Dothiepin

drug
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Also known as DosulepinDosulepinaDosulepineDothirpinSID11112454

Summary

Dothiepin (CHEMBL1492500) is an approved small molecule (ATC N06AA16) targeting CHRM1, CHRM2, and CHRM3; indicated across 1 condition including depressive disorder.

At a glance

  • Status: Approved (max clinical phase 4)
  • Modality: Small molecule
  • ATC class: N06AA16
  • Targets: 8 (CHRM1, CHRM2, CHRM3…)
  • Indications: 1 condition
  • Clinical trials: 2
  • Chemistry: 295.4 Da · C19H21NS

Identifiers

Drug identity and classification

FieldValue
ChEMBL IDCHEMBL1492500
NameDothiepin
TypeSmall molecule
Max phase4
FDA approvedno
PubChem CID5284550
ChEBICHEBI:36803
ATCN06AA16
Molecular formulaC19H21NS
Molecular weight295.4
InChIKeyPHTUQLWOUWZIMZ-GZTJUZNOSA-N

SMILES: CN(C)CC/C=C/1\C2=CC=CC=C2CSC3=CC=CC=C31

IUPAC name: (3E)-3-(6H-benzo[c][1]benzothiepin-11-ylidene)-N,N-dimethylpropan-1-amine

Also known as: Dosulepin, Dosulepina, Dosulepine, Dothiepin, Dothirpin, SID11112454, DOSULEPINE, DOTHIEPIN, dosulepin, DOSULEPIN

Parent form; salt/anhydrous children: CHEMBL1711280

Patent coverage: 13 distinct patent families (24 SureChEMBL compound mentions), from 2 matched compound structure(s). One matched structure accounts for 19 (79%) of the total. Mentions count patents naming the compound (not distinct inventions), so promiscuous / reference molecules inflate the mention figure — families are the dedup metric.

Targets

Targets

Primary targets (GtoPdb curated mechanism): the Cancer dependency column is the DepMap CRISPR fitness signal (% of screened cell lines dependent on the target).

GeneTargetActionpAffinityCancer dependencyUniProt
CHRM1M1 receptorAntagonist7.740.2%P11229
CHRM2M2 receptorAntagonist6.960%P08172
CHRM3M3 receptorAntagonist7.420%P20309
CHRM4M4 receptorAntagonist7.211.6%P08173
CHRM5M5 receptorAntagonist7.040%P08912
HRH1H1 receptorAntagonist8.40%P35367
SLC6A2NETInhibition7.340.4%P23975
SLC6A4SERTInhibition8.070.7%P31645

Broader ChEMBL bioactivity targets: 23 (assay-derived). Sample: 5-hydroxytryptamine receptor 2B, Alpha-2A adrenergic receptor, Alpha-2C adrenergic receptor, Alpha-2B adrenergic receptor, Muscarinic acetylcholine receptor M2, Muscarinic acetylcholine receptor M1, D(2) dopamine receptor, Sodium-dependent noradrenaline transporter, 5-hydroxytryptamine receptor 2A, 5-hydroxytryptamine receptor 2C, Sodium-dependent serotonin transporter, Alpha-1A adrenergic receptor, Histamine H1 receptor, D(3) dopamine receptor, Kappa-type opioid receptor, Sodium-dependent dopamine transporter, Voltage-gated inwardly rectifying potassium channel KCNH2, Muscarinic acetylcholine receptor M3, Histamine H3 receptor, Cytochrome P450 2D6.

Bioactivity

ChEMBL activities: 19 potent at pChembl ≥ 5 of 25 total. Top 100 by potency (10 = 0.1 nM, 6 = 1 µM):

TargetpChemblTypeValueUnitActivity ID
SLC6A48AC509.9nMCHEMBL_ACT_25149828
HRH17.72AC5019nMCHEMBL_ACT_25211985
CHRM36.38AC50420nMCHEMBL_ACT_25136190
CHRM16.17AC50670nMCHEMBL_ACT_25134924
SLC6A26.1AC50800nMCHEMBL_ACT_25144492
ADRA1A6.06AC50870nMCHEMBL_ACT_25217708
ALDH1A15.9Potency1259nMCHEMBL_ACT_4186931
ADRA2B5.89AC501300nMCHEMBL_ACT_25143187
CHRM25.85AC501400nMCHEMBL_ACT_25213242
KCNH25.82AC501500nMCHEMBL_ACT_25117081
HTR2C5.8AC501600nMCHEMBL_ACT_25131295
OPRK15.57AC502700nMCHEMBL_ACT_25128957
DRD35.52AC503000nMCHEMBL_ACT_25193013
ADRA1A5.5AC503200nMCHEMBL_ACT_25137624
HTR2B5.44AC503600nMCHEMBL_ACT_25227033
HTR2A5.32AC504800nMCHEMBL_ACT_25224692
CYP2D65.1Potency7943nMCHEMBL_ACT_4949782
CYP2D65.1AC507943nMCHEMBL_ACT_5988705
ADRA2C5.01AC509800nMCHEMBL_ACT_25147350

Target pathways

Aggregated over 8 target gene(s): CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4.

