エメダスチン
- 関
- emedastine difumarate
Wikipedia preview
出典(authority):フリー百科事典『ウィキペディア(Wikipedia)』「2017/03/13 16:17:49」(JST)
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Emedastine
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Clinical data |
Trade names |
Emadine |
AHFS/Drugs.com |
Monograph |
Routes of
administration |
Topical (ophthalmic solution) |
ATC code |
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Legal status |
Legal status |
- In general: ℞ (Prescription only)
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Pharmacokinetic data |
Bioavailability |
~50% (oral) (Tmax = 1–2 hours)[1] |
Metabolism |
Hepatic |
Biological half-life |
3–4 hours (oral), 10 hours (topical) |
Identifiers |
IUPAC name
- 1-(2-ethoxyethyl)-2-(4-methyl-1,4-diazepan-1-yl)-benzimidazole
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CAS Number |
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PubChem CID |
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IUPHAR/BPS |
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DrugBank |
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ChemSpider |
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UNII |
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KEGG |
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ChEBI |
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ChEMBL |
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Chemical and physical data |
Formula |
C17H26N4O |
Molar mass |
302.415 g/mol |
3D model (Jmol) |
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SMILES
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O(CC)CCn1c(nc2ccccc12)N3CCCN(C)CC3
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InChI
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InChI=1S/C17H26N4O/c1-3-22-14-13-21-16-8-5-4-7-15(16)18-17(21)20-10-6-9-19(2)11-12-20/h4-5,7-8H,3,6,9-14H2,1-2H3 Y
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Key:KBUZBQVCBVDWKX-UHFFFAOYSA-N Y
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(verify) |
Emedastine (trade name Emadine) is a second generation[citation needed] antihistamine used in eye drops to alleviate the symptoms of allergic conjunctivitis. It acts as a H1 receptor antagonist. It works by blocking the action of histamine that causes allergic symptoms. It is used in form of the difumarate.[2] The emedastine difumarate is a white, crystalline, water-soluble fine powder. Emedastine eye drops is usually applied twice a day to the affected eye. When the patients with allergic conjunctivitis were treated with 0.05% emedastine difumarate ophthalmic solution for six weeks, the signs and symptoms such as redness, itching and swelling of the eyes were relieved. Emedastine appears to be devoid of effects on adrenergic, dopaminergic and serotonin receptors. This drug was developed by Alcon, which is global medical company specializing in eye care products.
Contents
- 1 Pharmacodynamics
- 2 Pharmacokinetics
- 3 Contraindications
- 4 Adverse events
- 5 References
Pharmacodynamics
Emedastine is significantly selective to H1 histamine receptors (Ki = 1.3 nM), whereas its affinities for other histamine receptors were low (H2: Ki = 49067 nM and H3: Ki = 12430 nM) ub in vitro study. Topical ocular administration of emedastine inhibits histamine-stimulated vascular permeability in the conjunctiva as a concentration-dependent manner in in vitro study.
Pharmacokinetics
The human oral bioavailability is approximately 50% and maximum plasma concentration was achieved within 1–2 hours after dosing. Emedastine is mainly metabolized by the liver. There are two primary metabolites: 5-hydroxyemedastine and 6-hydroxyemedastine. They are excreted in the urine as both free and conjugated forms. The 5'-oxoanalogs of 5-hydroxyemedastine, 6-hydroxyemedastine and the N-oxide are also formed as minor metabolites. The elimination half-life of oral emedastine in plasma is 3–4 hours, whereas that of topical emedastine is 10 hours. Approximately 44% of the oral dose is recovered in the urine over 24 hours with only 3.6% of the dose excreted as parent drug.[1]
Contraindications
Emedastine should not be used in patients who are hypersensitive to emedastine or any other excipients of the preparation. Benzalkonium chloride contained in the bottle of emedastine solution can discolor soft contact lenses, so people who wear contact lenses should be careful using it.
Adverse events
The most common adverse effect was headache (11%). The other minor adverse effects encountered in less than 5% of patients were asthenia, burning or stinging sensation, unpleasant taste, blurred vision, eye dryness and tearing.
