Details
Stereochemistry | ABSOLUTE |
Molecular Formula | C17H21NO3.ClH |
Molecular Weight | 323.814 |
Optical Activity | ( - ) |
Defined Stereocenters | 3 / 3 |
E/Z Centers | 0 |
Charge | 0 |
SHOW SMILES / InChI
SMILES
Cl.COC1=C2O[C@H]3C[C@@H](O)C=C[C@]34CCN(C)CC(C=C1)=C24
InChI
InChIKey=USUHXXKCHSBMOS-XPSHAMGMSA-N
InChI=1S/C17H21NO3.ClH/c1-18-8-7-17-6-5-12(19)9-14(17)21-16-13(20-2)4-3-11(10-18)15(16)17;/h3-6,12,14,19H,7-10H2,1-2H3;1H/t12-,14-,17-;/m0./s1
Molecular Formula | ClH |
Molecular Weight | 36.461 |
Charge | 0 |
Count |
|
Stereochemistry | ACHIRAL |
Additional Stereochemistry | No |
Defined Stereocenters | 0 / 0 |
E/Z Centers | 0 |
Optical Activity | NONE |
Molecular Formula | C17H21NO3 |
Molecular Weight | 287.3535 |
Charge | 0 |
Count |
|
Stereochemistry | ABSOLUTE |
Additional Stereochemistry | No |
Defined Stereocenters | 3 / 3 |
E/Z Centers | 0 |
Optical Activity | UNSPECIFIED |
DescriptionSources: http://www.accessdata.fda.gov/drugsatfda_docs/label/2015/021169s031-021224s029-021615s022lbl.pdfCurator's Comment: description was created based on several sources, including
https://www.ncbi.nlm.nih.gov/mesh/68005702 |
https://www.ncbi.nlm.nih.gov/pubmed/12177686
Sources: http://www.accessdata.fda.gov/drugsatfda_docs/label/2015/021169s031-021224s029-021615s022lbl.pdf
Curator's Comment: description was created based on several sources, including
https://www.ncbi.nlm.nih.gov/mesh/68005702 |
https://www.ncbi.nlm.nih.gov/pubmed/12177686
Galantamine (RAZADYNE®, galantamine hydrobromide) is a benzazepine derived from norbelladine. It is found in Galanthus and other Amaryllidaceae. It is a reversible, competitive acetylcholinesterase inhibitor that is used for the treatment of mild to moderate dementia of the Alzheimer’s type. Although the etiology of cognitive impairment in Alzheimer’s disease is not fully understood, it has been reported that acetylcholine-producing neurons degenerate in the brains of patients with Alzheimer’s disease. The degree of this cholinergic loss has been correlated with degree of cognitive impairment and density of amyloid plaques (a neuropathological hallmark of Alzheimer’s disease). While the precise mechanism of galantamine’s (RAZADYNE®, galantamine hydrobromide) action is unknown, it is postulated to exert its therapeutic effect by enhancing cholinergic function. This is accomplished by increasing the concentration of acetylcholine through reversible inhibition of its hydrolysis by acetylcholinesterase. If this mechanism is correct, galantamine’s (RAZADYNE®, galantamine hydrobromide) effect may lessen as the disease process advances and fewer cholinergic neurons remain functionally intact. There is no evidence that galantamine (RAZADYNE®, galantamine hydrobromide) alters the course of the underlying dementing process.
