Tacrine
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Also known as TacrinaTacrinalTHASID11110734SID11113824SID26755281SID90341647Tacrine (THA)tetrahydroaminoacridineSID104171104SID124879172SID124879174SID144203624SID144212594SID170465420
Summary
Tacrine (CHEMBL95) is an approved small-molecule EC 3.1.1.7 (acetylcholinesterase) inhibitor (ATC N06DA01) targeting CHRM1, CHRM2, and ACHE; indicated across 2 conditions including dementia and cocaine dependence.
At a glance
- Status: Approved (max clinical phase 4)
- Modality: Small molecule
- ATC class: N06DA01
- Targets: 4 (CHRM1, CHRM2, ACHE…)
- Indications: 2 conditions
- Clinical trials: 8
- Chemistry: 198.26 Da · C13H14N2
Identifiers
Drug identity and classification
| Field | Value |
|---|---|
| ChEMBL ID | CHEMBL95 |
| Name | Tacrine |
| Type | Small molecule |
| Max phase | 4 |
| FDA approved | no |
| PubChem CID | 1935 |
| ChEBI | CHEBI:45980 |
| ATC | N06DA01 |
| Molecular formula | C13H14N2 |
| Molecular weight | 198.26 |
| InChIKey | YLJREFDVOIBQDA-UHFFFAOYSA-N |
SMILES: C1CCC2=NC3=CC=CC=C3C(=C2C1)N
IUPAC name: 1,2,3,4-tetrahydroacridin-9-amine
ChEBI definition: A member of the class of acridines that is 1,2,3,4-tetrahydroacridine substituted by an amino group at position 9. It is used in the treatment of Alzheimer’s disease.
Pharmacological roles (ChEBI): EC 3.1.1.7 (acetylcholinesterase) inhibitor.
Also known as: Tacrina, Tacrinal, Tacrine, tacrine, THA, SID11110734, SID11113824, SID26755281, SID90341647, Tacrine (THA), tetrahydroaminoacridine, SID104171104
Parent form; salt/anhydrous children: CHEMBL1677, CHEMBL1337960, CHEMBL6170062
Patent coverage: 9,855 distinct patent families (35,360 SureChEMBL compound mentions), from 4 matched compound structure(s). One matched structure accounts for 35,182 (99%) 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 |
|---|---|---|---|---|---|
| CHRM1 | M1 receptor | Negative | 5.7 | 0.2% | P11229 |
| CHRM2 | M2 receptor | Negative | 5.68 | 0% | P08172 |
| ACHE | acetylcholinesterase (Yt blood group) | Inhibition | 7.5 | 9.6% | P22303 |
| BCHE | butyrylcholinesterase | Inhibition | 7.2 | 0.1% | P06276 |
Broader ChEMBL bioactivity targets: 56 (assay-derived). Sample: Lysine-specific demethylase 4E, Nuclear receptor ROR-gamma, Solute carrier family 22 member 2, Multidrug and toxin extrusion protein 1, ATP-binding cassette sub-family C member 4, Alpha-2A adrenergic receptor, Glutamate NMDA receptor; GRIN1/GRIN2B, Glutamate NMDA receptor; GRIN1/GRIN2A, Muscarinic acetylcholine receptor, Cholinesterase.
