AZELASTINE HYDROCHLORIDE

First approved in 1996

Details

Stereochemistry	RACEMIC
Molecular Formula	C22H24ClN3O.ClH
Molecular Weight	418.359
Optical Activity	( + / - )
Defined Stereocenters	0 / 1
E/Z Centers	0
Charge	0

SHOW SMILES / InChI

Structure Search

SMILES

Cl.CN1CCCC(CC1)N2N=C(CC3=CC=C(Cl)C=C3)C4=CC=CC=C4C2=O

InChI

InChIKey=YEJAJYAHJQIWNU-UHFFFAOYSA-N

InChI=1S/C22H24ClN3O.ClH/c1-25-13-4-5-18(12-14-25)26-22(27)20-7-3-2-6-19(20)21(24-26)15-16-8-10-17(23)11-9-16;/h2-3,6-11,18H,4-5,12-15H2,1H3;1H

HIDE SMILES / InChI

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	C22H24ClN3O
Molecular Weight	381.898
Charge	0
Count

Stereochemistry	RACEMIC
Additional Stereochemistry	No
Defined Stereocenters	0 / 1
E/Z Centers	0
Optical Activity	( + / - )

Description
Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2015/022203s010s011lbl.pdf
Curator's Comment: description was created based on several sources, including: http://www.rxlist.com/astelin-drug.htm | https://www.drugs.com/pro/azelastine.html

Azelastine, a phthalazine derivative, is an antihistamine and mast cell stabilizer. Azelastine is oxidatively metabolized to the principal active metabolite, desmethylazelastine, by the cytochrome P450 enzyme system. It is indicated for the relief of the symptoms of seasonal allergic rhinitis and perennial allergic rhinitis. The most common adverse reactions are: pyrexia, dysgeusia, nasal discomfort, epistaxis, headache, sneezing, fatigue, somnolence, upper respiratory infection, cough, rhinalgia, vomiting, otitis media, contact dermatitis, and oropharyngeal pain. Concurrent use of Azelastine with alcohol or other central nervous system depressants should be avoided because reductions in alertness and impairment of central nervous system performance may occur.

CNS Activity

Originator

Approval Year

Targets

Primary Target	Pharmacology	Potency
Histamine H1 receptor 315 Target ID: CHEMBL231 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2015/022203s010s011lbl.pdf	Antagonist 2778	872.0 nM [Kd]
Cytochrome P450 2D6 61 Target ID: CHEMBL289 Sources: https://www.ncbi.nlm.nih.gov/pubmed/10421623	Substrate 661
Cytochrome P450 3A4 127 Target ID: CHEMBL340 Sources: https://www.ncbi.nlm.nih.gov/pubmed/10421623	Substrate 661

Conditions

Condition	Modality	Targets	Highest Phase	Product
Seasonal allergic rhinitis 64 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2015/022203s010s011lbl.pdf	Palliative		Approved 8429	ASTELIN Approved Use Azelastine hydrochloride ophthalmic solution is indicated for the treatment of itching of the eye associated with allergic conjunctivitis. Launch Date 8.4680638E11
Perennial allergic rhinitis 47 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2015/022203s010s011lbl.pdf	Palliative		Approved 8429	ASTELIN Approved Use Azelastine hydrochloride ophthalmic solution is indicated for the treatment of itching of the eye associated with allergic conjunctivitis. Launch Date 8.4680638E11

C_max

Value	Dose	Co-administered	Analyte	Population
61.59 pg/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/23681835	0.28 mg single, nasal dose: 0.28 mg route of administration: Nasal experiment type: SINGLE co-administered:		AZELASTINE HYDROCHLORIDE plasma	Homo sapiens population: HEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN

AUC

Value	Dose	Co-administered	Analyte	Population
1526.8 pg × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/23681835	0.28 mg single, nasal dose: 0.28 mg route of administration: Nasal experiment type: SINGLE co-administered:		AZELASTINE HYDROCHLORIDE plasma	Homo sapiens population: HEALTHY age: ADULT sex: FEMALE / MALE food status: UNKNOWN

T_1/2

Value	Dose	Co-administered	Analyte	Population
22 h DRUG LABEL https://www.accessdata.fda.gov/drugsatfda_docs/label/2018/020114s028lbl.pdf	unknown, unknown		AZELASTINE HYDROCHLORIDE plasma	Homo sapiens population: UNKNOWN age: UNKNOWN sex: UNKNOWN food status: UNKNOWN