CNS Activity
Originator
Sources: https://www.ncbi.nlm.nih.gov/pubmed/12177686
Curator's Comment: # Janssen Pharmaceuticals, a division of Ortho-McNeil-Jannsen Pharmaceuticals
Approval Year
Targets
Primary Target | Pharmacology | Condition | Potency |
---|---|---|---|
Target ID: CHEMBL220 |
0.35 µM [IC50] |
Conditions
Condition | Modality | Targets | Highest Phase | Product |
---|---|---|---|---|
Palliative | RAZADYNE Approved UseGalantamine hydrobromide is a cholinesterase inhibitor indicated for the treatment of mild to moderate dementia of the Alzheimer’s type. Launch Date2001 |
Cmax
Value | Dose | Co-administered | Analyte | Population |
---|---|---|---|---|
84.3 ng/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/16238894 |
24 mg single, oral dose: 24 mg route of administration: Oral experiment type: SINGLE co-administered: |
GALANTAMINE plasma | Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED |
AUC
Value | Dose | Co-administered | Analyte | Population |
---|---|---|---|---|
1050 ng × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/16238894 |
24 mg single, oral dose: 24 mg route of administration: Oral experiment type: SINGLE co-administered: |
GALANTAMINE plasma | Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED |
T1/2
Value | Dose | Co-administered | Analyte | Population |
---|---|---|---|---|
8.53 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/16238894 |
24 mg single, oral dose: 24 mg route of administration: Oral experiment type: SINGLE co-administered: |
GALANTAMINE plasma | Homo sapiens population: HEALTHY age: ADULT sex: MALE food status: FASTED |
Funbound
Value | Dose | Co-administered | Analyte | Population |
---|---|---|---|---|
82% |
GALANTAMINE plasma | Homo sapiens population: UNKNOWN age: UNKNOWN sex: UNKNOWN food status: UNKNOWN |
Doses
Dose | Population | Adverse events |
---|---|---|
8 mg 2 times / day steady, oral Dose: 8 mg, 2 times / day Route: oral Route: steady Dose: 8 mg, 2 times / day Sources: |
unhealthy, 90 years |
Disc. AE: Nightmares... AEs leading to discontinuation/dose reduction: Nightmares (1 patient) Sources: |
32 mg 1 times / day steady, oral Highest studied dose Dose: 32 mg, 1 times / day Route: oral Route: steady Dose: 32 mg, 1 times / day Sources: |
unhealthy, adult Health Status: unhealthy Age Group: adult Sex: unknown Sources: |
Other AEs: Nausea, Vomiting... Other AEs: Nausea (42%) Sources: Vomiting (21%) Diarrhea (16%) Anorexia (15%) Weight loss (8%) Dizziness (15%) |
AEs
AE | Significance | Dose | Population |
---|---|---|---|
Nightmares | 1 patient Disc. AE |
8 mg 2 times / day steady, oral Dose: 8 mg, 2 times / day Route: oral Route: steady Dose: 8 mg, 2 times / day Sources: |
unhealthy, 90 years |
Anorexia | 15% | 32 mg 1 times / day steady, oral Highest studied dose Dose: 32 mg, 1 times / day Route: oral Route: steady Dose: 32 mg, 1 times / day Sources: |
unhealthy, adult Health Status: unhealthy Age Group: adult Sex: unknown Sources: |
Dizziness | 15% | 32 mg 1 times / day steady, oral Highest studied dose Dose: 32 mg, 1 times / day Route: oral Route: steady Dose: 32 mg, 1 times / day Sources: |
unhealthy, adult Health Status: unhealthy Age Group: adult Sex: unknown Sources: |
Diarrhea | 16% | 32 mg 1 times / day steady, oral Highest studied dose Dose: 32 mg, 1 times / day Route: oral Route: steady Dose: 32 mg, 1 times / day Sources: |
unhealthy, adult Health Status: unhealthy Age Group: adult Sex: unknown Sources: |
Vomiting | 21% | 32 mg 1 times / day steady, oral Highest studied dose Dose: 32 mg, 1 times / day Route: oral Route: steady Dose: 32 mg, 1 times / day Sources: |
unhealthy, adult Health Status: unhealthy Age Group: adult Sex: unknown Sources: |
Nausea | 42% | 32 mg 1 times / day steady, oral Highest studied dose Dose: 32 mg, 1 times / day Route: oral Route: steady Dose: 32 mg, 1 times / day Sources: |
unhealthy, adult Health Status: unhealthy Age Group: adult Sex: unknown Sources: |
Weight loss | 8% | 32 mg 1 times / day steady, oral Highest studied dose Dose: 32 mg, 1 times / day Route: oral Route: steady Dose: 32 mg, 1 times / day Sources: |
unhealthy, adult Health Status: unhealthy Age Group: adult Sex: unknown Sources: |
Overview
CYP3A4 | CYP2C9 | CYP2D6 | hERG |
---|---|---|---|
OverviewOther
