA receptor positive allosteric modulator, and racetam-like drug
    XW-10508 (oral esketamine conjugate prodrug) – ionotropic glutamate NMDA receptor antagonist
    Zalsupindole (DLX-001; DLX-1; AAZ; AAZ-A-154) – non-hallucinogenic serotonin 5-HT2A receptor agonist


    = Preclinical

    =
    2-Bromo-LSD (bromolysergide; BETR-001, TD-0148A) – non-hallucinogenic serotonin 5-HT2A receptor agonist and other actions
    ACD856 (ACD-856) – tropomyosin receptor kinase TrkA, TrkB, and TrkC positive allosteric modulator
    AKO-003 (ketamine-based psychedelic formulation; ketamine/specific plant bioactive) – ionotropic glutamate NMDA receptor antagonist, dissociative hallucinogen, and "specific plant bioactive" combination
    ALTO-202 – NR2B subunit-containing ionotropic glutamate NMDA receptor antagonist
    Brexpiprazole (long-acting injectable; MTD-211) – atypical antipsychotic (non-selective monoamine receptor modulator)
    CB-03 (CB-04; CB-003; CB03-154) – KCNQ2 and KCNQ3 potassium channel stimulant
    CRHR1 antagonist therapeutic (HMNC Brain Health) – corticotropin releasing factor receptor 1 (CRF1) antagonist
    Duloxetine (oral suspension) – serotonin and norepinephrine reuptake inhibitor
    EB-003 – non-hallucinogenic serotonin receptor agonist and psychoplastogen
    EGX-A – serotonin 5-HT2A receptor agonist and psychedelic hallucinogen
    EGX-B – serotonin 5-HT2A receptor agonist and psychedelic hallucinogen
    ENX-104 – presynaptic dopamine D2 and D3 autoreceptor antagonist (at low doses)
    ENX-105 – dopamine D2 and D3 receptor antagonist and serotonin 5-HT1A and 5-HT2A receptor agonist (non-hallucinogenic)
    Etifoxine deuterated (GRX-917) – GABAA receptor positive allosteric modulator and translocator protein (TSPO; peripheral benzodiazepine receptor) agonist (neurosteroidogenesis stimulant)
    GABA positive allosteric modulator (CS Bay Therapeutics) – GABAA receptor positive allosteric modulator
    INV-88 – macrophage migration inhibitory factor (MIF) inhibitor
    ITI-333 – serotonin 5-HT2A receptor antagonist, μ-opioid receptor biased partial agonist, α1A-adrenergic receptor antagonist, and dopamine D1 receptor antagonist
    ITI-1549 – non-hallucinogenic serotonin 5-HT2A receptor agonist and serotonin 5-HT2B receptor antagonist
    Ketamine (depot; ALA-3000) – ionotropic glutamate NMDA receptor antagonist
    Lithium cocrystal (AL-001; LiProSal; lithium salicylate L-proline ionic cocrystal) – unknown mechanism of action and mood stabilizer (improved formulation of lithium)
    LPH-5 – selective serotonin 5-HT2A receptor partial agonist and psychedelic hallucinogen
    LPCN-1154 (LPCN1154; oral brexanolone) – GABAA receptor positive allosteric modulator and neurosteroid
    Lucid-PSYCH (Lucid-201) – undefined mechanism of action and psychedelic hallucinogen
    Mebufotenin (5-MeO-DMT; 5-methoxy-N,N-dimethyltryptamine; LSR-1019) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    Midomafetamine (microneedle transdermal patch; 3,4-methylenedioxymethamphetamine; MDMA) – serotonin, norepinephrine, and dopamine releasing agent and weak serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptor agonist (entactogen and weak psychedelic hallucinogen)
    Nezavist – GABAA receptor positive allosteric modulator
    NLX-101 (F-15599) – serotonin 5-HT1A receptor full agonist
    PSIL-001 (DMT analogue) – serotonin 5-HT1 receptor modulator (non-hallucinogenic)
    PSIL-002 (DMT analogue) – serotonin 5-HT1 receptor modulator (non-hallucinogenic)
    PSYLO-3001 (Psylo-3001) – non-hallucinogenic non-selective serotonin receptor agonist and psychoplastogen
    PSYLO-4001 (Psylo-4001) – non-hallucinogenic serotonin 5-HT2A receptor agonist and psychoplastogen
    SYT-510 – endocannabinoid reuptake inhibitor
    TF-0066 – undefined mechanism of action