References
- ^ a b "Emadine (emedastine difumarate ophthalmic solution) 0.05%. Full Prescribing Information" (PDF). Alcon Laboratories, Inc. 6201 South Freeway Fort Worth, Texas 76134, USA. Retrieved 5 January 2016.
- ^ Bielory, L.; Lien, K. W.; Bigelsen, S. (2005). "Efficacy and tolerability of newer antihistamines in the treatment of allergic conjunctivitis". Drugs. 65 (2): 215–228. doi:10.2165/00003495-200565020-00004. PMID 15631542.
Antihistamines (R06)
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|
Aminoalkyl ethers |
- Bromazine (bromodiphenhydramine)
- Carbinoxamine
- Clemastine
- Chlorphenoxamine
- Diphenylpyraline
- Diphenhydramine
- Doxylamine
- Orphenadrine
- Phenyltoloxamine
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Substituted alkylamines |
- Brompheniramine
- Chlorphenamine
- Dexbrompheniramine (+pseudoephedrine)
- Dexchlorpheniramine (+betamethasone)
- Dimetindene
- Pheniramine
- Talastine
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Substituted ethylenediamines |
- Chloropyramine
- Histapyrrodine
- Mepyramine
- Methapyrilene
- Tripelennamine (pyribenzamine)
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Phenothiazine derivatives |
- Alimemazine
- Fenethazine
- Hydroxyethylpromethazine
- Isothipendyl
- Mequitazine
- Methdilazine
- Oxomemazine
- Promethazine
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Piperazine derivatives |
- Buclizine
- Cetirizine
- Chlorcyclizine
- Cinnarizine
- Cyclizine
- Hydroxyzine
- Meclizine
- Oxatomide
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Others for systemic use |
- Antazoline
- Azanator
- Azatadine
- Bamipine
- Cyproheptadine
- Deptropine
- Ebastine
- Emedastine
- Epinastine
- Ketotifen
- Latrepirdine
- Mebhydrolin
- Mizolastine
- Olopatadine
- Phenindamine
- Pimethixene
- Pyrrobutamine
- Quifenadine
- Rupatadine
- Triprolidine
- selective (Acrivastine
- Astemizole
- Azelastine
- Bilastine
- Desloratadine
- Fexofenadine
- Loratadine
- Terfenadine)
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For topical use |
- Bamipine
- Chloropyramine
- Chlorphenoxamine
- Clemastine
- Dimetindene
- Diphenhydramine
- Isothipendyl
- Mepyramine
- Promethazine
- Thenalidine
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Histaminergics
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Receptor
(ligands) |
H1 |
- Agonists: 2-Pyridylethylamine
- Betahistine
- Histamine
- HTMT
- UR-AK49
- Antagonists: First-generation: 4-Methyldiphenhydramine
- Alimemazine
- Antazoline
- Azatadine
- Bamipine
- Benzatropine (benztropine)
- Bepotastine
- Bromazine
- Brompheniramine
- Buclizine
- Captodiame
- Carbinoxamine
- Chlorcyclizine
- Chloropyramine
- Chlorothen
- Chlorphenamine
- Chlorphenoxamine
- Cinnarizine
- Clemastine
- Clobenzepam
- Clocinizine
- Cloperastine
- Cyclizine
- Cyproheptadine
- Dacemazine
- Decloxizine
- Deptropine
- Dexbrompheniramine
- Dexchlorpheniramine
- Dimenhydrinate
- Dimetindene
- Diphenhydramine
- Diphenylpyraline
- Doxylamine
- Embramine
- Etodroxizine
- Etybenzatropine (ethylbenztropine)
- Etymemazine
- Fenethazine
- Flunarizine
- Histapyrrodine
- Homochlorcyclizine
- Hydroxyethylpromethazine
- Hydroxyzine
- Isopromethazine
- Isothipendyl
- Meclozine
- Medrylamine
- Mepyramine (pyrilamine)
- Mequitazine
- Methafurylene
- Methapyrilene
- Methdilazine
- Moxastine
- Orphenadrine
- Oxatomide
- Oxomemazine
- Phenindamine
- Pheniramine
- Phenyltoloxamine
- Pimethixene
- Piperoxan
- Pipoxizine
- Promethazine
- Propiomazine
- Pyrrobutamine
- Talastine
- Thenalidine
- Thenyldiamine
- Thiazinamium
- Thonzylamine
- Tolpropamine
- Tripelennamine
- Triprolidine
- Second/third-generation: Acrivastine
- Alinastine
- Astemizole
- Azelastine
- Bamirastine
- Barmastine
- Bepiastine