Top Reactome pathways

30 total, by targets touching each:

PathwayTargetsGenes
Signal Transduction5CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
Signaling by GPCR5CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
Class A/1 (Rhodopsin-like receptors)5CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
Amine ligand-binding receptors5CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
GPCR downstream signalling5CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
Muscarinic acetylcholine receptors5CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
GPCR ligand binding5CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
G alpha (q) signalling events4CHRM1, CHRM3, CHRM5, HRH1
G alpha (i) signalling events2CHRM2, CHRM4
SLC-mediated transport of neurotransmitters2SLC6A2, SLC6A4
Neurotransmitter clearance1SLC6A4
Transmission across Chemical Synapses1SLC6A4
Neuronal System1SLC6A4
Metabolism1CHRM3
Integration of energy metabolism1CHRM3
Disease1SLC6A2
Membrane Trafficking1CHRM2
Serotonin clearance from the synaptic cleft1SLC6A4
Transport of small molecules1SLC6A2
Histamine receptors1HRH1
Acetylcholine regulates insulin secretion1CHRM3
Regulation of insulin secretion1CHRM3
R-HSA-4253661SLC6A2
SLC-mediated transmembrane transport1SLC6A2
SLC transporter disorders1SLC6A2
Defective SLC6A2 causes orthostatic intolerance (OI)1SLC6A2
Disorders of transmembrane transporters1SLC6A2
Vesicle-mediated transport1CHRM2
Cargo recognition for clathrin-mediated endocytosis1CHRM2
Clathrin-mediated endocytosis1CHRM2

Dominant GO biological processes

GO termTargets
chemical synaptic transmission7
signal transduction6
G protein-coupled receptor signaling pathway6
G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger6
adenylate cyclase-inhibiting G protein-coupled acetylcholine receptor signaling pathway5
G protein-coupled acetylcholine receptor signaling pathway5
phospholipase C-activating G protein-coupled acetylcholine receptor signaling pathway3
nervous system development3
acetylcholine receptor signaling pathway3
phospholipase C-activating G protein-coupled receptor signaling pathway2
regulation of locomotion2
saliva secretion2
regulation of smooth muscle contraction2
memory2
neurotransmitter transport2

Indications & clinical

Indications

1 approved indication. FDA phase 4, plus an anticancer drug’s labelled cancer uses (which ChEMBL often logs at phase 3).

IndicationPhaseMONDOEFO
depressive disorder4MONDO:0002050MONDO:0002009

Clinical trials

Total trials: 2.

Phase distribution

PhaseTrials
PHASE41
Not specified1

Top trials by phase / activity

NCTPhaseStatusTitle
NCT06803485PHASE4RECRUITINGEffect of Venlafaxine Versus Dosulepin in Pain Predominant Somatic Symptom Disorder
NCT03126188Not specifiedCOMPLETEDStudy of the Effect of Antidepressant Drugs on Neurotrophic Factors in Patients With Depression

Clinical evidence (CIViC)

No CIViC predictive evidence (expected for non-precision-medicine drugs).

Pharmacology

Pharmacogenomics

No PharmGKB pharmacogenomic data curated for this drug.

Molecules sharing ≥1 of this drug’s curated primary targets, merged from two biobtree sources and ranked by shared-target count, then clinical phase: ChEMBL clinical-stage candidates (development phase ≥2) and PubChem drug-class bioactivity (approved / known drugs acting on the target). Deduplicated by drug name; the drug’s own salt forms are excluded. Note: for a drug with few primary targets a shared-target match can reflect off-target / promiscuous binding rather than the same therapeutic mechanism — the phase ordering surfaces bona-fide therapeutics first.