    = Research

    =
    BHV-5000 – low-trapping ionotropic glutamate NMDA receptor antagonist
    NP-10679 – NR2B subunit-containing ionotropic glutamate NMDA receptor negative allosteric modulator
    Psilocybin (MYCO-001; MYCO-003) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    PSYLO-5001 (Psylo-5001) – non-hallucinogenic serotonin 5-HT2A receptor agonist and psychoplastogen
    Small molecule therapeutic - Rugen Therapeutics – undefined mechanism of action


    = Phase unknown

    =
    Amuxetine – serotonin, norepinephrine, and dopamine reuptake inhibitor
    EDG-005 – undefined mechanism of action
    EDG-006 – undefined mechanism of action
    Iloperidone (Fanapt; Fanaptum; Fiapta; HP-873; ILO-522; VYV-683; Zomaril) – atypical antipsychotic (non-selective monoamine receptor modulator)
    INV-407 – undefined mechanism of action
    Ketamine (intravenous/oral; Braxia) – ionotropic glutamate NMDA receptor antagonist
    SK-2110 (buprenorphine implant) – μ-opioid receptor partial agonist, κ-opioid receptor antagonist, and δ-opioid receptor antagonist – under development in China
    Venlafaxine (controlled-release) – serotonin and norepinephrine reuptake inhibitor


    Not under development




    = Development suspended

    =
    BVF-045 (bupropion/undisclosed serotonin reuptake inhibitor) – norepinephrine and dopamine reuptake inhibitor, nicotinic acetylcholine receptor negative allosteric modulator, and serotonin reuptake inhibitor combination
    Dexmedetomidine (BXCL-501; Igalmi; KalmPen) – α2-adrenergic receptor agonist
    ETX-155 – GABAA receptor positive allosteric modulator
    Ganaxolone (CCD-1042; Ztalmy) – GABAA receptor positive allosteric modulator and neurosteroid


