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Technical details about Levocetirizine, learn more about the structure, uses, toxicity, action, side effects and more

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2D Structure
Also known as: 130018-87-0, Xyzal, Xusal, (r)-cetirizine dihydrochloride, Levocetirizine hcl, Levocetirizine dihydrochloride [usan]
Molecular Formula
C21H27Cl3N2O3
Molecular Weight
461.8  g/mol
InChI Key
PGLIUCLTXOYQMV-GHVWMZMZSA-N
FDA UNII
SOD6A38AGA

Levocetirizine Dihydrochloride is the dihydrochloride salt form of the active levorotatory enantiomer of cetirizine, levocetirizine; a third generation, non-sedating, selective histamine H1 receptor antagonist, with antihistamine, anti-inflammatory and potential anti-angiogenic activities. Levocetirizine competes with endogenous histamine for binding at peripheral H1-receptor sites on the effector cell surface. This prevents the negative symptoms associated with histamine release and an allergic reaction. In addition, as histamine plays an important role in angiogenesis during an allergic inflammatory reaction, blocking the action of histamine may modulate the expression of proangiogenic factors and thus may prevent angiogenesis. As a third-generation histamine H1 receptor antagonist, levocetirizine has fewer side effects than most second-generation antihistamines.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
2-[2-[4-[(R)-(4-chlorophenyl)-phenylmethyl]piperazin-1-yl]ethoxy]acetic acid;dihydrochloride
2.1.2 InChI
InChI=1S/C21H25ClN2O3.2ClH/c22-19-8-6-18(7-9-19)21(17-4-2-1-3-5-17)24-12-10-23(11-13-24)14-15-27-16-20(25)26;;/h1-9,21H,10-16H2,(H,25,26);2*1H/t21-;;/m1../s1
2.1.3 InChI Key
PGLIUCLTXOYQMV-GHVWMZMZSA-N
2.1.4 Canonical SMILES
C1CN(CCN1CCOCC(=O)O)C(C2=CC=CC=C2)C3=CC=C(C=C3)Cl.Cl.Cl
2.1.5 Isomeric SMILES
C1CN(CCN1CCOCC(=O)O)[C@H](C2=CC=CC=C2)C3=CC=C(C=C3)Cl.Cl.Cl
2.2 Other Identifiers
2.2.1 UNII
SOD6A38AGA
2.3 Synonyms
2.3.1 MeSH Synonyms

1. (2-(4-((r)-(4-chlorophenyl)phenylmethyl)piperazin-1-yl)ethoxy)acetic Acid Dihydrochloride

2. (2-(4-((r)-p-chloro-alpha-phenylbenzyl)-1-piperazinyl)ethoxy)acetic Acid

3. Acetic Acid, (2-(4-((r)-(4-chlorophenyl)phenylmethyl)-1-piperazinyl)ethoxy)-

4. Acetic Acid, (2-(4-((r)-(4-chlorophenyl)phenylmethyl)-1-piperazinyl)ethoxy)-, Dihydrochloride

5. Cetirizine (r)-form Dihydrochloride

6. Levocetirizine

7. Levocetirizine Hydrochloride

8. Levocetrizine

9. Ucb-28556

10. Xusal

11. Xyzal

2.3.2 Depositor-Supplied Synonyms

1. 130018-87-0

2. Xyzal

3. Xusal

4. (r)-cetirizine Dihydrochloride

5. Levocetirizine Hcl

6. Levocetirizine Dihydrochloride [usan]

7. Cetirizine (r)-form Dihydrochloride

8. Ucb-28556

9. Sod6a38aga

10. Ucb 28556

11. (2-(4-((r)-(4-chlorophenyl)phenylmethyl)piperazin-1-yl)ethoxy)acetic Acid Dihydrochloride

12. (r)-2-(2-(4-((4-chlorophenyl)(phenyl)methyl)piperazin-1-yl)ethoxy)acetic Acid Dihydrochloride

13. Acetic Acid, (2-(4-((r)-(4-chlorophenyl)phenylmethyl)-1-piperazinyl)ethoxy)-, Dihydrochloride

14. Nsc-758898

15. Levocetirizine Hydrochloride (jan)

16. (-)-cetirizine Dihydrochloride

17. 2-[2-[4-[(r)-(4-chlorophenyl)-phenylmethyl]piperazin-1-yl]ethoxy]acetic Acid;dihydrochloride

18. 2-[2-[4-[(r)-(4-chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]acetic Acid Dihydrochloride

19. Levocetirizine (dihydrochloride)

20. Levocetirizine Hydrochloride [jan]

21. Levocetirizine 2hcl

22. Unii-sod6a38aga

23. Levocetirizine Dihcl

24. Mfcd07366507

25. Xyzal Allergy 24hr

26. Xyzal (tn)

27. Levocetirizinedihydrochloride

28. Schembl144375

29. Chembl1201190

30. Levocetirizine Hydrochloride,(s)

31. Dtxsid30926567

32. Bcp21544

33. Ac-549

34. Levocetirizine Dihydrochloride (usp)

35. S4849

36. Akos015994681

37. Ccg-269359

38. Cs-w011557

39. Hy-w010841

40. Ks-1177

41. Nsc 758898

42. [2-[4-[(r)-(4-chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]-acetic Acid 2hcl

