Histamine
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Also known as .beta.-aminoethylglyoxalineErgamineErgotidineNSC-33792SID11111275SID26753351SID26753352SID8139979SID90341171SID104171171SID124880328SID170465001SID144203717[3H]Histamine[3H]-HistamineHistamine dihydrochlorideÊHistamine dihydrochlorideÂ
Summary
Histamine (CHEMBL90) is an approved small-molecule neurotransmitter targeting CA1, HRH1, and HRH2; indicated across 10 conditions including pterygium and osteoarthritis, knee.
At a glance
- Status: Approved (max clinical phase 4)
- Modality: Small molecule
- Targets: 7 (CA1, HRH1, HRH2…)
- Indications: 10 conditions
- Clinical trials: 36
- Chemistry: 111.15 Da · C5H9N3
Identifiers
Drug identity and classification
| Field | Value |
|---|---|
| ChEMBL ID | CHEMBL90 |
| Name | Histamine |
| Type | Small molecule |
| Max phase | 4 |
| FDA approved | yes |
| PubChem CID | 774 |
| ChEBI | CHEBI:18295 |
| Molecular formula | C5H9N3 |
| Molecular weight | 111.15 |
| InChIKey | NTYJJOPFIAHURM-UHFFFAOYSA-N |
SMILES: C1=C(NC=N1)CCN
IUPAC name: 2-(1H-imidazol-5-yl)ethanamine
ChEBI definition: A member of the class of imidazoles that is 1H-imidazole substituted at position C-4 by a 2-aminoethyl group.
Pharmacological roles (ChEBI): neurotransmitter.
Other ChEBI roles (chemical / environmental): human metabolite, mouse metabolite.
Also known as: .beta.-aminoethylglyoxaline, Ergamine, Ergotidine, Histamine, NSC-33792, histamine, SID11111275, SID26753351, SID26753352, SID8139979, SID90341171, SID104171171
Parent form; salt/anhydrous children: CHEMBL544208, CHEMBL535166, CHEMBL1533310, CHEMBL3989520
Patent coverage: 66,050 distinct patent families (169,677 SureChEMBL compound mentions), from 2 matched compound structure(s). One matched structure accounts for 169,200 (100%) 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).
| Gene | Target | Action | pAffinity | Cancer dependency | UniProt |
|---|---|---|---|---|---|
| CA1 | carbonic anhydrase 1 | Activation | 0% | P00915 | |
| HRH1 | H1 receptor | Full agonist | 5.9 | 0% | P35367 |
| HRH2 | H2 receptor | Full agonist | 3.8 | P25021 | |
| HRH3 | H3 receptor | Full agonist | 8.3 | 0.5% | Q9Y5N1 |
| HRH4 | H4 receptor | Full agonist | 8.3 | 0% | Q9H3N8 |
| CA7 | carbonic anhydrase 7 | Activation | 1.6% | P43166 | |
| CA5A | carbonic anhydrase 5A | Activation | 29.6% | P35218 |
Broader ChEMBL bioactivity targets: 17 (assay-derived). Sample: Prelamin-A/C, 4’-phosphopantetheinyl transferase ffp, Histamine H2 receptor, Thyrotropin receptor, Beta-lactamase, Macrophage migration inhibitory factor, Histamine H1 receptor, Histamine H3 receptor, Histamine H2 receptor, Histamine H3 receptor.