    = No development reported

    =
    AAG-561 – corticotropin releasing hormone (CRH) inhibitor
    Adinazolam (Deracyn; U-41123; U-41123F) – GABAA receptor positive allosteric modulator and benzodiazepine
    Amitifadine (DOV-21947; EB-1010) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    AN-788 (NSD-788) – serotonin and dopamine reuptake inhibitor
    ANAVEX 1-41 (blarcamesine analogue) – sigma σ1 receptor agonist, muscarinic acetylcholine receptor modulator, and sodium and chloride channel modulator
    Aripiprazole (transdermal; AQS-1301) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Arketamine (HR-071603; (R)-ketamine nasal spray) – ionotropic glutamate NMDA receptor antagonist
    AZD-8108 – ionotropic glutamate NMDA receptor antagonist
    BCI-632 – metabotropic glutamate mGlu2 and mGlu3 receptor antagonist
    BCI-838 – metabotropic glutamate mGlu2 and mGlu3 receptor antagonist
    BMS-866949 (CSTI-500) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    BNC-210 (IW-2143) – α7 nicotinic acetylcholine receptor negative allosteric modulator
    Bryostatin 1 (MW-904) – protein kinase C (PKC) stimulant
    BTRX-246040 (LY-2940094) – nociceptin receptor antagonist
    Bupropion/naltrexone (Contrave) – norepinephrine and dopamine reuptake inhibitor, nicotinic acetylcholine receptor negative allosteric modulator, and μ-opioid receptor antagonist combination
    Cericlamine (JO-1017) – serotonin reuptake inhibitor
    Citalopram/pipamperone (PipCit; PNB-01) – serotonin reuptake inhibitor and typical antipsychotic combination
    Depression therapy - Genopia Biomedical – undefined mechanism of action
    (R)-Desmethylsibutramine ((+)-desmethylsibutramine; or (R)-desmethylsibutramine/(+)-didesmethylsibutramine) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    Deulumateperone (ITI-1284; lumateperone deuterated) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Dipraglurant (ADX-48621; mGluR5-NAM) – metabotropic glutamate mGlu5 receptor negative allosteric modulator
    Erteberel (LY-500307; SERBA-1) – estrogen receptor β (ERβ) agonist
    Esketamine (esketamine DPI; Falkieri; PG061; S-ketamine) – ionotropic glutamate NMDA receptor antagonist
    Eszopiclone (Lunesta) – GABAA receptor positive allosteric modulator and Z-drug
    EVT-101 (ENS-101) – NR2B subunit-containing ionotropic glutamate NMDA receptor negative allosteric modulator
    Fananserin (RP-62203) – serotonin 5-HT2A receptor antagonist and dopamine D4 receptor antagonist
    Fibroblast growth factor 1 (FGF-1) – fibroblast growth factor receptor (FGFR) agonist
    Filorexant (MK-6096) – orexin OX1 and OX2 receptor antagonist
    GEA-857 (alaproclate analogue) – potassium conductance putative blocker
    GSK-588045 – serotonin 5-HT1A, 5-HT1B, and 5-HT1D receptor antagonist
    GSK-1360707 – serotonin, norepinephrine, and dopamine reuptake inhibitor
    HS-10353 – GABAA receptor positive allosteric modulator
    Hypidone – serotonin reuptake inhibitor and serotonin 5-HT1A and 5-HT6 receptor agonist
    Igmesine (CI-1019; JO-1784) – sigma σ1 receptor agonist
    Imiloxan (RS-21361) – α2-adrenergic receptor antagonist
    IN-ASTR-001 – undefined mechanism of action
    Ketamine (transdermal patch; SHX-001) – ionotropic glutamate NMDA receptor antagonist
    Ketamine (sublingual; ketamine wafer; SLS-003; Wafermine) – ionotropic glutamate NMDA receptor antagonist
    KFM-19 – adenosine A1 receptor antagonist
    LSM-6 (3-hydroxy-N,N-dimethylphenethylamine) – undefined mechanism of action (adrenergic and serotonergic agent; constituent of Limacia scanden Lour.) – was under development in Malaysia
    Midomafetamine (3,4-methylenedioxymethamphetamine; MDMA; ecstasy) – serotonin, norepinephrine, and dopamine releasing agent and weak serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptor agonist (entactogen and weak psychedelic hallucinogen)
    Mitizodone (HEC-113995) – serotonin reuptake inhibitor and serotonin 5-HT1A and 5-HT1B receptor partial agonist
    Nivacortol (nivazole; NEBO-174; novozola) – glucocorticoid receptor antagonist
    Omiloxetine – serotonin reuptake inhibitor
    Oxitriptan (5-hydroxytryptophan; 5-HTP; EVX-301) – serotonin precursor
    Pseudohypericin – undefined mechanism of action (constituent of St John's wort)
    Psilocybin (CYB-001; INT0052/2020) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    Psilocybin (biosynthetic psilocybin; PB-1818) – non-selective serotonin receptor agonist and psychedelic hallucinogen
    QRX-002 – ionotropic glutamate NMDA receptor antagonist
    RG-7351 – trace amine-associated receptor 1 (TAAR1) agonist
    Riluzole (sublingual; BHV-0223; Nurtec) – complex mechanism of action or glutamatergic modulator
    Risperidone (Risperdal) – atypical antipsychotic (non-selective monoamine receptor modulator)
    SAR-102779 (SAR-10279) – neurokinin NK2 receptor antagonist
    SD-254 (deuterated venlafaxine) – serotonin and norepinephrine reuptake inhibitor
    SEP-378614 – undefined mechanism of action
    SNA-1 – undefined mechanism of action
    SPL-801-B ((2R,6R)-hydroxynorketamine; 6-HNK) – non-hallucinogenic ketamine derivative/metabolite
    TrkB receptor antagonist (Celon Pharma) – tropomyosin receptor kinase TrkB antagonist
    YDP-2225 – undefined mechanism of action


