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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
Structure of GALANTAMINE HYDROBROMIDE, (±)-

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

HIDE SMILES / InChI

Description
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.

Originator

Curator's Comment: # Janssen Pharmaceuticals, a division of Ortho-McNeil-Jannsen Pharmaceuticals

Approval Year

Targets

Targets

Primary TargetPharmacologyConditionPotency
0.35 µM [IC50]
Conditions

Conditions

ConditionModalityTargetsHighest PhaseProduct
Palliative
RAZADYNE

Approved Use

Galantamine hydrobromide is a cholinesterase inhibitor indicated for the treatment of mild to moderate dementia of the Alzheimer’s type.

Launch Date

2001
Cmax

Cmax

ValueDoseCo-administeredAnalytePopulation
84.3 ng/mL
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

AUC

ValueDoseCo-administeredAnalytePopulation
1050 ng × h/mL
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

T1/2

ValueDoseCo-administeredAnalytePopulation
8.53 h
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

Funbound

ValueDoseCo-administeredAnalytePopulation
82%
GALANTAMINE plasma
Homo sapiens
population: UNKNOWN
age: UNKNOWN
sex: UNKNOWN
food status: UNKNOWN
Doses

Doses

DosePopulationAdverse 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%)
Vomiting (21%)
Diarrhea (16%)
Anorexia (15%)
Weight loss (8%)
Dizziness (15%)
Sources:
AEs

AEs

AESignificanceDosePopulation
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:
OverviewDrug as perpetrator​

Drug as perpetrator​

TargetModalityActivityMetaboliteClinical 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
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

Drug as victim

TargetModalityActivityMetaboliteClinical evidence
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
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
Sourcing

Sourcing

Vendor/AggregatorIDURL
PubMed

PubMed

TitleDatePubMed
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
Patents

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
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.
Name Type Language
GALANTAMINE HYDROBROMIDE, (±)-
Common Name English
(±)-GALANTHAMINE HYDROBROMIDE
Common Name English
6H-BENZOFURO(3A,3,2-EF)(2)BENZAZEPIN-6-OL, 4A,5,9,10,11,12-HEXAHYDRO-3-METHOXY-11-METHYL-, HYDROBROMIDE (1:1), (4AR,6S,8AR)-REL-
Systematic Name English
GALANTAMINE HYDROBROMIDE (RACEMIC)
Common Name English
(±)-GALANTAMINE HYDROBROMIDE
Common Name English
6H-BENZOFURO(3A,3,2-EF)(2)BENZAZEPIN-6-OL, 4A,5,9,10,11,12-HEXAHYDRO-3-METHOXY-11-METHYL-, HYDROBROMIDE, (4A.ALPHA.,6.BETA.,8AR*)-
Systematic Name English
GALANTAMINE HYDROBROMIDE RACEMIC [USP-RS]
Common Name English
Code System Code Type Description
CAS
193146-85-9
Created by admin on Sat Dec 16 08:23:01 GMT 2023 , Edited by admin on Sat Dec 16 08:23:01 GMT 2023
PRIMARY
FDA UNII
5N4SA4KQX9
Created by admin on Sat Dec 16 08:23:01 GMT 2023 , Edited by admin on Sat Dec 16 08:23:01 GMT 2023
PRIMARY
PUBCHEM
121587
Created by admin on Sat Dec 16 08:23:01 GMT 2023 , Edited by admin on Sat Dec 16 08:23:01 GMT 2023
PRIMARY
RS_ITEM_NUM
1287766
Created by admin on Sat Dec 16 08:23:01 GMT 2023 , Edited by admin on Sat Dec 16 08:23:01 GMT 2023
PRIMARY