Bioactivity
ChEMBL activities: 162 potent at pChembl ≥ 5 of 179 total. Top 30 by potency (10 = 0.1 nM, 6 = 1 µM):
| Target | pChembl | Type | Value | Unit | Activity ID |
|---|---|---|---|---|---|
| Q9JI35 | 9.84 | Ki | 0.14 | nM | CHEMBL_ACT_971259 |
| P31389 | 9.11 | Kd | 0.78 | nM | CHEMBL_ACT_277694 |
| P31389 | 9.11 | Kd | 0.78 | nM | CHEMBL_ACT_681572 |
| P31389 | 9.07 | Kd | 0.85 | nM | CHEMBL_ACT_277690 |
| P31389 | 9.07 | Kd | 0.85 | nM | CHEMBL_ACT_681570 |
| P31389 | 9 | Kd | 1 | nM | CHEMBL_ACT_1148003 |
| HRH4 | 9 | Ki | 1 | nM | CHEMBL_ACT_22485408 |
| P31389 | 9 | Kd | 1 | nM | CHEMBL_ACT_681574 |
| HRH4 | 8.8 | Ki | 1.6 | nM | CHEMBL_ACT_16766681 |
| HRH3 | 8.6 | EC50 | 2.51 | nM | CHEMBL_ACT_19054808 |
| HRH3 | 8.6 | Ki | 2.51 | nM | CHEMBL_ACT_22485425 |
| HRH3 | 8.52 | Kd | 3 | nM | CHEMBL_ACT_24864949 |
| HRH3 | 8.4 | EC50 | 4 | nM | CHEMBL_ACT_22472425 |
| HRH3 | 8.39 | EC50 | 4.07 | nM | CHEMBL_ACT_997564 |
| HRH1 | 8.35 | Kd | 4.5 | nM | CHEMBL_ACT_24864807 |
| HRH4 | 8.32 | Ki | 4.8 | nM | CHEMBL_ACT_15742102 |
| HRH4 | 8.3 | Kd | 5 | nM | CHEMBL_ACT_18972948 |
| HRH3 | 8.3 | EC50 | 5.01 | nM | CHEMBL_ACT_19054887 |
| HRH3 | 8.3 | EC50 | 5.01 | nM | CHEMBL_ACT_5100536 |
| HRH3 | 8.28 | Ki | 5.2 | nM | CHEMBL_ACT_3297785 |
| Q9QYN8 | 8.2 | Ki | 6.31 | nM | CHEMBL_ACT_565755 |
| HRH3 | 8.2 | Ki | 6.31 | nM | CHEMBL_ACT_7956247 |
| HRH4 | 8.13 | EC50 | 7.41 | nM | CHEMBL_ACT_18972952 |
| HRH4 | 8.1 | Ki | 7.94 | nM | CHEMBL_ACT_1454475 |
| HRH4 | 8.1 | Ki | 8 | nM | CHEMBL_ACT_15742107 |
| HRH4 | 8.1 | EC50 | 7.94 | nM | CHEMBL_ACT_16441243 |
| HRH4 | 8.1 | Ki | 7.94 | nM | CHEMBL_ACT_5100496 |
| HRH4 | 8.05 | Ki | 9 | nM | CHEMBL_ACT_7982165 |
| HRH3 | 8.04 | AC50 | 9.1 | nM | CHEMBL_ACT_25199640 |
| HRH4 | 8.04 | EC50 | 9.12 | nM | CHEMBL_ACT_3286686 |
Target pathways
Aggregated over 7 target gene(s): CA1, HRH1, HRH2, HRH3, HRH4, CA7, CA5A.