- Bepotastine
- Bilastine
- Cabastinen
- Carebastine
- Cetirizine
- Clemastine
- Clemizole
- Clobenztropine
- Desloratadine
- Dorastine
- Ebastine
- Efletirizine
- Emedastine
- Epinastine
- Fexofenadine
- Flezelastine
- Ketotifen
- Latrepirdine
- Levocabastine
- Levocetirizine
- Linetastine
- Loratadine
- Mapinastine
- Mebhydrolin
- Mizolastine
- Moxastine
- Noberastine
- Octastine
- Olopatadine
- Perastine
- Pibaxizine
- Piclopastine
- Quifenadine (phencarol)
- Rocastine
- Rupatadine
- Setastine
- Sequifenadine (bicarphen)
- Talastine
- Temelastine
- Terfenadine
- Vapitadine
- Zepastine
- Non-generational: Atypical antipsychotics (e.g., aripiprazole, asenapine, clozapine, iloperidone, olanzapine, paliperidone, quetiapine, risperidone, ziprasidone, zotepine)
- Tetracyclic antidepressants (e.g., amoxapine, loxapine, maprotiline, mianserin, mirtazapine, oxaprotiline)
- Tricyclic antidepressants (e.g., amitriptyline, butriptyline, clomipramine, desipramine, dosulepin (dothiepin), doxepin, imipramine, iprindole, lofepramine, nortriptyline, protriptyline, trimipramine)
- Typical antipsychotics (e.g., chlorpromazine, flupenthixol, fluphenazine, loxapine, perphenazine, prochlorperazine, thioridazine, thiothixene)
- Unknown/unsorted: Belarizine
- Elbanizine
- Flotrenizine
- Napactadine
- Tagorizine
- Trelnarizine
- Trenizine
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H2 |
- Agonists: Amthamine
- Betazole
- Dimaprit
- Histamine
- HTMT
- Impromidine
- UR-AK49
- Antagonists: Bisfentidine
- Burimamide
- Cimetidine
- Dalcotidine
- Donetidine
- Ebrotidine
- Etintidine
- Famotidine
- Isolamtidine
- Lafutidine
- Lamtidine
- Lavoltidine (loxtidine)
- Lupitidine
- Metiamide
- Mifentidine
- Niperotidine
- Nizatidine
- Osutidine
- Oxmetidine
- Pibutidine
- Quisultazine (quisultidine)
- Ramixotidine
- Ranitidine
- Roxatidine
- Sufotidine
- Tiotidine
- Tuvatidine
- Venritidine
- Xaltidine
- Zolantidine
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H3 |
- Agonists: α-Methylhistamine
- Cipralisant
- Histamine
- Imetit
- Immepip
- Immethridine
- Methimepip
- Proxyfan
- Antagonists: A-349,821
- A-423,579
- ABT-239
- ABT-652
- AZD5213
- Betahistine
- Burimamide
- Ciproxifan
- Clobenpropit
- Conessine
- Enerisant
- GSK-189,254
- Impentamine
- Iodophenpropit
- Irdabisant
- JNJ-5207852
- MK-0249
- NNC 38-1049
- PF-03654746
- Pitolisant
- SCH-79687
- Thioperamide
- VUF-5681
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H4 |
- Agonists: 4-Methylhistamine
- α-Methylhistamine
- Histamine
- OUP-16
- VUF-8430
- Antagonists: JNJ-7777120
- Mianserin
- Thioperamide
- Toreforant
- VUF-6002
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Transporter
(inhibitors) |
VMATs |
TAAR1 inactive |
- Amiodarone
- APP
- AZIK
- Bietaserpine
- Deserpidine
- Dihydrotetrabenazine
- Efavirenz
- GBR-12935
- GZ-793A
- Ibogaine
- Ketanserin
- Lobeline
- Methoxytetrabenazine
- Reserpine
- Rose bengal
- SD-809
- Tetrabenazine
- Valbenazine
- Vanoxerine (GBR-12909)
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TAAR1 active |
- Amphetamine
- Methamphetamine
- MDMA
- Phenethylamine
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Enzyme
(inhibitors) |
HDC |
- Catechin
- Meciadanol
- Naringenin
- Tritoqualine
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HNMT |
- Amodiaquine
- Diphenhydramine
- Harmaline
- Metoprine
- Quinacrine
- SKF-91,488
- Tacrine
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DAO |
- Pimagedine (aminoguanidine)
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Others |
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UpToDate Contents
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English Journal
- Contribution of mast cells to cerebral aneurysm formation.