43. 2-[2-[4-[(r)-(4-chlorophenyl)phenylmethyl]piperazin-1-yl]ethoxy]acetic Acid Dihydrochloride

44. Levocetirizine Hydrochloride [mart.]

45. L0264

46. Levocetirizine Dihydrochloride [vandf]

47. Levocetirizine(r)-cetirizine (hydrochloride)

48. D08118

49. Levocetirizine Dihydrochloride [usp-rs]

50. Levocetirizine Dihydrochloride [who-dd]

51. Levocetirizine Dihydrochloride, >=98% (hplc)

52. Cetirizine (r)-form Dihydrochloride [mi]

53. 018l870

54. Levocetirizine Dihydrochloride [orange Book]

55. Levocetirizine Dihydrochloride [usp Monograph]

56. Q27289313

57. [2-[4-[(r)-(4-chlorophenyl)phenylmethyl]-1-piperazinyl]ethoxy]-acetic Acid Dihydrochloride

2.4 Create Date
2006-10-25
3 Chemical and Physical Properties
Molecular Weight 461.8 g/mol
Molecular Formula C21H27Cl3N2O3
Hydrogen Bond Donor Count3
Hydrogen Bond Acceptor Count5
Rotatable Bond Count8
Exact Mass460.108726 g/mol
Monoisotopic Mass460.108726 g/mol
Topological Polar Surface Area53 Ų
Heavy Atom Count29
Formal Charge0
Complexity443
Isotope Atom Count0
Defined Atom Stereocenter Count1
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count3
4 Drug and Medication Information
4.1 Drug Information
1 of 4  
Drug NameLevocetirizine dihydrochloride
Drug LabelLevocetirizine dihydrochloride, the active component of levocetirizine dihydrochloride tablets, is an orally active H1-receptor antagonist. The chemical name is R-(+)-2-[2-[4-[(4-chlorophenyl) phenyl methyl] piperazin-1-yl] ethoxy] acetic acid dihydr...
Active IngredientLevocetirizine dihydrochloride
Dosage FormTablet; Solution
RouteOral
Strength2.5mg/5ml; 5mg
Market StatusPrescription
CompanySynthon Pharms; Apotex; Hetero Labs Ltd Iii; Sciegen Pharms; Taro Pharm Inds; Sun Pharma Global; Glenmark Generics; Teva Pharms; Micro Labs Ltd India; Dr Reddys Labs; L Perrigo

2 of 4  
Drug NameXyzal
PubMed HealthLevocetirizine (By mouth)
Drug ClassesRespiratory Agent
Drug LabelLevocetirizine dihydrochloride, the active component of XYZAL tablets and oral solution, is an orally active H1receptor antagonist. The chemical name is (R)-[2-[4-[(4-chlorophenyl) phenylmethyl]-1-piperazinyl] ethoxy] acetic acid dihydrochloride....
Active IngredientLevocetirizine dihydrochloride
Dosage FormTablet; Solution
RouteOral
Strength2.5mg/5ml; 5mg
Market StatusPrescription
CompanyUcb

3 of 4  
Drug NameLevocetirizine dihydrochloride
Drug LabelLevocetirizine dihydrochloride, the active component of levocetirizine dihydrochloride tablets, is an orally active H1-receptor antagonist. The chemical name is R-(+)-2-[2-[4-[(4-chlorophenyl) phenyl methyl] piperazin-1-yl] ethoxy] acetic acid dihydr...
Active IngredientLevocetirizine dihydrochloride
Dosage FormTablet; Solution
RouteOral
Strength2.5mg/5ml; 5mg
Market StatusPrescription
CompanySynthon Pharms; Apotex; Hetero Labs Ltd Iii; Sciegen Pharms; Taro Pharm Inds; Sun Pharma Global; Glenmark Generics; Teva Pharms; Micro Labs Ltd India; Dr Reddys Labs; L Perrigo

4 of 4  
Drug NameXyzal
PubMed HealthLevocetirizine (By mouth)
Drug ClassesRespiratory Agent
Drug LabelLevocetirizine dihydrochloride, the active component of XYZAL tablets and oral solution, is an orally active H1receptor antagonist. The chemical name is (R)-[2-[4-[(4-chlorophenyl) phenylmethyl]-1-piperazinyl] ethoxy] acetic acid dihydrochloride....
Active IngredientLevocetirizine dihydrochloride
Dosage FormTablet; Solution
RouteOral
Strength2.5mg/5ml; 5mg
Market StatusPrescription
CompanyUcb

5 Pharmacology and Biochemistry
5.1 MeSH Pharmacological Classification

Histamine H1 Antagonists, Non-Sedating

A class of non-sedating drugs that bind to but do not activate histamine receptors (DRUG INVERSE AGONISM), thereby blocking the actions of histamine or histamine agonists. These antihistamines represent a heterogenous group of compounds with differing chemical structures, adverse effects, distribution, and metabolism. Compared to the early (first generation) antihistamines, these non-sedating antihistamines have greater receptor specificity, lower penetration of BLOOD-BRAIN BARRIER, and are less likely to cause drowsiness or psychomotor impairment. (See all compounds classified as Histamine H1 Antagonists, Non-Sedating.)


5.2 FDA Pharmacological Classification
5.2.1 Pharmacological Classes
Histamine-1 Receptor Antagonist [EPC]; Histamine H1 Receptor Antagonists [MoA]
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