Other Inhibitor | Other Substrate | Other Inducer |
---|---|---|
Drug as perpetrator
Target | Modality | Activity | Metabolite | Clinical evidence |
---|---|---|---|---|
inconclusive [Activation 15.8489 uM] | ||||
no [IC50 >10 uM] | ||||
no [IC50 >10 uM] | ||||
no [IC50 >10 uM] | ||||
no [IC50 >10 uM] | ||||
no [IC50 >10 uM] | ||||
no [IC50 >10 uM] | ||||
no [IC50 >133 uM] | ||||
no [IC50 >133 uM] | ||||
no [IC50 >133 uM] | ||||
no [IC50 >133 uM] | ||||
no | ||||
no | ||||
no | ||||
Page: 4, 20, (ClinPharm) 34, 38-39 |
no | no (co-administration study) Comment: Coadministration of Galantamine (multiple doses) had no effect on the pharmacokinetics of R-/S-Warfarin (CYP2C9 substrate) Page: 4, 20, (ClinPharm) 34, 38-39 |
||
yes [IC50 0.6 uM] | no (co-administration study) Comment: Coadministration of Galantamine (multiple doses) had no effect on the pharmacokinetics of Digoxin (P-gp substrate) Page: 4, 20, (ClinPharm) 38, 40 |
Drug as victim
Target | Modality | Activity | Metabolite | Clinical evidence |
---|---|---|---|---|
Page: 2, 4, 19-20, (ClinPharm) 15, 38, 42-23, 45 |
major [Km 187 uM] | yes (co-administration study) Comment: Vmax = 5.2 nmol/mg protein/h (Pharmacogenetics, 9, 661 (1999)); Coadministration (multiple doses) of ketoconazole (strong CYP3A4 inhibitor, CYP2D6 inhibitor) and paroxetin (strong CYP2D6 inhibitor) increased Galantamine AUC by 30% and 40%. Page: 2, 4, 19-20, (ClinPharm) 15, 38, 42-23, 45 |
||
Page: 2, 4, 19-20, (ClinPharm) 15, 38, 42-44 |
major | yes (co-administration study) Comment: Coadministration (multiple doses) of ketoconazole (strong CYP3A4 inhibitor, CYP2D6 inhibitor) increased Galantamine AUC by 30%. Coadministration of erythromycin (moderate CYP3A4 inhibitor) increased Galantamine AUC by only 10%. Page: 2, 4, 19-20, (ClinPharm) 15, 38, 42-44 |
||
yes |
Tox targets
Target | Modality | Activity | Metabolite | Clinical evidence |
---|---|---|---|---|
PubMed
Title | Date | PubMed |
---|---|---|
Accurate prediction of the bound conformation of galanthamine in the active site of Torpedo californica acetylcholinesterase using molecular docking. | 2001 |
|
Pharmacokinetic rationale for switching from donepezil to galantamine. | 2001 |
|
Therapeutic continuity in Alzheimer's disease: switching patients to galantamine. Panel discussion: recommendations for prescribers. | 2001 |
|
Switching previous therapies for Alzheimer's disease to galantamine. | 2001 |
|
Effects of washout and dose-escalation periods on the efficacy, safety, and tolerability of galantamine in patients previously treated with donepezil: ongoing clinical trials. | 2001 |
|
Pharmacokinetic profiles of current therapies for Alzheimer's disease: implications for switching to galantamine. | 2001 |
|
Therapeutic continuity in Alzheimer's disease: switching patients to galantamine. Introduction. | 2001 |
|
Galantamine for Alzheimer's disease. | 2001 |
|
Clinical and cost-effectiveness of donepezil, rivastigmine and galantamine for Alzheimer's disease: a rapid and systematic review. | 2001 |
|
Cholinesterase inhibitors for Alzheimer's disease. | 2001 |
|
Muscarinic agonists and antagonists in the treatment of Alzheimer's disease. | 2001 Apr |
|
FDA approves galantamine for Alzheimer's disease. | 2001 Apr 15 |
|
Screening for acetylcholinesterase inhibitors from Amaryllidaceae using silica gel thin-layer chromatography in combination with bioactivity staining. | 2001 Apr 27 |
|
Current status and new developments with galantamine in the treatment of Alzheimer's disease. | 2001 Dec |
|
Galantamine: new preparation. The fourth cholinesterase inhibitor for Alzheimer's disease. | 2001 Dec |
|
[Alzheimer dementia. Comparison of the effectiveness of cholinesterase inhibitors and gingko]. | 2001 Dec 13 |
|
Galantamine, a cholinesterase inhibitor that allosterically modulates nicotinic receptors: effects on the course of Alzheimer's disease. | 2001 Feb 1 |
|
Allosteric sensitization of nicotinic receptors by galantamine, a new treatment strategy for Alzheimer's disease. | 2001 Feb 1 |
|
Galantamine introduced in Europe. | 2001 Jan-Feb |
|
Use of biomimetic diversity-oriented synthesis to discover galanthamine-like molecules with biological properties beyond those of the natural product. | 2001 Jul 11 |
|
Galantamine (reminyl) for Alzheimer's disease. | 2001 Jun 25 |