    = Development discontinued

    =
    ABT-436 – vasopressin V1b receptor antagonist
    Adatanserin (WAY-SEB-324; WY-50324; SEB-324) – serotonin 5-HT1A receptor partial agonist and serotonin 5-HT2A and 5-HT2C receptor antagonist
    ADX-71149 (JNJ-1813; JNJ-40411813; JNJ-mGluR2-PAM) – metabotropic glutamate mGlu2 receptor modulator
    Amesergide (LY-237733) – serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptor antagonist, α2-adrenergic receptor antagonist, and other actions
    Amibegron (SR-58611; SR-58611A) – β3-adrenergic receptor agonist
    Aprepitant (MK-869) – neurokinin NK1 receptor antagonist
    ARA-014418 (AR-A014418; GSK-3β Inhibitor VIII) – glycogen synthase kinase GSK-3β inhibitor
    Armodafinil (CEP-10953; Nuvigil; (R)-modafinil) – atypical dopamine reuptake inhibitor
    Atipamezole (antisedan; MPV-1248) – α2-adrenergic receptor antagonist
    Atomoxetine (LY-139603; Strattera; Tomoxetine) – norepinephrine reuptake inhibitor
    AZD-2066 – metabotropic glutamate mGlu5 receptor antagonist
    AZD-2327 – δ-opioid receptor agonist
    AZD-7268 – δ-opioid receptor agonist
    AZD-8129 (AR-A000002; AR-A2XX; AR-A2) – serotonin 5-HT1B receptor antagonist
    Basimglurant (NOE-101; RG-7090; RO-4917523) – metabotropic glutamate mGlu5 receptor antagonist
    Befloxatone (MD-370503) – monoamine oxidase MAO-A reversible inhibitor
    BMS-181101 (BMY-42569) – serotonin reuptake inhibitor and serotonin 5-HT1A and 5-HT1D receptor agonist
    Buspirone (transdermal; BuSpar Patch) – serotonin 5-HT1A receptor partial agonist
    Casopitant (GW-679769; GW679769) – neurokinin NK1 receptor antagonist
    Centpropazine – unknown mechanism of action
    Cibinetide (ARA-290) – erythropoietin receptor (EpoR) agonist
    Citalopram (controlled-release) – serotonin reuptake inhibitor
    Clavulanic acid (RX-10100; Serdaxin; Zoraxel) – β-lactamase inhibitor and unknown mechanism of action (glutamate transporter GLT1 expression enhancer, dopamine, glutamate, and serotonin modulator, possibly via Munc18-1 and Rab4 interactions)
    Clovoxamine (DU-23811) – serotonin and norepinephrine reuptake inhibitor
    Coluracetam (BCI-540; MKC-231) – ionotropic glutamate AMPA receptor positive allosteric modulator, choline uptake and acetylcholine synthesis enhancer, and racetam
    CP-316311 – corticotropin releasing hormone (CRH) inhibitor
    Crinecerfont (NBI-74788; SSR-125543; SSR-125543A) – corticotropin releasing factor receptor 1 (CRF1) antagonist
    CRL-41789 – undefined mechanism of action
    Cutamesine (AGY-94806; Msc-1; SA-4503) – sigma σ1 receptor agonist
    CX157 (KP157; TriRima; Tyrima) – monoamine oxidase MAO-A reversible inhibitor
    Dapoxetine (LY-210448; Priligy) – serotonin reuptake inhibitor
    Dasotraline (DSP-225289; SEP-225289; SEP-0225289; SEP-289) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    DDP-225 – norepinephrine reuptake inhibitor and serotonin 5-HT3 receptor antagonist
    Decoglurant – metabotropic glutamate mGlu2 and mGlu3 receptor antagonist
    Delequamine (RS-15385; RS-15385197) – α2-adrenergic receptor antagonist
    Delucemine (NPS-1506) – ionotropic glutamate NMDA receptor polyamine site antagonist and serotonin reuptake inhibitor
    Dexmecamylamine (AT-5214; NIH-11008; S-mecamylamine; TC-5214) – α3β4 and α4β2 nicotinic acetylcholine receptor negative allosteric modulator
    Dexnafenodone (LU-43706) – serotonin and norepinephrine reuptake inhibitor
    DMP-695 – corticotropin releasing hormone (CRH) inhibitor
    DOV-216303 – serotonin, norepinephrine, and dopamine reuptake inhibitor
    DPC-368 – undefined mechanism of action
    DSP-1200 – serotonin 5-HT2A receptor antagonist, dopamine D2 receptor antagonist, and α2A-adrenergic receptor antagonist
    Edivoxetine (EDP-125; LY-2216684) – norepinephrine reuptake inhbitor
    Elzasonan (CP-448187) – serotonin 5-HT1B and 5-HT1D receptor antagonist
    Emapunil (AC-5216; XBD-173) – translocator protein (TSPO; peripheral benzodiazepine receptor) agonist (neurosteroidogenesis stimulant)
