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2D Structure
Also known as: 1977-10-2, Cloxazepine, Oxilapine, Loxitane, Loxapin, Dibenzacepin
Molecular Formula
C18H18ClN3O
Molecular Weight
327.8  g/mol
InChI Key
XJGVXQDUIWGIRW-UHFFFAOYSA-N
FDA UNII
LER583670J

An antipsychotic agent used in schizophrenia.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
8-chloro-6-(4-methylpiperazin-1-yl)benzo[b][1,4]benzoxazepine
2.1.2 InChI
InChI=1S/C18H18ClN3O/c1-21-8-10-22(11-9-21)18-14-12-13(19)6-7-16(14)23-17-5-3-2-4-15(17)20-18/h2-7,12H,8-11H2,1H3
2.1.3 InChI Key
XJGVXQDUIWGIRW-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CN1CCN(CC1)C2=NC3=CC=CC=C3OC4=C2C=C(C=C4)Cl
2.2 Other Identifiers
2.2.1 UNII
LER583670J
2.3 Synonyms
2.3.1 MeSH Synonyms

1. 2-chloro-11-(4-methyl-1-piperazinyl)-dibenz(b,f)(1,4)oxazepine

2. Cl 71,563

3. Cl-71,563

4. Cl71,563

5. Cloxazepine

6. Hydrochloride, Loxapine

7. Loxapine Hydrochloride

8. Loxapine Monohydrochloride

9. Loxapine Succinate

10. Loxapinsuccinate

11. Loxipine Maleate

12. Loxipine Succinate

13. Loxitane

14. Maleate, Loxipine

15. Oxilapine

16. Succinate, Loxapine

2.3.2 Depositor-Supplied Synonyms

1. 1977-10-2

2. Cloxazepine

3. Oxilapine

4. Loxitane

5. Loxapin

6. Dibenzacepin

7. Dibenzoazepine

8. Adasuve

9. Loxapina

10. Loxapinum

11. Sum 3170

12. Cl-62362

13. Sum-3170

14. Hf3170

15. Hf 3170

16. Lw 3170

17. 2-chloro-11-(4-methylpiperazin-1-yl)dibenzo[b,f][1,4]oxazepine

18. Dibenz[b,f][1,4]oxazepine, 2-chloro-11-(4-methyl-1-piperazinyl)-

19. S-805

20. 8-chloro-6-(4-methylpiperazin-1-yl)benzo[b][1,4]benzoxazepine

21. Chembl831

22. Cl 62,362

23. Chebi:50841

24. 2-chloro-11-(4-methyl-1-piperazinyl)dibenz(b,f)(1,4)oxazepine

25. Dibenz(b,f)(1,4)oxazepine, 2-chloro-11-(4-methyl-1-piperazinyl)-

26. Ler583670j

27. Lossapina [dcit]

28. Hydrofluoride 3170

29. 2-chloro-11-(4-methyl-1-piperazinyl)dibenz[b,f][1,4]oxazepine

30. Loxapinum [inn-latin]

31. Loxapina [inn-spanish]

32. Lossapina

33. Loxapine [usan:inn:ban]

34. Az-004

35. Loxapine (usan/inn)

36. Cl 62362

37. S 805

38. Staccato Loxapine

39. Hsdb 3111

40. Loxapine (water)

41. Loxapine (dmso)

42. Adasuve (tn)

43. Einecs 217-835-3

44. Loxitane Intramuscular

45. Brn 0626753

46. Spectrum_000355

47. 2-chloro-11-(4-methylpiperazino)dibenzo(b,f)(1,4)oxazepine

48. Cl71,563

49. Loxapine [hsdb]

50. Loxapine [usan]

51. Specplus_000823

52. 8-chloro-6-(4-methylpiperazin-1-yl)benzo[b][1,5]benzoxazepine

53. Loxapine [inn]

54. Loxapine [mi]

55. Loxapine [vandf]

56. Prestwick0_000132

57. Prestwick1_000132

58. Prestwick2_000132

59. Prestwick3_000132

60. Spectrum2_001737

61. Spectrum3_001830

62. Spectrum5_001857

63. Loxapine [mart.]

64. Loxapine [who-dd]

65. Loxitane-c Oral Suspension

66. Lopac0_000720

67. Schembl94146

68. Bspbio_000204

69. Bspbio_003479

70. Gtpl205

71. Kbioss_000835

72. Divk1c_006919

73. Unii-ler583670j

74. Spbio_001814

75. Spbio_002143

76. Loxapine [orange Book]

77. Bpbio1_000226

78. Dtxsid7023229

79. Bdbm22871

80. Kbio1_001863

81. Kbio2_000835

82. Kbio2_003403

83. Kbio2_005971

84. Kbio3_002983

85. Pdsp1_001058

86. Pdsp2_001042

87. S5197

88. Zinc19796158

89. Ccg-204805

90. Cs-1105

91. Db00408

92. Sdccgsbi-0050698.p003

93. Qtl1_000050

94. Ncgc00021145-01

95. Ncgc00021145-02

96. Ncgc00021145-03

97. Ncgc00021145-04

98. Ncgc00021145-05

99. Ncgc00021145-06

100. Ncgc00021145-07

101. Ncgc00021145-08

102. Ncgc00021145-23

103. Ncgc00022279-03

104. Ncgc00022279-04

105. Ncgc00022279-05

106. Hy-17390

107. C07104