|
Differential increase in cerebrospinal fluid-acetylcholinesterase after treatment with acetylcholinesterase inhibitors in patients with Alzheimer's disease. | 2001 Mar 16 |
|
The pharmacological rationale for treating vascular dementia with galantamine (Reminyl). | 2001 May |
|
Meeting the challenges of vascular dementia. Introduction. | 2001 May |
|
Alzheimer's disease and related disorders. | 2001 May |
|
Galantamine hydrobromide. | 2001 Nov 15 |
|
Nicotinic receptor modulation: advantages for successful Alzheimer's disease therapy. | 2002 |
|
Galantamine: a pharmacoeconomic review of its use in Alzheimer's disease. | 2002 |
|
Clinical pharmacokinetics and pharmacodynamics of cholinesterase inhibitors. | 2002 |
|
[New theory! Galantamine and nicotinic-cholinergic transmission]. | 2002 |
|
Cholinergic medication for neuroleptic-induced tardive dyskinesia. | 2002 |
|
Understanding and managing behavioural symptoms in Alzheimer's disease and related dementias: focus on rivastigmine. | 2002 |
|
A non-cholinergic, trophic action of acetylcholinesterase on hippocampal neurones in vitro: molecular mechanisms. | 2002 |
|
Efficacy of galantamine in probable vascular dementia and Alzheimer's disease combined with cerebrovascular disease: a randomised trial. | 2002 Apr 13 |
|
Unconventional ligands and modulators of nicotinic receptors. | 2002 Dec |
|
Pd asymmetric allylic alkylation (AAA). A powerful synthetic tool. | 2002 Jan |
|
A rapid TLC bioautographic method for the detection of acetylcholinesterase and butyrylcholinesterase inhibitors in plants. | 2002 Jan-Feb |
|
Medical treatment of Alzheimer's disease: past, present, and future. | 2002 Jul |
|
Galantamine for treatment-resistant schizophrenia. | 2002 Jul |
|
[Nicotinic Receptor, galantamine and Alzheimer disease]. | 2002 Jun 1-15 |
|
[Latest therapies for treating dementia]. | 2002 May 15 |
|
[Dementing disorders. What benefits do the new anti-dementia drugs have?]. | 2002 May 6 |
|
[Rivastigmine: a review of its clinical effectiveness]. | 2002 Nov 1-15 |
|
[Treatment of Alzheimer's disease]. | 2002 Nov 1-15 |
|
Treatment options: the latest evidence with galantamine (Reminyl). | 2002 Nov 15 |
|
Galantamine improved cognition and global functioning in vascular dementia or Alzheimer disease with cerebrovascular disease. | 2002 Nov-Dec |
|
The impact of journal advertisements on prescribers of cholinesterase inhibitors. | 2002 Oct |
|
The cholinergic approach for the treatment of vascular dementia: evidence from pre-clinical and clinical studies. | 2002 Oct-Nov |
|
Galantamine provides broad benefits in patients with 'advanced moderate' Alzheimer's disease (MMSE < or = 12) for up to six months. | 2002 Sep |
|
Galantamine--a novel cholinergic drug with a unique dual mode of action for the treatment of patients with Alzheimer's disease. | 2002 Summer |
Sample Use Guides
The recommended starting dosage of RAZADYNE® tablets is 4 mg twice a day (8 mg/day). The dosage should be increased to the initial maintenance dosage of 8 mg twice a day (16 mg/day) after a minimum of 4 weeks. A further increase to 12 mg twice a day (24 mg/day) should be attempted after a minimum of 4 weeks at 8 mg twice a day (16 mg/day). Dosage increases should be based upon assessment of clinical benefit and tolerability of the previous dose.
Route of Administration:
Oral
In Vitro Use Guide
Sources: https://www.ncbi.nlm.nih.gov/pubmed/1954303
Galanthamine was evaluated as inhibitor of human acetylcholinesterase activity from samples of postmortem human brain, fresh brain cortex biopsies and human erythrocytes. The respective galanthamine concentration exerting a half maximal effect (IC50) on acetylcholinesterase in postmortem human brain frontal cortex was 3.2 uM versus 2.8 uM in the hippocampus region. In addition, galanthamine was 10-fold less potent in inhibiting the enzyme activity from human brain that from human erythrocytes.
Substance Class |
Chemical
Created
by
admin
on
Edited
Tue Apr 01 18:12:54 GMT 2025
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Record UNII |
HV8VV786RM
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Record Status |
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Record Version |
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