Top Reactome pathways
16 total, by targets touching each:
| Pathway | Targets | Genes |
|---|---|---|
| Histamine receptors | 4 | HRH1, HRH2, HRH3, HRH4 |
| Metabolism | 3 | CA1, CA5A, CA7 |
| Reversible hydration of carbon dioxide | 3 | CA1, CA5A, CA7 |
| Erythrocytes take up carbon dioxide and release oxygen | 1 | CA1 |
| Erythrocytes take up oxygen and release carbon dioxide | 1 | CA1 |
| Cytokine Signaling in Immune system | 1 | CA1 |
| O2/CO2 exchange in erythrocytes | 1 | CA1 |
| Immune System | 1 | CA1 |
| Transport of small molecules | 1 | CA1 |
| G alpha (q) signalling events | 1 | HRH1 |
| G alpha (s) signalling events | 1 | HRH2 |
| G alpha (i) signalling events | 1 | HRH4 |
| Interleukin-12 family signaling | 1 | CA1 |
| Signaling by Interleukins | 1 | CA1 |
| Gene and protein expression by JAK-STAT signaling after Interleukin-12 stimulation | 1 | CA1 |
| Interleukin-12 signaling | 1 | CA1 |
Dominant GO biological processes
| GO term | Targets |
|---|---|
| G protein-coupled receptor signaling pathway | 4 |
| G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger | 4 |
| chemical synaptic transmission | 4 |
| signal transduction | 4 |
| inflammatory response | 2 |
| positive regulation of vasoconstriction | 2 |
| adenylate cyclase-activating G protein-coupled receptor signaling pathway | 2 |
| adenylate cyclase-inhibiting G protein-coupled acetylcholine receptor signaling pathway | 2 |
| response to fructose | 1 |
| phospholipase C-activating G protein-coupled receptor signaling pathway | 1 |
| memory | 1 |
| visual learning | 1 |
| regulation of vascular permeability | 1 |
| regulation of synaptic plasticity | 1 |
| cellular response to histamine | 1 |
Indications & clinical
Indications
10 indications (0 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).
| Indication | Trial phase | MONDO | EFO |
|---|---|---|---|
| pterygium | 3 | MONDO:0005085 | EFO:0000678 |
| osteoarthritis, knee | 3 | MONDO:0005416 | EFO:0004616 |
| non-Hodgkin lymphoma | 3 | MONDO:0018908 | EFO:0005952 |
| seasonal allergic rhinitis | 2 | MONDO:0005324 | EFO:0003956 |
| allergic rhinitis | 2 | MONDO:0011786 | EFO:0005854 |
| multiple sclerosis | 2 | MONDO:0005301 | MONDO:0005301 |
| asthma | 1 | MONDO:0004979 | MONDO:0004979 |
| allergic disease | 0 | MONDO:0005271 | MONDO:0005271 |
2 further indication records had no mapped disease name (EFO/MeSH-only) or were duplicates, and are omitted.
Clinical trials
Total trials: 36.
Phase distribution
| Phase | Trials |
|---|---|
| Not specified | 29 |
| PHASE2 | 4 |
| PHASE1 | 2 |
| PHASE3 | 1 |
Top trials by phase / activity
| NCT | Phase | Status | Title |
|---|---|---|---|
| NCT01112722 | PHASE3 | COMPLETED | Apitox, Honeybee Toxin for Pain and Inflammation of Osteoarthritis |
| NCT00387738 | PHASE2 | TERMINATED | Efficacy and Safety Study of TOLAMBA™ in Ragweed-Allergic Adults |
| NCT00537355 | PHASE2 | COMPLETED | An Evaluation of the Efficacy and Safety of TOLAMBA™ for Ragweed-Allergic Rhinitis in an Environmental Exposure Chamber |
| NCT00630383 | PHASE2 | WITHDRAWN | Immunoregulation by Controlled Parasite Exposure in Multiple Sclerosis. |
| NCT01689363 | PHASE2 | COMPLETED | Evaluation of the Allergenicity of AMPHADASE INJECTION (Hyaluronidase Injection USP) |
| NCT01719133 | PHASE1 | COMPLETED | Skin Prick Tests With AllerT in Subjects Allergic to Birch Pollen |
| NCT01925729 | PHASE1 | COMPLETED | TransMEM Gas Exchange – Project 1, Aim 2 |
| NCT06081946 | Not specified | RECRUITING | Investigation of the Effects of Sleep Fragmentation on Itch and Pain Sensitivity |
| NCT06081998 | Not specified | RECRUITING | Investigation of the Effects of Sleep Deprivation on Itch and Pain Sensitivity |