    Emicerfont (GW-876008; GW-876008X) – corticotropin releasing factor receptor 1 (CRF1) antagonist
    Eplivanserin (Ciltyri; Sliwens; SR-46349; SR-46349B; SR-46615A) – serotonin 5-HT2A receptor antagonist
    Eptapirone (F-11440) – serotonin 5-HT1A receptor full agonist
    Esreboxetine ((S,S)-Reboxetine; AXS-14; PNU-165442G) – norepinephrine reuptake inhibitor
    Esuprone (LU-43839) – monoamine oxidase MAO-A reversible inhibitor
    Ethyl eicosapentaenoic acid (Ethyl-EPA) – omega-3 fatty acid
    Farampator (CX-691; ORG-24448) – ionotropic glutamate AMPA receptor positive allosteric modulator
    Fasoracetam (AEVI-001; LAM-105; MDGN-001; NFC-1; NS-105) – unknown mechanism of action (metabotropic glutamate receptor modulator) and racetam
    FCE-25876 – serotonin reuptake inhibitor
    Flerobuterol (CRL-40827) – β-adrenergic receptor agonist
    Flesinoxan (DU-29373) – serotonin 5-HT1A receptor agonist
    Flibanserin (Addyi; BIMT-17; Girosa) – serotonin 5-HT1A receptor agonist, serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptor antagonist, and dopamine D4 receptor antagonist
    (R)-Fluoxetine – serotonin reuptake inhibitor
    Fluparoxan (GR-50360; GR-50360A) – α2-adrenergic receptor antagonist
    Gaboxadol (LU-02030; LU-2-030; MK-0928; OV-101; THIP) – GABAA receptor agonist
    Girisopam (EGIS-5810; GYKI-51189) – GABAA receptor positive allosteric modulator and benzodiazepine
    GYKI-52895 – dopamine reuptake inhibitor
    Haloperidol (CLR-3001) – typical antipsychotic (non-selective monoamine receptor modulator; low-dose withdrawal therapy)
    HT-2157 (SNAP-37889) – galanin GAL3 receptor antagonist
    ICI-170809 (ZM-170809) – serotonin 5-HT2A, 5-HT2B, and 5-HT2C receptor antagonist
    Idazoxan – α2-adrenergic receptor antagonist
    Ipsapirone (BAY-Q-7821; TVX-Q-7821) – serotonin 5-HT1A receptor partial agonist
    IRFI-165 – adenosine A1 receptor antagonist
    Istradefylline (KW-6002; Nourianz; Nouriast) – adenosine A2 receptor antagonist
    JNJ-18038683 – serotonin 5-HT7 receptor antagonist
    JNJ-19567470 (CRA-5626; R-317573) – corticotropin releasing factor receptor 1 (CRF1) antagonist
    JNJ-26489112 – unknown mechanism of action (topiramate successor)
    JNJ-39393406 – α7 nicotinic acetylcholine receptor positive allosteric modulator
    Lanicemine (AZD-6765) – low-trapping ionotropic glutamate NMDA receptor antagonist
    LB-100 (LB-1) – protein phosphatase 2A (PP2A) inhibitor
    Levoprotiline (CGP-12103; CGP-12103A; CGS-12103; R(–)-oxaprotiline; R(–)-hydroxymaprotiline) – histamine H1 receptor antagonist, other actions, and tetracyclic antidepressant
    Lithium – unknown mechanism of action and mood stabilizer
    Litoxetine (IXA-001; SL-810385) – serotonin reuptake inhibitor and weak serotonin 5-HT3 receptor antagonist
    Losmapimod (FTX-1821; GS-856553; GSK-856553; GW-856553; GW-856553X) – p38-α/β mitogen-activated protein kinase (MAPK) inhibitor and double homeobox 4 (DUX4) inhibitor
    LU-AA34893 (LU-AA-34893) – serotonin receptor modulator
    LU-AA39959 (LU-AA-39959) – ion channel modulator
    Lubazodone (SM-50C; YM-35992; YM-992) – serotonin reuptake inhibitor and serotonin 5-HT2A receptor antagonist
    Masitinib (AB-07105; AB-1010; Alsitek; Masican; Masipro; Masiviera) – tyrosine kinase inhibitor and other actions
    Mecamylamine (Inversine; Tridmac) – nicotinic acetylcholine receptor negative allosteric modulator
    MIN-117 (WF-516) – serotonin and dopamine reuptake inhibitor, serotonin 5-HT1A and 5-HT7 receptor antagonist, and α1-adrenergic receptor antagonist
    MK-1942 – undefined mechanism of action
    ML-105 – undefined mechanism of action
    Naloxone/tianeptine (TNX-601; TNX-601-CR; TNX-601-ER) – weak and atypical μ- and δ-opioid receptor agonist, other actions, tricyclic antidepressant, and μ-opioid receptor antagonist combination
    Naluzotan (PRX-00023) – serotonin 5-HT1A receptor partial agonist and sigma σ1 receptor antagonist
    NB-415 – vasopressin V1b receptor antagonist
    Neboglamine (nebostinel; CR-2249; XY-2401) – ionotropic glutamate NMDA receptor glycine site positive allosteric modulator