F_unbound

Value	Dose	Co-administered	Analyte	Population
12% DRUG LABEL https://www.accessdata.fda.gov/drugsatfda_docs/label/2018/020114s028lbl.pdf	unknown, unknown		AZELASTINE HYDROCHLORIDE plasma	Homo sapiens population: UNKNOWN age: UNKNOWN sex: UNKNOWN food status: UNKNOWN

Doses

Dose	Population	Adverse events
4 mg 1 times / day multiple, oral Dose: 4 mg, 1 times / day Route: oral Route: multiple Dose: 4 mg, 1 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/	unhealthy, 38.5 years (range: 18-64 years) n = 16 Health Status: unhealthy Condition: Chronic Idiopathic Urticaria Age Group: 38.5 years (range: 18-64 years) Sex: M+F Population Size: 16 Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/	Disc. AE: Taste perversion, Gastritis... AEs leading to discontinuation/dose reduction: Taste perversion (2 patients) Gastritis (1 patient) Somnolence (1 patient) Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/
0.015 mg 2 times / day multiple, ophthalmic Dose: 0.015 mg, 2 times / day Route: ophthalmic Route: multiple Dose: 0.015 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/9787982/	unhealthy, 4-12 years n = 51 Health Status: unhealthy Condition: seasonal allergic conjunctiviti Age Group: 4-12 years Sex: M+F Population Size: 51 Sources: https://pubmed.ncbi.nlm.nih.gov/9787982/	Disc. AE: Burning sensation, Taste bitter... AEs leading to discontinuation/dose reduction: Burning sensation (1 patient) Taste bitter (1 patient) Sources: https://pubmed.ncbi.nlm.nih.gov/9787982/
274 ug 2 times / day multiple, intranasal Recommended Dose: 274 ug, 2 times / day Route: intranasal Route: multiple Dose: 274 ug, 2 times / day Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44	unhealthy, > 12 years n = 216 Health Status: unhealthy Condition: seasonal allergic rhinitis. Age Group: > 12 years Population Size: 216 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44	Disc. AE: Somnolence, Back pain... AEs leading to discontinuation/dose reduction: Somnolence (2 patients) Back pain (1 patient) Taste perversion (1 patient) Sinusitis (1 patient) Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44

AEs

AE	Significance	Dose	Population
Gastritis	1 patient Disc. AE	4 mg 1 times / day multiple, oral Dose: 4 mg, 1 times / day Route: oral Route: multiple Dose: 4 mg, 1 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/	unhealthy, 38.5 years (range: 18-64 years) n = 16 Health Status: unhealthy Condition: Chronic Idiopathic Urticaria Age Group: 38.5 years (range: 18-64 years) Sex: M+F Population Size: 16 Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/
Somnolence	1 patient Disc. AE	4 mg 1 times / day multiple, oral Dose: 4 mg, 1 times / day Route: oral Route: multiple Dose: 4 mg, 1 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/	unhealthy, 38.5 years (range: 18-64 years) n = 16 Health Status: unhealthy Condition: Chronic Idiopathic Urticaria Age Group: 38.5 years (range: 18-64 years) Sex: M+F Population Size: 16 Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/
Taste perversion	2 patients Disc. AE	4 mg 1 times / day multiple, oral Dose: 4 mg, 1 times / day Route: oral Route: multiple Dose: 4 mg, 1 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/	unhealthy, 38.5 years (range: 18-64 years) n = 16 Health Status: unhealthy Condition: Chronic Idiopathic Urticaria Age Group: 38.5 years (range: 18-64 years) Sex: M+F Population Size: 16 Sources: https://pubmed.ncbi.nlm.nih.gov/11316966/
Burning sensation	1 patient Disc. AE	0.015 mg 2 times / day multiple, ophthalmic Dose: 0.015 mg, 2 times / day Route: ophthalmic Route: multiple Dose: 0.015 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/9787982/	unhealthy, 4-12 years n = 51 Health Status: unhealthy Condition: seasonal allergic conjunctiviti Age Group: 4-12 years Sex: M+F Population Size: 51 Sources: https://pubmed.ncbi.nlm.nih.gov/9787982/
Taste bitter	1 patient Disc. AE	0.015 mg 2 times / day multiple, ophthalmic Dose: 0.015 mg, 2 times / day Route: ophthalmic Route: multiple Dose: 0.015 mg, 2 times / day Sources: https://pubmed.ncbi.nlm.nih.gov/9787982/	unhealthy, 4-12 years n = 51 Health Status: unhealthy Condition: seasonal allergic conjunctiviti Age Group: 4-12 years Sex: M+F Population Size: 51 Sources: https://pubmed.ncbi.nlm.nih.gov/9787982/
Back pain	1 patient Disc. AE	274 ug 2 times / day multiple, intranasal Recommended Dose: 274 ug, 2 times / day Route: intranasal Route: multiple Dose: 274 ug, 2 times / day Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44	unhealthy, > 12 years n = 216 Health Status: unhealthy Condition: seasonal allergic rhinitis. Age Group: > 12 years Population Size: 216 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44
Sinusitis	1 patient Disc. AE	274 ug 2 times / day multiple, intranasal Recommended Dose: 274 ug, 2 times / day Route: intranasal Route: multiple Dose: 274 ug, 2 times / day Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44	unhealthy, > 12 years n = 216 Health Status: unhealthy Condition: seasonal allergic rhinitis. Age Group: > 12 years Population Size: 216 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44
Taste perversion	1 patient Disc. AE	274 ug 2 times / day multiple, intranasal Recommended Dose: 274 ug, 2 times / day Route: intranasal Route: multiple Dose: 274 ug, 2 times / day Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44	unhealthy, > 12 years n = 216 Health Status: unhealthy Condition: seasonal allergic rhinitis. Age Group: > 12 years Population Size: 216 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44
Somnolence	2 patients Disc. AE	274 ug 2 times / day multiple, intranasal Recommended Dose: 274 ug, 2 times / day Route: intranasal Route: multiple Dose: 274 ug, 2 times / day Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44	unhealthy, > 12 years n = 216 Health Status: unhealthy Condition: seasonal allergic rhinitis. Age Group: > 12 years Population Size: 216 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/nda/2000/20114S006_Astelin%20Nasal%20Spray_medr_P2.pdf Page: p. 44