108. D02340

109. Q58614

110. Ab00053735_15

111. Ab00053735_16

112. 977l102

113. L001085

114. Brd-k39915878-036-04-6

115. Brd-k39915878-036-05-3

116. Brd-k39915878-036-15-2

117. 2-chloro-11-(4-methylpiperazino)dibenz[b,f][1,4]oxazepine

118. 8-chloro-6-(4-methylpiperazino)benzo[b][1,4]benzoxazepine;succinic Acid

119. 13-chloro-10-(4-methylpiperazin-1-yl)-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3(8),4,6,9,12,14-heptaene

120. 13-chloro-10-(4-methylpiperazin-1-yl)-2-oxa-9-azatricyclo[9.4.0.0^{3,8}]pentadeca-1(11),3,5,7,9,12,14-heptaene

2.4 Create Date
2005-03-25
3 Chemical and Physical Properties
Molecular Weight 327.8 g/mol
Molecular Formula C18H18ClN3O
XLogP33.1
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count3
Rotatable Bond Count1
Exact Mass327.1138399 g/mol
Monoisotopic Mass327.1138399 g/mol
Topological Polar Surface Area28.1 Ų
Heavy Atom Count23
Formal Charge0
Complexity450
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count0
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Drug and Medication Information
4.1 Drug Information
1 of 2  
Drug NameAdasuve
PubMed HealthLoxapine
Drug ClassesAntipsychotic
Drug LabelADASUVE, a typical antipsychotic, is an inhalation powder of loxapine supplied in a single-use, disposable inhaler containing 10 mg of loxapine base. ADASUVE is a drug-device combination product.Active Ingredient: Loxapine (base). Loxapine, a dibenzo...
Active IngredientLoxapine
Dosage FormPowder
RouteInhalation
Strength10mg
Market StatusPrescription
CompanyTeva Pharms Usa

2 of 2  
Drug NameAdasuve
PubMed HealthLoxapine
Drug ClassesAntipsychotic
Drug LabelADASUVE, a typical antipsychotic, is an inhalation powder of loxapine supplied in a single-use, disposable inhaler containing 10 mg of loxapine base. ADASUVE is a drug-device combination product.Active Ingredient: Loxapine (base). Loxapine, a dibenzo...
Active IngredientLoxapine
Dosage FormPowder
RouteInhalation
Strength10mg
Market StatusPrescription
CompanyTeva Pharms Usa

4.2 Therapeutic Uses

Antipsychotic Agents; Dopamine Antagonists

National Library of Medicine's Medical Subject Headings online file (MeSH, 1999)


THIS DIBENZOXAZEPINE DERIVATIVE IS EFFECTIVE IN TREATMENT OF SCHIZOPHRENIA BUT IT IS NOT CLEAR WHETHER IT HAS ANY ADVANTAGE OVER OTHER ANTIPSYCHOTIC AGENTS. /SUCCINATE/

American Medical Association, AMA Department of Drugs, AMA Drug Evaluations. 3rd ed. Littleton, Massachusetts: PSG Publishing Co., Inc., 1977., p. 447


Loxapine is indicated for the management of symptoms and characteristics of psychotic conditions. /Included in US product labeling/

USP Convention. USPDI - Drug Information for the Health Care Professional. 17th ed. Volume I. Rockville, MD: Convention, Inc., 1997. (Plus Updates)., p. 1905


Loxapine has been used to treat anxiety neurosis with depression. /NOT included in US product labeling/

USP Convention. USPDI - Drug Information for the Health Care Professional. 17th ed. Volume I. Rockville, MD: Convention, Inc., 1997. (Plus Updates)., p. 1905


4.3 Drug Warning

...LOXAPINE SHOULD BE RESERVED FOR USE IN PT WHO ARE REFRACTORY TO ESTABLISHED ANTIPSYCHOTIC AGENTS. /SUCCINATE/

American Medical Association, AMA Department of Drugs, AMA Drug Evaluations. 3rd ed. Littleton, Massachusetts: PSG Publishing Co., Inc., 1977., p. 447


Safe use of loxapine during pregnancy has not been established; therefore, the drug should not be used in pregnant women or women who might become pregnant unless the potential benefits outweigh the possible risk to the woman or fetus.