| NCT06328530 | Not specified | RECRUITING | Itch Sensation Induced by Simultaneous Application of Pruritogens (Spatial Summation) |
| NCT06328543 | Not specified | RECRUITING | Itch Sensation Induced by Multiple Applications of Pruritogens (temporal Summation) |
| NCT06340438 | Not specified | RECRUITING | Investigate the Relationship Between Catastrophizing and the Perception of Itch Intensity in Healthy Individuals |
| NCT06503510 | Not specified | RECRUITING | Role of Interleukin-13 Pathways on Pain and Itch Sensitivity |
| NCT06503523 | Not specified | RECRUITING | The Effects of Performing a Motor Imagery Task on Cortical Excitability During Acute Experimental Muscle Pain and Acute Itch |
| NCT07122973 | Not specified | RECRUITING | Topographical Distribution of Itch and Pain Receptors |
| NCT07247695 | Not specified | RECRUITING | Mechanisms Underlying the Placebo Effect in Both Histaminergic and Non-histaminergic Itch |
| NCT07255092 | Not specified | NOT_YET_RECRUITING | Mechanisms Underlying the Nocibo Effect of Contagious Itch. in Both Histaminergic and Nonhistaminergic Itch |
| NCT07395882 | Not specified | NOT_YET_RECRUITING | A New Model to Induce Itch and Inflammation |
| NCT00795496 | Not specified | COMPLETED | Bronchial Hyperreactivity in Atopic Dermatitis Patients - a 10 Year Follow-up |
| NCT01777464 | Not specified | TERMINATED | Role of the Central Nervous System in Allergic Rhinitis |
| NCT01963741 | Not specified | COMPLETED | Leukotriene D4 Nasal Provocation Test in Allergic Rhinitis |
| NCT03576053 | Not specified | COMPLETED | A Mechanistic Evaluation of the Interactions Between Thermoceptive and Pruriceptive Sensory Processing |
| NCT03587220 | Not specified | COMPLETED | A Mechanistic Evaluation of the Nociceptive Desensitizing Properties of Topical Capsaicin |
| NCT03943407 | Not specified | WITHDRAWN | Characterization of the Toll-like Receptor 7-agonist Imiquimod 3.75% As a New Surrogate Model of Itch |
| NCT04058054 | Not specified | COMPLETED | Skin Prick Test of KeraStat® Cream |
| NCT04115462 | Not specified | COMPLETED | A Relation of Morphine-induced Itch and Pain Processing |
| NCT04396977 | Not specified | COMPLETED | Inter-arm and Inter-period Reproducability of the Dermal Blood Flow Response After a Histamine Skin Prick. |
| NCT04554888 | Not specified | COMPLETED | Characterization of New Human Models of Non-histaminergic Itch and Their Interaction With the TRPM8 Receptor |
| NCT04588532 | Not specified | COMPLETED | Characterization of BAM8-22 as a New Surrogate Model of Non-histaminergic Itch |
| NCT04635254 | Not specified | COMPLETED | The Effect of Halophyte-based Cream on Pain and Itch |
| NCT04676763 | Not specified | COMPLETED | Substance P Challenge in Healthy Participants |
| NCT04700007 | Not specified | COMPLETED | Evaluation of Peripheral Itch Mechanisms Following Injection of Morphine (Second Sub-Project) |
| NCT04711044 | Not specified | COMPLETED | Investigation of a New Human Model for Itch |
| NCT06154824 | Not specified | COMPLETED | Repetitive Applications of Pruritogens and Effects of a Cutaneous-induced Pain Stimulation on Nonhistaminergic Itch Perception |
| NCT06245564 | Not specified | COMPLETED | Effect of Ketamine, Amitriptyline and Their Combination on Itch |
| NCT06470737 | Not specified | COMPLETED | Investigation of Corticospinal Excitability Aspects of Itch and Pain |
Clinical evidence (CIViC)
No CIViC predictive evidence (expected for non-precision-medicine drugs).
Pharmacology
Pharmacogenomics
No PharmGKB pharmacogenomic data curated for this drug.
Related molecules
Related molecules
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.