    Nefiracetam (BRN 6848330; CCRIS 6729; DM 9384; DMPPA; DN-9384; DZL-221; HL-0812; HPI-001; Motiva; Translon) – unknown mechanism of action (voltage-gated calcium channel potentiator, α4β2 nicotinic acetylcholine receptor potentiator, ionotropic glutamate NMDA receptor potentiator (possible glycine site partial positive allosteric modulator), ionotropic glutamate AMPA receptor potentiator, and GABAA receptor agonist) and racetam
    Nemifitide (INN-00835) – unknown mechanism of action
    NS-2359 (GSK-372475) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    NS-2389 (GW-650250; GW-650250A) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    ORM-10921 – α2C-adrenergic receptor antagonist
    Orvepitant (GW-823296; GW-823296X; GW823296) – neurokinin NK1 receptor antagonist
    Osanetant (ACER-801; SR-142801; SR-142806) – neurokinin NK3 receptor antagonist
    Pexacerfont (BMS-562086) – corticotropin releasing factor receptor 1 (CRF1) antagonist
    PF-04455242 – κ-opioid receptor antagonist
    PT-150 (ORG-34517; SCH-900636) – glucocorticoid receptor antagonist and androgen receptor antagonist
    Radafaxine (GW-353162; (2S,3S)-hydroxybupropion) – norepinephrine and dopamine reuptake inhibitor
    Ramelteon (Rozerem; TAK-375) – melatonin MT1 and MT2 receptor agonist
    Rapastinel (BV-102; GLYX-13; TPPT-amide) – ionotropic glutamate NMDA receptor glycine site partial agonist
    RG-7166 – serotonin, norepinephrine, and dopamine reuptake inhibitor
    Ritanserin (R-55667) – serotonin 5-HT2A and 5-HT2C receptor antagonist
    Robalzotan (AZD-7371; NAD-299) – serotonin 5-HT1A receptor antagonist
    Rolipram (ME-3167; ZK-62711) – phosphodiesterase 4 (PDE4) inhibitor
    Sabcomeline (BCI-224; CEB-242; Memric; SB-202026) – muscarinic acetylcholine M1 receptor agonist
    Saredutant (SR-48968) – neurokinin NK2 receptor antagonist
    SB-236057 – serotonin 5-HT1B receptor inverse agonist
    SB-245570 – serotonin 5-HT1B receptor antagonist
    Sibutramine (Aoquqing; BTS-54524; Ectiva; KES-524; Meridia; Reductase; Reductil; Reduxade; Sibutral) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    Siramesine (LU-28179) – sigma σ2 receptor agonist
    Sirukumab (CNTO-136; Plivensia) – interleukin 6 (IL-6) inhibitor
    SKL-10406 (SKL-DEP) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    SKL-PSY (FZ-016) – serotonin 5-HT1A receptor agonist
    Sodium phenylbutyrate (slow-release; LU-901; Lunaphen) – histone deacetylase (HDAC) inhibitor
    SSR-149415 (SR-149415) – vasopressin V1b receptor antagonist
    SSR-241586 – neurokinin NK2 and NK3 receptor antagonist
    Tandospirone (metanopirone; Sediel; SM-3997) – serotonin 5-HT1A receptor partial agonist and α2-adrenergic receptor antagonist
    Tasimelteon (BMS-214778; Hetlioz; VEC-162) – melatonin MT1 and MT2 receptor agonist
    Tedatioxetine (LU-AA24530) – serotonin, norepinephrine, and dopamine reuptake inhibitor, serotonin 5-HT2A, 5-HT2C, and 5-HT3 receptor antagonist, and α1A-adrenergic receptor antagonist
    Tianeptine (JNJ-39823277; TPI-1062) – weak and atypical μ- and δ-opioid receptor agonist, other actions, and tricyclic antidepressant
    TS-111 – undefined mechanism of action
    Tulrampator (CX-1632; S-47445) – ionotropic glutamate AMPA receptor positive allosteric modulator
    Vanoxerine (boxeprazine; GBR-12909) – atypical dopamine reuptake inhibitor
    Verucerfont (GSK-561679; NBI-77860) – corticotropin releasing factor receptor 1 (CRF1) antagonist
    Vestipitant (GW-597599; GW-597599B) – neurokinin NK1 receptor antagonist
    Viloxazine (Qelbree) – norepinephrine reuptake inhibitor
    VN-2222 – serotonin reuptake inhibitor and serotonin 5-HT1A receptor partial agonist
    VUFB-17649 – serotonin reuptake inhibitor
    VUFB-18285 – serotonin reuptake inhibitor
    ZD-4974 – neurokinin NK1 receptor antagonist
    Zelatriazin (TAK-041; NBI-1065846; NBI-846) – G protein-coupled receptor 139 (GPR139) agonist
    Ziprasidone (Geodon) – atypical antipsychotic (non-selective monoamine receptor modulator)