Bioactivity
ChEMBL activities: 787 potent at pChembl ≥ 5 of 834 total. Top 30 by potency (10 = 0.1 nM, 6 = 1 µM):
| Target | pChembl | Type | Value | Unit | Activity ID |
|---|---|---|---|---|---|
| BCHE | 10.57 | IC50 | 0.03 | nM | CHEMBL_ACT_6310259 |
| P32738 | 9.82 | Ki | 0.15 | nM | CHEMBL_ACT_133995 |
| BCHE | 9.05 | IC50 | 0.9 | nM | CHEMBL_ACT_122888 |
| P81908 | 8.92 | IC50 | 1.2 | nM | CHEMBL_ACT_16800979 |
| P81908 | 8.81 | IC50 | 1.53 | nM | CHEMBL_ACT_19140502 |
| O42275 | 8.73 | IC50 | 1.87 | nM | CHEMBL_ACT_24869269 |
| P81908 | 8.72 | IC50 | 1.9 | nM | CHEMBL_ACT_25523603 |
| P81908 | 8.7 | IC50 | 2 | nM | CHEMBL_ACT_15169054 |
| P81908 | 8.7 | IC50 | 2 | nM | CHEMBL_ACT_15219522 |
| O42275 | 8.7 | IC50 | 2 | nM | CHEMBL_ACT_16513339 |
| P81908 | 8.7 | IC50 | 2 | nM | CHEMBL_ACT_16831072 |
| P81908 | 8.7 | IC50 | 2 | nM | CHEMBL_ACT_16850308 |
| P81908 | 8.7 | IC50 | 2 | nM | CHEMBL_ACT_19411123 |
| P81908 | 8.7 | IC50 | 2 | nM | CHEMBL_ACT_23250667 |
| P81908 | 8.61 | IC50 | 2.43 | nM | CHEMBL_ACT_14531382 |
| P81908 | 8.57 | IC50 | 2.69 | nM | CHEMBL_ACT_18718815 |
| BCHE | 8.52 | IC50 | 3 | nM | CHEMBL_ACT_25580668 |
| P81908 | 8.52 | IC50 | 3 | nM | CHEMBL_ACT_26116143 |
| ACHE | 8.5 | IC50 | 3.16 | nM | CHEMBL_ACT_6310255 |
| P81908 | 8.49 | IC50 | 3.2 | nM | CHEMBL_ACT_12185055 |
| P81908 | 8.49 | IC50 | 3.2 | nM | CHEMBL_ACT_18061001 |
| P81908 | 8.49 | IC50 | 3.2 | nM | CHEMBL_ACT_18385738 |
| P81908 | 8.48 | IC50 | 3.3 | nM | CHEMBL_ACT_14593920 |
| P81908 | 8.44 | IC50 | 3.66 | nM | CHEMBL_ACT_15016799 |
| P81908 | 8.43 | IC50 | 3.7 | nM | CHEMBL_ACT_15012389 |
| P81908 | 8.42 | IC50 | 3.8 | nM | CHEMBL_ACT_10898304 |
| P81908 | 8.42 | IC50 | 3.8 | nM | CHEMBL_ACT_12070526 |
| P81908 | 8.41 | IC50 | 3.9 | nM | CHEMBL_ACT_26034571 |
| P81908 | 8.4 | IC50 | 4 | nM | CHEMBL_ACT_14746351 |
| P81908 | 8.4 | IC50 | 4 | nM | CHEMBL_ACT_15042285 |
Target pathways
Aggregated over 4 target gene(s): CHRM1, CHRM2, ACHE, BCHE.