Sourcing

Vendor/Aggregator	ID	URL
ChEBI	CHEBI:2950	https://www.ebi.ac.uk/chebi/searchId.do?chebiId=CHEBI:2950
ChemicalBook	CB6256007	https://www.chemicalbook.com/ChemicalProductProperty_EN_CB6256007
MolPort	MolPort-006-167-674	https://www.molport.com/shop/molecule-link/MolPort-006-167-674

PubMed

Title	Date	PubMed
Evaluation of the efficacy of olopatadine hydrochloride 0.1% ophthalmic solution and azelastine hydrochloride 0.05% ophthalmic solution in the conjunctival allergen challenge model.	2001 Aug	11558863
[Influence of peplomycin on pulmonary function (PaO2, %DLco) in patients with oral carcinoma].	2001 Sep	11579635
Mechanism of the antitussive effect of azelastine in guinea pigs.	2002	12109044
Azelastine is more potent than olopatadine n inhibiting interleukin-6 and tryptase release from human umbilical cord blood-derived cultured mast cells.	2002 May	12027072
A study of intranasal distribution of azelastine hydrochloride aqueous nasal spray with different spray techniques.	2002 Oct	12383290
Suplatast tosilate inhibits eosinophil production and recruitment into the skin in murine contact sensitivity.	2003 Sep	14499249
Pharmacokinetic interactions between Japanese traditional medicine (kampo) and modern medicine (III). Effect of Sho-seiryu-to on the pharmacokinetics of azelastine hydrochloride in rats.	2004 May	15133242
Review of the pharmacology, clinical efficacy, and safety of azelastine hydrochloride.	2005 Jul	20476933
[Azelastine hydrochloride in the treatment of allergic rhinitis].	2005 Sep	16335418
Antiallergic drugs, azelastine hydrochloride and epinastine hydrochloride, inhibit ongoing IgE secretion of rat IgE-producing hybridoma FE-3 cells.	2006 Oct 10	16925996
Onset of action of azelastine nasal spray compared with mometasone nasal spray and placebo in subjects with seasonal allergic rhinitis evaluated in an environmental exposure chamber.	2007 Jul-Aug	17882923
Azelastine hydrochloride: a review of pharmacology, pharmacokinetics, clinical efficacy and tolerability.	2007 Oct	17723160
Comparison of the conjunctival toxicity of topical ocular antiallergic agents.	2008 Dec	19049267
Combination therapy with azelastine hydrochloride nasal spray and fluticasone propionate nasal spray in the treatment of patients with seasonal allergic rhinitis.	2008 Jan	18254486
Azelastine hydrochloride on behavioral and psychological symptoms and activities of daily living in dementia patients.	2008 Mar	18713191
Effectiveness of twice daily azelastine nasal spray in patients with seasonal allergic rhinitis.	2008 Oct	19209282
Contact allergic dermatitis and periocular depigmentation after using olapatidine eye drops.	2008 Sep-Oct	18711283
Ebastine in the light of CONGA recommendations for the development of third-generation antihistamines.	2009 Aug 31	21437146
Effects of olopatadine hydrochloride nasal spray 0.6% in the treatment of seasonal allergic rhinitis: a phase III, multicenter, randomized, double-blind, active- and placebo-controlled study in adolescents and adults.	2009 Jan	19243710
Pharmacokinetic characteristics and safety and tolerability of a reformulated azelastine hydrochloride nasal spray in patients with chronic rhinitis.	2009 Jan	19220164
Allergen-induced airway inflammation and its therapeutic intervention.	2009 Oct	20224664
Advanced taste sensors based on artificial lipids with global selectivity to basic taste qualities and high correlation to sensory scores.	2010	22319306
Double-blind, placebo-controlled study of azelastine and fluticasone in a single nasal spray delivery device.	2010 Aug	20674829
Prevention and management of antineoplastic therapy induced oral mucositis.	2010 Jul	22442583
Rhinitis in the geriatric population.	2010 May 13	20465792
Azelastine hydrochloride, a dual-acting anti-inflammatory ophthalmic solution, for treatment of allergic conjunctivitis.	2010 Sep 7	20856595
The discovery of phthalazinone-based human H1 and H3 single-ligand antagonists suitable for intranasal administration for the treatment of allergic rhinitis.	2011 Apr 14	21381763