McEvoy, G.K. (ed.). American Hospital Formulary Service-Drug Information 19 98. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 1998 (Plus Supplements)., p. 1891


Pending accumulation of clinical data on the use of the drug in children, loxapine is not recommended for use in children younger than 16 years of age.

McEvoy, G.K. (ed.). American Hospital Formulary Service-Drug Information 19 98. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 1998 (Plus Supplements)., p. 1891


Loxapine should be used with caution, particularly in conjunction with anticholinergic antiparkinsonian agents and in patients with glaucoma or a tendency toward urinary retention because of possible anticholinergic activity. Since loxapine may have an aniemetic effect, it is possible that the drug could mask the sign of overdosage of toxic agents or interfere with the diagnosis of such conditions as intestinal obstruction or brain tumor. Loxapine is contraindicated in comatose patients, patients who have severe CNS depression from any cause, or known hypersensitivity to the drug.

McEvoy, G.K. (ed.). American Hospital Formulary Service-Drug Information 19 98. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 1998 (Plus Supplements)., p. 1891


For more Drug Warnings (Complete) data for LOXAPINE (13 total), please visit the HSDB record page.


4.4 Minimum/Potential Fatal Human Dose

A 2500 mg ingestion ... proved fatal ...

Ellenhorn, M.J., S. Schonwald, G. Ordog, J. Wasserberger. Ellenhorn's Medical Toxicology: Diagnosis and Treatment of Human Poisoning. 2nd ed. Baltimore, MD: Williams and Wilkins, 1997., p. 667


4.5 Drug Indication

For the management of the manifestations of psychotic disorders such as schizophrenia


Adasuve is indicated for the rapid control of mild-to-moderate agitation in adult patients with schizophrenia or bipolar disorder. Patients should receive regular treatment immediately after control of acute agitation symptoms.


5 Pharmacology and Biochemistry
5.1 Pharmacology

Loxapine, a dibenzoxazepine compound, represents a subclass of tricyclic antipsychotic agents, chemically distinct from the thioxanthenes, butyrophenones, and phenothiazines. Pharmacologically, Loxapine is a tranquilizer for which the exact mode of action has not been established, however, it is believed that by antagonising dopamine and serotonin receptors, there is a marked cortical inhibition which can manifest as tranquilization and suppression of aggression.


5.2 MeSH Pharmacological Classification

Antipsychotic Agents

Agents that control agitated psychotic behavior, alleviate acute psychotic states, reduce psychotic symptoms, and exert a quieting effect. They are used in SCHIZOPHRENIA; senile dementia; transient psychosis following surgery; or MYOCARDIAL INFARCTION; etc. These drugs are often referred to as neuroleptics alluding to the tendency to produce neurological side effects, but not all antipsychotics are likely to produce such effects. Many of these drugs may also be effective against nausea, emesis, and pruritus. (See all compounds classified as Antipsychotic Agents.)


Dopamine Antagonists

Drugs that bind to but do not activate DOPAMINE RECEPTORS, thereby blocking the actions of dopamine or exogenous agonists. Many drugs used in the treatment of psychotic disorders (ANTIPSYCHOTIC AGENTS) are dopamine antagonists, although their therapeutic effects may be due to long-term adjustments of the brain rather than to the acute effects of blocking dopamine receptors. Dopamine antagonists have been used for several other clinical purposes including as ANTIEMETICS, in the treatment of Tourette syndrome, and for hiccup. Dopamine receptor blockade is associated with NEUROLEPTIC MALIGNANT SYNDROME. (See all compounds classified as Dopamine Antagonists.)


5.3 ATC Code

N05AH01


N - Nervous system

N05 - Psycholeptics

N05A - Antipsychotics

N05AH - Diazepines, oxazepines, thiazepines and oxepines

N05AH01 - Loxapine


5.4 Absorption, Distribution and Excretion

Absorption

Systemic bioavailability of the parent drug was only about one third that after an equivalent intramuscular dose (25 mg base) in male volunteers


Route of Elimination

Metabolites are excreted in the urine in the form of conjugates and in the feces unconjugated.


Animal studies with radioactive drug indicate that loxapine and/or its metabolites are widely distributed in body tissues with highest concentrations in brain, lungs, heart, liver, and pancreas. The drug appears in the CSF.

McEvoy, G.K. (ed.). American Hospital Formulary Service-Drug Information 19 98. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 1998 (Plus Supplements)., p. 1890


Loxapine is rapidly and almost completely absorbed from the GI tract. The drug is also almost completely absorbed following IM administration.