Top Reactome pathways
25 total, by targets touching each:
| Pathway | Targets | Genes |
|---|---|---|
| Neurotransmitter clearance | 2 | ACHE, BCHE |
| Synthesis of PC | 2 | ACHE, BCHE |
| Signal Transduction | 2 | CHRM1, CHRM2 |
| Signaling by GPCR | 2 | CHRM1, CHRM2 |
| Class A/1 (Rhodopsin-like receptors) | 2 | CHRM1, CHRM2 |
| Amine ligand-binding receptors | 2 | CHRM1, CHRM2 |
| GPCR downstream signalling | 2 | CHRM1, CHRM2 |
| Muscarinic acetylcholine receptors | 2 | CHRM1, CHRM2 |
| Synthesis, secretion, and deacylation of Ghrelin | 2 | ACHE, BCHE |
| GPCR ligand binding | 2 | CHRM1, CHRM2 |
| Transmission across Chemical Synapses | 1 | ACHE |
| Neuronal System | 1 | ACHE |
| Metabolism | 1 | ACHE |
| Glycerophospholipid biosynthesis | 1 | ACHE |
| Phospholipid metabolism | 1 | ACHE |
| Membrane Trafficking | 1 | CHRM2 |
| Peptide hormone metabolism | 1 | ACHE |
| Metabolism of proteins | 1 | ACHE |
| G alpha (q) signalling events | 1 | CHRM1 |
| G alpha (i) signalling events | 1 | CHRM2 |
| Metabolism of lipids | 1 | ACHE |
| Vesicle-mediated transport | 1 | CHRM2 |
| Cargo recognition for clathrin-mediated endocytosis | 1 | CHRM2 |
| Clathrin-mediated endocytosis | 1 | CHRM2 |
| Aspirin ADME | 1 | BCHE |
Dominant GO biological processes
| GO term | Targets |
|---|---|
| nervous system development | 3 |
| signal transduction | 2 |
| G protein-coupled receptor signaling pathway | 2 |
| G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger | 2 |
| adenylate cyclase-inhibiting G protein-coupled acetylcholine receptor signaling pathway | 2 |
| phospholipase C-activating G protein-coupled acetylcholine receptor signaling pathway | 2 |
| G protein-coupled acetylcholine receptor signaling pathway | 2 |
| chemical synaptic transmission | 2 |
| acetylcholine receptor signaling pathway | 2 |
| acetylcholine catabolic process | 2 |
| phospholipase C-activating G protein-coupled receptor signaling pathway | 1 |
| neuromuscular synaptic transmission | 1 |
| regulation of locomotion | 1 |
| positive regulation of monoatomic ion transport | 1 |
| saliva secretion | 1 |
Indications & clinical
Indications
2 indications (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).
| Indication | Trial phase | MONDO | EFO |
|---|---|---|---|
| dementia | 4 | MONDO:0001627 | HP:0000726 |
| cocaine dependence | 2 | MONDO:0005186 | EFO:0002610 |
Clinical trials
Total trials: 8.
Phase distribution
| Phase | Trials |
|---|---|
| Not specified | 5 |
| PHASE4 | 2 |
| PHASE2 | 1 |
Top trials by phase / activity
| NCT | Phase | Status | Title |
|---|---|---|---|
| NCT02405104 | PHASE4 | COMPLETED | Chlorzoxazone in Hip and Knee Arthroplasty |
| NCT04516239 | PHASE4 | COMPLETED | Comparison of Metal on Metal Total Hip Arthroplasty and Metal on Metal Total Hip Resurfacing. |
| NCT01406522 | PHASE2 | WITHDRAWN | Tacrine Effects on Cocaine Self-Administration and Pharmacokinetics |
| NCT00374946 | Not specified | COMPLETED | A Clinical Evaluation of Wear Couples in THA |
| NCT03859791 | Not specified | UNKNOWN | True Incidence of Hip Dislocation After Primary THA - a Nationwide Population Study |
| NCT04070989 | Not specified | TERMINATED | Pinnacle RSA Study |
| NCT04637958 | Not specified | COMPLETED | Correlation Between Femoral Head and Cup Size and Postoperative Pain in Total Hip Arthroplasty |
| NCT05892523 | Not specified | UNKNOWN | Influence of Spinal Deformity on THA |
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.
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.