    = Preregistration submission withdrawal

    =
    Aripiprazole/sertraline (ASC-01) – atypical antipsychotic (non-selective monoamine receptor modulator) and serotonin reuptake inhibitor combination


    = Formal development never or not yet started

    =
    Mevidalen (LY-3154207; D1 PAM) – dopamine D1 receptor positive allosteric modulator – under development for Lewy body disease
    Nitrous oxide (N2O; "laughing gas") – ionotropic glutamate NMDA receptor antagonist – being studied for depression but doesn't seem to be being formally developed towards approval


    Clinically used drugs




    = Approved drugs

    =
    Agomelatine (Valdoxan) – serotonin 5-HT2C receptor antagonist and melatonin MT1 and MT2 receptor agonist
    Amineptine (Survector, Maneon) – norepinephrine and dopamine reuptake inhibitor – withdrawn
    Amisulpride (Solian) – atypical antipsychotic (dopamine D2 and D3 receptor antagonist and serotonin 5-HT2B and 5-HT7 receptor antagonist)
    Amitriptyline (Elavil) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Amoxapine (Asendin) – tetracyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Aripiprazole (Abilify) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Brexanolone (allopregnanolone; SAGE-547; SGE-102; Zulresso) – GABAA receptor positive allosteric modulator and neurosteroid – approved for postpartum depression
    Brexpiprazole (Rexulti) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Bupropion (Wellbutrin) – norepinephrine and dopamine reuptake inhibitor and nicotinic acetylcholine receptor negative allosteric modulator
    Bupropion/dextromethorphan (Auvelity) – sigma σ1 receptor agonist, serotonin reuptake inhibitor, norepinephrine and dopamine reuptake inhibitor, nicotinic acetylcholine receptor negative allosteric modulator, ionotropic glutamate NMDA receptor antagonist, other actions, and CYP2D6 inhibitor combination
    Butriptyline (Evadyne) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator) – discontinued
    Cariprazine (Vraylar) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Citalopram (Celexa) – serotonin reuptake inhibitor
    Desipramine (Norpramin) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Desvenlafaxine (Pristiq) – serotonin and norepinephrine reuptake inhibitor
    Desvenlafaxine (extended-release; Khedezla) – serotonin and norepinephrine reuptake inhibitor – withdrawn
    Desvenlafaxine (extended-release; WIP-DF17) – serotonin and norepinephrine reuptake inhibitor – registered in South Korea
    Dosulepin (dothiepin; Prothiaden) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Doxepin (Sinequan) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Duloxetine (Cymbalta; Drizalma Sprinkle) – serotonin and norepinephrine reuptake inhibitor
    Escitalopram (Lexapro) – serotonin reuptake inhibitor
    Esketamine (Spravato) – ionotropic glutamate NMDA receptor antagonist
    Fluoxetine (Prozac; Sarafem) – serotonin reuptake inhibitor
    Fluvoxamine (Luvox) – serotonin reuptake inhibitor
    Gepirone (Exxua) – serotonin 5-HT1A receptor partial agonist and α2-adrenergic receptor antagonist
    Hypericum extract (LI-160; St John's wort) – undefined mechanism of action
    Imipramine (Tofranil) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Iproniazid (Marsilid) – monoamine oxidase MAO-A and MAO-B irreversible inhibitor – withdrawn
    Isocarboxazid (Marplan) – monoamine oxidase MAO-A and MAO-B irreversible inhibitor
    Levomilnacipran (Fetzima) – serotonin and norepinephrine reuptake inhibitor
    Levosulpiride (L-sulpiride; Levobren; Levopraid; Levosulpride; RV-12309; Sulpepta) – dopamine D2 and D3 receptor antagonist and serotonin 5-HT4 receptor agonist
    Lofepramine (Lomont) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Lumateperone (Caplyta) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Lurasidone (Latuda) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Maprotiline (Ludiomil) – tetracyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Mianserin (Tolvon) – tetracyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Milnacipran (Dalcipran; Ixel; Savella) – serotonin and norepinephrine reuptake inhibitor
