Astemizole

drug
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Also known as AstemizolGNF-Pf-2461HismanalNSC-329963NSC-759570Pollon-ezeR 43,512SID11112828SID26746979SID26751496SID26751497SID855746AstemizioleSID104171329SID124882662SID56422418SID124882660SID144204231SID170465888

Summary

Astemizole (CHEMBL296419) is an approved small-molecule H1-receptor antagonist (ATC R06AX11) targeting HRH1, KCNH1, and KCNH2; indicated across 1 condition including allergic disease.

At a glance

  • Status: Approved (max clinical phase 4)
  • Modality: Small molecule
  • ATC class: R06AX11
  • Targets: 3 (HRH1, KCNH1, KCNH2)
  • Indications: 1 condition
  • Chemistry: 458.6 Da · C28H31FN4O

Identifiers

Drug identity and classification

FieldValue
ChEMBL IDCHEMBL296419
NameAstemizole
TypeSmall molecule
Max phase4
FDA approvedno
PubChem CID2247
ChEBICHEBI:2896
ATCR06AX11
Molecular formulaC28H31FN4O
Molecular weight458.6
InChIKeyGXDALQBWZGODGZ-UHFFFAOYSA-N

SMILES: COC1=CC=C(C=C1)CCN2CCC(CC2)NC3=NC4=CC=CC=C4N3CC5=CC=C(C=C5)F

IUPAC name: 1-[(4-fluorophenyl)methyl]-N-[1-[2-(4-methoxyphenyl)ethyl]piperidin-4-yl]benzimidazol-2-amine

ChEBI definition: A piperidine compound having a 2-(4-methoxyphenyl)ethyl group at the 1-position and an N-[(4-fluorobenzyl)benzimidazol-2-yl]amino group at the 4-position.

Pharmacological roles (ChEBI): H1-receptor antagonist, anti-allergic agent, anticoronaviral agent.

Also known as: Astemizol, Astemizole, GNF-Pf-2461, Hismanal, NSC-329963, NSC-759570, Pollon-eze, R 43,512, astemizole, SID11112828, SID26746979, SID26751496

Parent form; salt/anhydrous children: CHEMBL1788122

Patent coverage: 5,654 distinct patent families (21,577 SureChEMBL compound mentions), from 1 matched compound structure(s). 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
HRH1H1 receptorAntagonist8.520%P35367
KCNH1Kv10.16.70.2%O95259
KCNH2Kv11.190.3%Q12809

Broader ChEMBL bioactivity targets: 85 (assay-derived). Sample: Microtubule-associated protein tau, Ubiquitin carboxyl-terminal hydrolase 2, Nuclear receptor ROR-gamma, Survival motor neuron protein, Prelamin-A/C, Inositol monophosphatase 1, 4’-phosphopantetheinyl transferase ffp, Multidrug and toxin extrusion protein 1, Somatostatin receptor type 5, Muscarinic acetylcholine receptor M4.

Bioactivity

ChEMBL activities: 173 potent at pChembl ≥ 5 of 224 total. Top 30 by potency (10 = 0.1 nM, 6 = 1 µM):