Patents

Sample Use Guides

In Vivo Use Guide

0.1% or 0.15% azelastine hydrochloride: 1 or 2 sprays per nostril once or twice daily.

Route of Administration: Nasal

In Vitro Use Guide

In a rat mast RBL-2H3 cell line, azelastine inhibited Ag- and ionomycin-induced TNF-alpha release with IC50 values of 25.7 +/- 3.4 uM and 1.66 +/- 0.45 uM, respectively.

Substance Class	Chemical Created by `admin` on `Fri Dec 15 16:11:21 UTC 2023` Edited by `admin` on `Fri Dec 15 16:11:21 UTC 2023`
Record UNII	0L591QR10I
Record Status	`Validated (UNII)`
Record Version

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Name

Type

Language

AZELASTINE HYDROCHLORIDE

Official Name

English

OPTIVAR

Brand Name

English

A-5610

Code

English

ASTEPRO

Brand Name

English

AZELASTINE HYDROCHLORIDE [VANDF]

Common Name

English

AZELASTINE HYDROCHLORIDE [MI]

Common Name

English

4-(P-CHLOROBENZYL)-2-(HEXAHYDRO-1-METHYL-1H-AZEPIN-4-YL)-1(2H)-PHTHALAZINONE MONOHYDROCHLORIDE

Common Name

English

AZELASTINE HYDROCHLORIDE [MART.]

Common Name

English

ASTELIN

Brand Name

English

AZELASTINE HYDROCHLORIDE [USP-RS]

Common Name

English

AZELASTINE HYDROCHLORIDE [USAN]

Common Name

English

AZELASTINE HYDROCHLORIDE COMPONENT OF DYMISTA

Common Name

English

DYMISTA COMPONENT AZELASTINE HYDROCHLORIDE

Common Name

English

AZELASTINE HYDROCHLORIDE [JAN]

Common Name

English

AZELASTINE HCL

Common Name

English

AZELASTINE HYDROCHLORIDE [ORANGE BOOK]

Common Name

English

Azelastine hydrochloride [WHO-DD]

Common Name

English

W-2979M

Code

English

AZELASTINE HYDROCHLORIDE [EP MONOGRAPH]

Common Name

English

AZELASTINE HYDROCHLORIDE [USP MONOGRAPH]

Common Name

English

1(2H)-PHTHALAZINONE, 4-((4-CHLOROPHENYL)METHYL)-2-(HEXAHYDRO-1-METHYL-1H-AZEPIN-4-YL)-, MONOHYDROCHLORIDE

Common Name

English

E-0659

Code

English

ASTEPRO ALLERGY

Brand Name

English

Classification Tree Code System Code

NCI_THESAURUS

C29578