    Mirtazapine (Remeron) – α2-adrenergic receptor antagonist, serotonin 5-HT2A, 5-HT2C, and 5-HT3 receptor antagonist, histamine H1 receptor inverse agonist, and tetracyclic antidepressant
    Moclobemide (Aurorix; Manerix) – monoamine oxidase MAO-A reversible inhibitor
    Nefazodone (BMY-13754; Dutonin; MJ-13754; MS-13754; Nefadar; Serzone) – serotonin 5-HT1A receptor ligand, serotonin 5-HT2A and 5-HT2C receptor antagonist, α1- and α2-adrenergic receptor antagonist, weak serotonin, norepinephrine, and dopamine reuptake inhibitor, and other actions – mostly withdrawn
    Nomifensine (Merital; Alival) – norepinephrine and dopamine reuptake inhibitor – withdrawn
    Nortriptyline (Aventyl) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Olanzapine (Zyprexa) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Olanzapine/fluoxetine (OFC; Symbyax; ZypZac) – atypical antipsychotic (non-selective monoamine receptor modulator) and serotonin reuptake inhibitor combination
    Opipramol (Ensidon; G-33040; Insidon; Nisidana) – sigma σ1 and σ2 receptor agonist, serotonin 5-HT2A receptor antagonist, dopamine D2 receptor antagonist, α1-adrenergic receptor antagonist, histamine H1 receptor antagonist, other actions, and tricyclic antidepressant
    Paroxetine (Paxil; Seroxat) – serotonin reuptake inhibitor
    Phenelzine (Nardil) – monoamine oxidase MAO-A and MAO-B irreversible inhibitor
    Protriptyline (Vivactil) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Quetiapine (Seroquel) – atypical antipsychotic (non-selective monoamine receptor modulator)
    Reboxetine (Edronax) – norepinephrine reuptake inhibitor
    Selegiline (Emsam) – monoamine oxidase MAO-B irreversible inhibitor, catecholaminergic activity enhancer, and weak norepineprhine releasing agent (via metabolites)
    Sertraline (Zoloft; Lustral) – serotonin reuptake inhibitor
    Setiptiline (Tecipul; Tesolon) – serotonin receptor antagonist, α2-adrenergic receptor antagonist, norepinephrine reuptake inhibitor, and tetracyclic antidepressant
    Tianeptine (Coaxil; Stablon; Tatinol) – weak and atypical μ- and δ-opioid receptor agonist, other actions, and tricyclic antidepressant
    Toludesvenlafaxine (ansofaxine; 4-methylbenzoate desvenlafaxine; desvenlafaxine prodrug; LPM-570065; LY-03005; Ruoxinlin) – serotonin, norepinephrine, and dopamine reuptake inhibitor
    Tranylcypromine (Parnate) – monoamine oxidase MAO-A and MAO-B irreversible inhibitor
    Trazodone (Oleptro; Trittico) – serotonin 5-HT1A receptor partial agonist, serotonin 5-HT2A and 5-HT2C receptor antagonist, α1- and α2-adrenergic receptor antagonist, weak serotonin reuptake inhibitor, and other actions
    Trimipramine (Surmontil) – tricyclic antidepressant (non-selective monoamine reuptake inhibitor and/or receptor modulator)
    Venlafaxine (Effexor) – serotonin and norepinephrine reuptake inhibitor
    Vilazodone (Viibryd) – serotonin reuptake inhibitor and serotonin 5-HT1A receptor agonist
    Viloxazine (Vivalan) – norepinephrine reuptake inhibitor
    Vortioxetine (Trintellix) – serotonin reuptake inhibitor, serotonin 5-HT1A and 5-HT1B receptor agonist, and serotonin 5-HT1D, 5-HT3, and 5-HT7 receptor antagonist
    Zimelidine (Zelmid) – serotonin reuptake inhibitor – withdrawn
    Zuranolone (BIIB-125; S-812217; SAGE-217; SGE-797; Zurzuvae) – GABAA receptor positive allosteric modulator and neurosteroid – approved for postpartum depression


    See also


    List of antidepressants
    List of investigational drugs


    References




    Further reading




    External links


    AdisInsight - Springer

Kata Kunci Pencarian: list of investigational antidepressants

list of investigational antidepressantslist of investigational antidepressants wiki