TargetpChemblTypeValueUnitActivity ID
KCNH29.05IC500.9nMCHEMBL_ACT_1718508
KCNH29.05IC500.9nMCHEMBL_ACT_323349
KCNH29.05IC500.9nMCHEMBL_ACT_929869
KCNH29.04IC500.91nMCHEMBL_ACT_1427110
KCNH29.04IC500.91nMCHEMBL_ACT_2645533
KCNH28.82IC501.5nMCHEMBL_ACT_1449116
HRH18.79Ki1.61nMCHEMBL_ACT_7620301
KCNH28.72EC501.9nMCHEMBL_ACT_13940698
KCNH28.68Ki2.1nMCHEMBL_ACT_13340293
HRH18.68Ki2.09nMCHEMBL_ACT_7846196
KCNH28.59IC502.6nMCHEMBL_ACT_13340358
KCNH28.54Ki2.9nMCHEMBL_ACT_1901338
HRH18.52Ki3nMCHEMBL_ACT_929868
KCNH28.48IC503.31nMCHEMBL_ACT_16575559
P313898.42Kd3.8nMCHEMBL_ACT_7846166
KCNH28.4IC504nMCHEMBL_ACT_25524869
KCNH28.38IC504.2nMCHEMBL_ACT_23290193
KCNH28.38IC504.2nMCHEMBL_ACT_25022991
HTR2A8.25Ki5.58nMCHEMBL_ACT_7620411
KCNH28.22IC506.03nMCHEMBL_ACT_1036238
HTR2B8.13Ki7.49nMCHEMBL_ACT_7620413
KCNH28.1IC508nMCHEMBL_ACT_10971942
KCNH28IC5010nMCHEMBL_ACT_1053111
KCNH28IC5010nMCHEMBL_ACT_1523554
KCNH28IC5010nMCHEMBL_ACT_2358326
KCNH28AC5010nMCHEMBL_ACT_25117304
P431408Ki9.9nMCHEMBL_ACT_7618864
KCNH27.96Ki11nMCHEMBL_ACT_16592941
KCNH27.94IC5011.48nMCHEMBL_ACT_5218952
HTR2B7.92IC5012nMCHEMBL_ACT_7620412

Target pathways

Aggregated over 3 target gene(s): HRH1, KCNH1, KCNH2.

Top Reactome pathways

8 total, by targets touching each:

PathwayTargetsGenes
Neuronal System2KCNH1, KCNH2
Potassium Channels2KCNH1, KCNH2
Voltage gated Potassium channels2KCNH1, KCNH2
Histamine receptors1HRH1
Muscle contraction1KCNH2
G alpha (q) signalling events1HRH1
Phase 3 - rapid repolarisation1KCNH2
Cardiac conduction1KCNH2

Dominant GO biological processes

GO termTargets
potassium ion transport2
regulation of membrane potential2
potassium ion transmembrane transport2
monoatomic ion transport2
monoatomic ion transmembrane transport2
transmembrane transport2
inflammatory response1
G protein-coupled receptor signaling pathway1
G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger1
phospholipase C-activating G protein-coupled receptor signaling pathway1
chemical synaptic transmission1
memory1
visual learning1
regulation of vascular permeability1
positive regulation of vasoconstriction1

Indications & clinical

Indications

1 indication (1 at ChEMBL trial phase 4). Phase below is the highest clinical-trial phase recorded for this drug against each disease — not the molecule’s overall approval status (that is in the Summary).

IndicationTrial phaseMONDOEFO
allergic disease4MONDO:0005271MONDO:0005271

Clinical trials

Total trials: 0.

Clinical evidence (CIViC)

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

Pharmacology

Pharmacogenomics

No CPIC/DPWG dosing guideline or drug-level clinical/variant annotations in PharmGKB for this molecule.

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.

724 molecules share ≥1 primary target. Top 60 by shared-target count:

MoleculeSourceStatusShared targets
HALOPERIDOLChEMBL + PubChemPhase 4 (approved)HRH1, KCNH1, KCNH2
IMIPRAMINEChEMBL + PubChemPhase 4 (approved)HRH1, KCNH1, KCNH2
ACLIDINIUM BROMIDEChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
AfatinibChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
AlmotriptanChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
CrizotinibChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
dacomitinibChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
DESLORATADINEChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
DIHYDROERGOTAMINEChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
DofetilideChEMBL + PubChemPhase 4 (approved)KCNH1, KCNH2
ErythromycinChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
OlodaterolChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
PALIPERIDONEChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
PropoxypheneChEMBL + PubChemPhase 4 (approved)HRH1, KCNH2
QuinidineChEMBL + PubChemPhase 4 (approved)KCNH1, KCNH2
ABEMACICLIBChEMBLPhase 4 (approved)HRH1, KCNH2
ACETOPHENAZINEChEMBLPhase 4 (approved)HRH1, KCNH2
AMIODARONEChEMBLPhase 4 (approved)HRH1, KCNH2
AMISULPRIDEChEMBLPhase 4 (approved)HRH1, KCNH2
AMITRIPTYLINEChEMBLPhase 4 (approved)HRH1, KCNH2
AMOXAPINEChEMBLPhase 4 (approved)HRH1, KCNH2
AMSACRINEChEMBLPhase 4 (approved)HRH1, KCNH2
ANTAZOLINEChEMBLPhase 4 (approved)HRH1, KCNH2
APOMORPHINEChEMBLPhase 4 (approved)HRH1, KCNH2
ARIPIPRAZOLEChEMBLPhase 4 (approved)HRH1, KCNH2
ASENAPINEChEMBLPhase 4 (approved)HRH1, KCNH2
ATOMOXETINEChEMBLPhase 4 (approved)HRH1, KCNH2
AZELASTINEChEMBLPhase 4 (approved)HRH1, KCNH2
BENFLUOREXChEMBLPhase 4 (approved)HRH1, KCNH2
BENPERIDOLChEMBLPhase 4 (approved)HRH1, KCNH2
BENZTROPINEChEMBLPhase 4 (approved)HRH1, KCNH2
BEPRIDILChEMBLPhase 4 (approved)HRH1, KCNH2
BIPERIDENChEMBLPhase 4 (approved)HRH1, KCNH2
BROMPERIDOLChEMBLPhase 4 (approved)HRH1, KCNH2
BUCLIZINEChEMBLPhase 4 (approved)HRH1, KCNH2
BUSPIRONEChEMBLPhase 4 (approved)HRH1, KCNH2
BUTRIPTYLINEChEMBLPhase 4 (approved)HRH1, KCNH2
CABERGOLINEChEMBLPhase 4 (approved)HRH1, KCNH2
CARIPRAZINEChEMBLPhase 4 (approved)HRH1, KCNH2
CETIRIZINEChEMBLPhase 4 (approved)HRH1, KCNH2
CHLORPHENIRAMINEChEMBLPhase 4 (approved)HRH1, KCNH2
CINACALCETChEMBLPhase 4 (approved)HRH1, KCNH2
CINNARIZINEChEMBLPhase 4 (approved)HRH1, KCNH2
CISAPRIDEChEMBLPhase 4 (approved)HRH1, KCNH2
CITALOPRAMChEMBLPhase 4 (approved)HRH1, KCNH2
CLEMASTINEChEMBLPhase 4 (approved)HRH1, KCNH2
CLOFAZIMINEChEMBLPhase 4 (approved)HRH1, KCNH2
CLOMIPRAMINEChEMBLPhase 4 (approved)HRH1, KCNH2
CLOTRIMAZOLEChEMBLPhase 4 (approved)HRH1, KCNH2
CLOZAPINEChEMBLPhase 4 (approved)HRH1, KCNH2
CYCLIZINEChEMBLPhase 4 (approved)HRH1, KCNH2
CYCLOBENZAPRINEChEMBLPhase 4 (approved)HRH1, KCNH2
CYPROHEPTADINEChEMBLPhase 4 (approved)HRH1, KCNH2
DEXBROMPHENIRAMINEChEMBLPhase 4 (approved)HRH1, KCNH2
DEXCHLORPHENIRAMINEChEMBLPhase 4 (approved)HRH1, KCNH2
DICYCLOMINEChEMBLPhase 4 (approved)HRH1, KCNH2
DIETHYLPROPIONChEMBLPhase 4 (approved)HRH1, KCNH2
DIPHEMANILChEMBLPhase 4 (approved)HRH1, KCNH2
DIPHENHYDRAMINEChEMBLPhase 4 (approved)HRH1, KCNH2
DOMPERIDONEChEMBLPhase 4 (approved)HRH1, KCNH2