617 molecules share ≥1 primary target. Top 60 by shared-target count:
| Molecule | Source | Status | Shared targets |
|---|---|---|---|
| DONEPEZIL | ChEMBL | Phase 4 (approved) | ACHE, BCHE, CHRM1, CHRM2 |
| ETHOPROPAZINE | ChEMBL | Phase 4 (approved) | ACHE, BCHE, CHRM1, CHRM2 |
| chenodiol | ChEMBL + PubChem | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| GENTIAN VIOLET | ChEMBL + PubChem | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| PIMAVANSERIN | ChEMBL + PubChem | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| Tadalafil | ChEMBL + PubChem | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| VORAPAXAR | ChEMBL + PubChem | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| ARIPIPRAZOLE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| BROMOCRIPTINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| CITALOPRAM | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| CLOTRIMAZOLE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| DEQUALINIUM | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| DIETHYLSTILBESTROL | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| EBASTINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| ECONAZOLE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| EPIRUBICIN | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| FLAVOXATE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| FLUOXETINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| GALLAMINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| HEXAFLUORENIUM | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| ILOPERIDONE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| MELPHALAN | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| MICONAZOLE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| NICERGOLINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| OXICONAZOLE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| PALBOCICLIB | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| PERICIAZINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| QUINACRINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| RANITIDINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| RISPERIDONE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| SERTACONAZOLE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| SUNITINIB | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| TERCONAZOLE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| TRIMETREXATE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| XANOMELINE | ChEMBL | Phase 4 (approved) | ACHE, CHRM1, CHRM2 |
| BISANTRENE | ChEMBL | Phase 3 | ACHE, CHRM1, CHRM2 |
| CETYLPYRIDINIUM | ChEMBL | Phase 3 | ACHE, CHRM1, CHRM2 |
| DROTAVERINE | ChEMBL | Phase 3 | ACHE, CHRM1, CHRM2 |
| QUERCETIN | ChEMBL | Phase 3 | ACHE, BCHE, CHRM2 |
| AMINACRINE | ChEMBL | Phase 2 | ACHE, CHRM1, CHRM2 |
| BENZETHONIUM | ChEMBL | Phase 2 | ACHE, CHRM1, CHRM2 |
| BENZETHONIUM CHLORIDE | ChEMBL | Phase 2 | ACHE, CHRM1, CHRM2 |
| METERGOLINE | ChEMBL | Phase 2 | ACHE, CHRM1, CHRM2 |
| SETASTINE | ChEMBL | Phase 2 | ACHE, CHRM1, CHRM2 |
| THIOPROPERAZINE | ChEMBL | Phase 2 | ACHE, CHRM1, CHRM2 |
| ZOTEPINE | ChEMBL | Phase 2 | ACHE, CHRM1, CHRM2 |
| Binimetinib | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Echothiophate | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Imipenem | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| levocarnitine | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Perindopril | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| podofilox | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Propylene Glycol | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Pyrazinamide | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Pyridoxine | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Quinaprilat | PubChem | Approved | ACHE, CHRM1, CHRM2 |
| Afatinib | ChEMBL + PubChem | Phase 4 (approved) | CHRM1, CHRM2 |
| LINAGLIPTIN | ChEMBL + PubChem | Phase 4 (approved) | CHRM1, CHRM2 |
| Mavorixafor | ChEMBL + PubChem | Phase 4 (approved) | CHRM1, CHRM2 |
| ACETYLCHOLINE | ChEMBL | Phase 4 (approved) | CHRM1, CHRM2 |
Related Atlas pages
- Genes: CHRM1, CHRM2, ACHE, BCHE
- Diseases: dementia
- Drugs: Donepezil, Ethopropazine, chenodiol, Pimavanserin, Tadalafil, Vorapaxar, Aripiprazole, Bromocriptine, Citalopram, Clotrimazole, Dequalinium, Diethylstilbestrol, Ebastine, Econazole, Epirubicin, Flavoxate, Fluoxetine, Gallamine, Hexafluorenium, Iloperidone, Melphalan, Miconazole, Nicergoline, Oxiconazole, Palbociclib, Periciazine, Quinacrine, Ranitidine, Risperidone, Sertaconazole, Sunitinib, Terconazole, Trimetrexate, Xanomeline, Bisantrene, Cetylpyridinium, Drotaverine, Quercetin, Binimetinib, Echothiophate, Imipenem, levocarnitine, Perindopril, podofilox, Propylene Glycol, Pyrazinamide, Pyridoxine, Afatinib, Linagliptin, Mavorixafor, Acetylcholine