895 molecules share ≥1 primary target. Top 100 by shared-target count:

MoleculeSourceStatusShared targets
ACLIDINIUM BROMIDEChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
AMITRIPTYLINEChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
CLOZAPINEChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
DESLORATADINEChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
AMIODARONEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
AMOXAPINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
ASTEMIZOLEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
BENZTROPINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
CHLORPROMAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
CINNARIZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
CLEMASTINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
CLOMIPRAMINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
CYPROHEPTADINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
DEXCHLORPHENIRAMINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
DIPHENHYDRAMINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
DOXEPINChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
EBASTINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
HALOPERIDOLChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
IMIPRAMINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
LOXAPINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
MEPAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
MIANSERINChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
NORTRIPTYLINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
ORPHENADRINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
PROCHLORPERAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
PROMAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
PROMETHAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
RISPERIDONEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
SERTRALINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
SULOCTIDILChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
THIORIDAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
DIMETHINDENEChEMBLPhase 3CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
FLUNARIZINEChEMBLPhase 2CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
GENTIAN VIOLETChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
OLANZAPINEChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A4
CLOTRIMAZOLEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, HRH1, SLC6A2, SLC6A4
DIMENHYDRINATEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2
FLUOXETINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM5, HRH1, SLC6A2, SLC6A4
FLUPHENAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, HRH1, SLC6A2, SLC6A4
MAPROTILINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A2
PAROXETINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
PERHEXILINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
TAMOXIFENChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
TERCONAZOLEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
TOLTERODINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1, SLC6A4
XANOMELINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
ENCLOMIPHENEChEMBLPhase 3CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
BENZETHONIUM CHLORIDEChEMBLPhase 2CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
ZOTEPINEChEMBLPhase 2CHRM1, CHRM2, CHRM3, CHRM4, HRH1, SLC6A2, SLC6A4
AfatinibChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
chenodiolChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
DihydroergotamineChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
LINAGLIPTINChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
PropoxypheneChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
TadalafilChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
CARIPRAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM4, CHRM5, HRH1, SLC6A4
CHLORPHENIRAMINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM5, HRH1, SLC6A2, SLC6A4
CLIDINIUMChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A4
CYCLIZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1
CYCLOBENZAPRINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
DARIFENACINChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A4
DESIPRAMINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
DICYCLOMINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1
ECONAZOLEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, SLC6A2, SLC6A4
GLYCOPYRRONIUM BROMIDEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1
KETOTIFENChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1
LASOFOXIFENEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
METHAPYRILENEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM5, HRH1, SLC6A2, SLC6A4
MICONAZOLEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, SLC6A2, SLC6A4
NEFOPAMChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
OXYBUTYNINChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2
PIPERACETAZINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
QUETIAPINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1
QUINACRINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, SLC6A2
SULCONAZOLEChEMBLPhase 4 (approved)CHRM1, CHRM3, CHRM4, CHRM5, SLC6A2, SLC6A4
SUNITINIBChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
THIOTEPAChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
TIOTROPIUM BROMIDEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5, HRH1
MELITRACENChEMBLPhase 3CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
OTILONIUM BROMIDEChEMBLPhase 3CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
BENZETHONIUMChEMBLPhase 2CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
CLOTHIAPINEChEMBLPhase 2CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
DOMIPHENChEMBLPhase 2CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
MEQUITAZINEChEMBLPhase 2CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
NIGULDIPINEChEMBLPhase 2CHRM2, CHRM3, CHRM5, HRH1, SLC6A2, SLC6A4
OXATOMIDEChEMBLPhase 2CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
THIOPROPERAZINEChEMBLPhase 2CHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
ApixabanPubChemApprovedCHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
BinimetinibPubChemApprovedCHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
BosentanPubChemApprovedCHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
FulvestrantPubChemApprovedCHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
ImipenemPubChemApprovedCHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
PyrazinamidePubChemApprovedCHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
TafamidisPubChemApprovedCHRM1, CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
Tiotropium Bromide MonohydratePubChemApprovedCHRM3, CHRM4, CHRM5, HRH1, SLC6A2, SLC6A4
MavorixaforChEMBL + PubChemPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
OLODATEROLChEMBL + PubChemPhase 4 (approved)CHRM2, CHRM3, HRH1, SLC6A2, SLC6A4
ACETYLCHOLINEChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, CHRM4, CHRM5
AMBENONIUMChEMBLPhase 4 (approved)CHRM1, CHRM2, CHRM3, SLC6A2, SLC6A4
ARIPIPRAZOLEChEMBLPhase 4 (approved)CHRM1, CHRM2, HRH1, SLC6A2, SLC6A4