Details
Stereochemistry | RACEMIC |
Molecular Formula | C17H21NO3.BrH |
Molecular Weight | 368.265 |
Optical Activity | ( + / - ) |
Defined Stereocenters | 3 / 3 |
E/Z Centers | 0 |
Charge | 0 |
SHOW SMILES / InChI
SMILES
Br.[H][C@]12C[C@@H](O)C=C[C@]13CCN(C)CC4=CC=C(OC)C(O2)=C34
InChI
InChIKey=QORVDGQLPPAFRS-XPSHAMGMSA-N
InChI=1S/C17H21NO3.BrH/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
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 n = 1 Health Status: unhealthy Condition: Alzheimer's disease Age Group: 90 years Sex: M Population Size: 1 Sources: |
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 n = 429 Health Status: unhealthy Condition: Alzheimer's disease Age Group: adult Sex: unknown Population Size: 429 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 n = 1 Health Status: unhealthy Condition: Alzheimer's disease Age Group: 90 years Sex: M Population Size: 1 Sources: |
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 n = 429 Health Status: unhealthy Condition: Alzheimer's disease Age Group: adult Sex: unknown Population Size: 429 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 n = 429 Health Status: unhealthy Condition: Alzheimer's disease Age Group: adult Sex: unknown Population Size: 429 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 n = 429 Health Status: unhealthy Condition: Alzheimer's disease Age Group: adult Sex: unknown Population Size: 429 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 n = 429 Health Status: unhealthy Condition: Alzheimer's disease Age Group: adult Sex: unknown Population Size: 429 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 n = 429 Health Status: unhealthy Condition: Alzheimer's disease Age Group: adult Sex: unknown Population Size: 429 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 n = 429 Health Status: unhealthy Condition: Alzheimer's disease Age Group: adult Sex: unknown Population Size: 429 Sources: |
Overview
CYP3A4 | CYP2C9 | CYP2D6 | hERG |
---|---|---|---|
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 |
|
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 |
|
Clinical and cost-effectiveness of donepezil, rivastigmine and galantamine for Alzheimer's disease: a rapid and systematic review. | 2001 |
|
Screening for acetylcholinesterase inhibitors from Amaryllidaceae using silica gel thin-layer chromatography in combination with bioactivity staining. | 2001 Apr 27 |
|
Maintaining functional and behavioral abilities in Alzheimer disease. | 2001 Aug |
|
Maintaining cognitive function in Alzheimer disease: how effective are current treatments? | 2001 Aug |
|
Unsafe prescription medication switching recommendations. | 2001 Dec |
|
Galantamine, a cholinesterase inhibitor that allosterically modulates nicotinic receptors: effects on the course of Alzheimer's disease. | 2001 Feb 1 |
|
Three-dimensional structure of a complex of galanthamine (Nivalin) with acetylcholinesterase from Torpedo californica: implications for the design of new anti-Alzheimer drugs. | 2001 Feb 1 |
|
Featured CME topic: dementia. Medication update. | 2001 Jul |
|
Use of cholinesterase inhibitors for treatment of Alzheimer disease. | 2001 Jul |
|
Use of biomimetic diversity-oriented synthesis to discover galanthamine-like molecules with biological properties beyond those of the natural product. | 2001 Jul 11 |
|
Meeting the challenges of vascular dementia. Introduction. | 2001 May |
|
Alzheimer's disease and related disorders. | 2001 May |
|
Effects of a flexible galantamine dose in Alzheimer's disease: a randomised, controlled trial. | 2001 Nov |
|
Galantamine: a randomized, double-blind, dose comparison in patients with Alzheimer's disease. | 2001 Sep |
|
Clinical pharmacokinetics and pharmacodynamics of cholinesterase inhibitors. | 2002 |
|
[New theory! Galantamine and nicotinic-cholinergic transmission]. | 2002 |
|
Assessment of Health Economics in Alzheimer's Disease (AHEAD): treatment with galantamine in Sweden. | 2002 |
|
Galantamine for Alzheimer's disease. | 2002 |
|
Cholinergic medication for neuroleptic-induced tardive dyskinesia. | 2002 |
|
Pharmacokinetics and safety of galantamine in subjects with hepatic impairment and healthy volunteers. | 2002 Apr |
|
Unconventional ligands and modulators of nicotinic receptors. | 2002 Dec |
|
Galantamine for treatment-resistant schizophrenia. | 2002 Jul |
|
[Latest therapies for treating dementia]. | 2002 May 15 |
|
[Galantamine: a novel cholinergic agent for Alzheimer's disease]. | 2002 Oct |
|
The impact of journal advertisements on prescribers of cholinesterase inhibitors. | 2002 Oct |
|
Acetylcholinesterase inhibitory activity of some Amaryllidaceae alkaloids and Narcissus extracts. | 2002 Oct 11 |
|
Broad therapeutic benefits in patients with probable vascular dementia or Alzheimer's disease with cerebrovascular disease after treatment with galantamine. | 2002 Sep |
|
Adjuvant galantamine administration improves negative symptoms in a patient with treatment-refractory schizophrenia. | 2002 Sep-Oct |
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.
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PARENT (SALT/SOLVATE)
SUBSTANCE RECORD