558 molecules share ≥1 primary target. Top 60 by shared-target count:
| Molecule | Source | Status | Shared targets |
|---|---|---|---|
| CLOZAPINE | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3, HRH4 |
| PIMOZIDE | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3, HRH4 |
| ASTEMIZOLE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3, HRH4 |
| FAMOTIDINE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7, HRH2 |
| IMATINIB | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7, HRH2 |
| VERALIPRIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7, HRH3 |
| GSK-1004723 | ChEMBL | Phase 2 | HRH1, HRH2, HRH3, HRH4 |
| ACETAMINOPHEN | ChEMBL + PubChem | Phase 4 (approved) | CA1, CA5A, CA7 |
| ACETAZOLAMIDE | ChEMBL + PubChem | Phase 4 (approved) | CA1, CA5A, CA7 |
| ACLIDINIUM BROMIDE | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| DESLORATADINE | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH4 |
| DIHYDROERGOTAMINE | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| Gefitinib | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| Linagliptin | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| PRAMIPEXOLE | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH4 |
| Propoxyphene | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| RIFAMPIN | ChEMBL + PubChem | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| Rufinamide | ChEMBL + PubChem | Phase 4 (approved) | CA5A, HRH1, HRH2 |
| AMIODARONE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| AMITRIPTYLINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| ARIPIPRAZOLE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| BORTEZOMIB | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| BRINZOLAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| CELECOXIB | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| CHLORPHENIRAMINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| CHLORTHALIDONE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| CLEMASTINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| CLOMIPRAMINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| COUMARIN | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| DEXCHLORPHENIRAMINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| DICHLORPHENAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| DIPHENHYDRAMINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH4 |
| DOBUTAMINE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| DORZOLAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| DYCLONINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| ETHOXZOLAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| FLUOXETINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| FUROSEMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| INDAPAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| INDOCYANINE GREEN ACID FORM | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| IPRINDOLE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| KETOTIFEN | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH4 |
| LACOSAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| LEVETIRACETAM | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| LOXAPINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH4 |
| MAFENIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| METHAZOLAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| NILOTINIB | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| RISPERIDONE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| SULFANILAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| SULOCTIDIL | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| SULPIRIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| TETRACAINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| TOPIRAMATE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| TRICHLORMETHIAZIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| TRIENTINE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| TRIFLUOPERAZINE | ChEMBL | Phase 4 (approved) | HRH1, HRH2, HRH3 |
| VALDECOXIB | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| ZONISAMIDE | ChEMBL | Phase 4 (approved) | CA1, CA5A, CA7 |
| CAFFEIC ACID | ChEMBL | Phase 3 | CA1, CA5A, CA7 |
Related Atlas pages
- Genes: CA1, HRH1, HRH2, HRH3, HRH4, CA7, CA5A
- Diseases: pterygium, osteoarthritis, knee, non-Hodgkin lymphoma
- Drugs: Clozapine, Pimozide, Astemizole, Famotidine, Imatinib, Veralipride, Acetaminophen, Acetazolamide, Aclidinium Bromide, Desloratadine, Dihydroergotamine, Gefitinib, Linagliptin, Pramipexole, Propoxyphene, Rifampin, Rufinamide, Amiodarone, Amitriptyline, Aripiprazole, Bortezomib, Brinzolamide, Celecoxib, Chlorpheniramine, Chlorthalidone, Clemastine, Clomipramine, Dichlorphenamide, Diphenhydramine, Dobutamine, Dorzolamide, Dyclonine, Ethoxzolamide, Fluoxetine, Furosemide, Indapamide, Indocyanine Green Acid Form, Iprindole, Ketotifen, Lacosamide, Levetiracetam, Loxapine, Mafenide, Methazolamide, Nilotinib, Risperidone, Sulfanilamide, Suloctidil, Sulpiride, Tetracaine, Topiramate, Trichlormethiazide, Trientine, Trifluoperazine, Valdecoxib, Zonisamide, Caffeic Acid