- Ishibashi R, Aoki T, Nishimura M, Hashimoto N, Miyamoto S.SourceDepartment of Neurosurgery, Kyoto University, Graduate School of Medicine, Kyoto, Japan.
- Current neurovascular research.Curr Neurovasc Res.2010 May;7(2):113-24.
- Cerebral aneurysm (CA) has a high prevalence and causes a fatal subarachnoid hemorrhage. Although CA is a socially important disease, there are currently no medical treatments for CA, except for surgical procedures, because the detailed mechanisms of CA formation remain unclear. From recent studies,
- PMID 20334612
- [Antihistamines in the treatment of allergic rhinitis--update 2008/2009].
- Kruszewski J.SourceKlinika Chorob Infekcyjnych i Alergologii, Wojskowy Instytut Medyczny w Warszawie.
- Otolaryngologia polska. The Polish otolaryngology.Otolaryngol Pol.2009 Sep;63(7):5-10.
- The following paper reviews the latest news on antihistamines used in the treatment of allergic rhinitis. It describes the new results of investigations on clinical application of H3 and H4 receptors in therapy of allergic diseases as well as the effect of emedastine on histamine-induced tissue remo
- PMID 20564892
Japanese Journal
- アトピー性皮膚炎モデルマウス(NC/Ngaマウス)に経口投与した抗アレルギー薬(フマル酸エメダスチン)の発症予防ならびに治療効果の検討
- 西村 久美子,江 挙,中尾 裕史,坪井 良治,小川 秀興
- 日本皮膚科学会雑誌 = THE JAPANESE JOURNAL OF DERMATOLOGY 114(9), 1507-1516, 2004-08-20
- NAID 10013672235
- フマル酸エメダスチンおよび種々選択的H1受容体拮抗・アレルギー性疾患治療薬のモルモットにおけるヒスタミン誘発および受身皮膚アナフィラキシー反応に及ぼす影響
Related Links
- InChI. InChI=1S/C17H26N4O/c1-3-22-14-13-21-16-8-5-4-7-15(16)18-17(21)20- 10-6-9-19(2)11-12-20/h4-5,7-8H,3,6,9-14H2,1-2H3 Yes Y Key: KBUZBQVCBVDWKX-UHFFFAOYSA-N Yes Y. Yes Y(what is this?) (verify). Emedastine difumarate ...
Related Pictures
![Emadine 0.05 % Eye Drops](https://1mg.info/0/8/3/0266.jpg)
![Emedastine.png](https://1mg.info/0/8/3/0267.jpg)
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![emadine Emedastine Ophth Emadine](https://1mg.info/0/8/3/0269.jpg)
![39E023 Emedastine oph. 5ml/BT](https://1mg.info/0/8/3/0270.jpg)
★リンクテーブル★
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エメダスチン。フマル酸エメダスチン