McEvoy, G.K. (ed.). American Hospital Formulary Service-Drug Information 19 98. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 1998 (Plus Supplements)., p. 1889


RAPIDLY & ALMOST COMPLETELY ABSORBED FROM GI TRACT. PEAK LOXAPINE SERUM LEVELS /WITHIN 2 HR, RANGE FROM 0.006 TO 0.013 MCG/ML AFTER/ 25 MG ORAL DOSE...MAJOR /ACTIVE/ METABOLITE IN SERUM IS 8-HYDROXYLOXAPINE /MAX CONCN 0.012-0.038 MCG/ML WITHIN 2-4 HR AFTER ORAL LOXAPINE. HUMAN/

American Society of Hospital Pharmacists. Data supplied on contract from American Hospital Formulary Service and other current ASHP sources., p. 1976


LOXAPINE AND/OR METABOLITES...WIDELY DISTRIBUTED IN BODY TISSUES...HIGHEST CONCN IN BRAIN, LUNGS, HEART, LIVER, & PANCREAS...APPEARS IN CSF...CROSSES PLACENTA...IN MILK OF NURSING MOTHERS /ANIMALS, RADIOACTIVE DRUG/

American Society of Hospital Pharmacists. Data supplied on contract from American Hospital Formulary Service and other current ASHP sources., p. 1976


METABOLITES /7- & 8-HYDROXY-, 7- & 8-HYDROXYDESMETHYLLOXAPINE; N-OXIDES OF LOXAPINE, 7- & 8-HYDROXYLOXAPINE/ EXCRETED IN URINE & FECES. LITTLE OR NO UNMETABOLIZED DRUG...FOUND...METABOLITES /PRIMARILY GLUCURONIDE OR SULFATE CONJUGATES IN URINE, PRIMARILY UNCONJUGATED IN FECES. HUMAN, ORAL/

American Society of Hospital Pharmacists. Data supplied on contract from American Hospital Formulary Service and other current ASHP sources., p. 1976


5.5 Metabolism/Metabolites

Hepatic


RAPIDLY & EXTENSIVELY METABOLIZED IN LIVER BY AROMATIC HYDROXYLATION, N-DEMETHYLATION & N-OXIDATION. MAJOR METABOLITES...8-HYDROXYLOXAPINE, & 7-HYDROXYLOXAPINE WHICH ARE ACTIVE...8-HYDROXYDESMETHYLLOXAPINE, 7-HYDROXYDESMETHYLLOXAPINE & LOXAPINE-N-OXIDE WHICH ARE INACTIVE /HUMAN, ORAL/

American Society of Hospital Pharmacists. Data supplied on contract from American Hospital Formulary Service and other current ASHP sources., p. 1976


SIGNIFICANT AMT OF N-OXIDES OF /7-HYDROXY- & 8-HYDROXYLOXAPINES, METABOLITES FORMED BY HYDROXYLATION & N-OXIDATION/, PRESENT...LOXAPINE METABOLITES ARE EXCRETED IN URINE PRIMARILY AS GLUCURONIDE OR SULFATE CONJUGATES /HUMAN, ORAL/

American Society of Hospital Pharmacists. Data supplied on contract from American Hospital Formulary Service and other current ASHP sources., p. 1976


2 METABOLITES: 8-HYDROXYLOXAPINE & 8-HYDROXYAMOXAPINE, INCR ON ORAL MEDICATION.

SAKALIS G, GERSHON S; PARENTERAL LOXAPINE IN ACUTE SCHIZOPHRENIA; CURR THER RES CLIN EXP 25(FEB) 330-4 (1979)


Loxapine is rapidly and extensively metabolized in the liver by aromatic hydroxylation, N-oxidation. The major metabolites of loxapine are 8-hydroxyloxapine and 7-hydroxyloxapine which are active and 8-hydroxydesmethylloxapine, 7-hydroxydesmethylloxapine, and loxapine N-oxide which are inactive. Significant amounts of the N-oxides of the hydroxyloxapines are also present.

McEvoy, G.K. (ed.). American Hospital Formulary Service-Drug Information 19 98. Bethesda, MD: American Society of Health-System Pharmacists, Inc. 1998 (Plus Supplements)., p. 1890


Loxepine has known human metabolites that include Loxepine N-glucuronide.

S73 | METXBIODB | Metabolite Reaction Database from BioTransformer | DOI:10.5281/zenodo.4056560


5.6 Biological Half-Life

Oral-4 hours


SERUM LEVELS OF LOXAPINE & METABOLITES DECLINE IN BIPHASIC MANNER. HALF-LIFE DURING 1ST PHASE...5 HR...DURING 2ND PHASE...19 HR. /AFTER SINGLE 25 MG ORAL DOSE, SEDATIVE EFFECT BEGINS IN 20-30 MIN; PEAK EFFECT WITHIN 1.5-3 HR; DURATION APPROX 12 HR. HUMAN/

American Society of Hospital Pharmacists. Data supplied on contract from American Hospital Formulary Service and other current ASHP sources., p. 1976


5.7 Mechanism of Action

Loxapine is a dopamine antagonist, and also a serotonin 5-HT2 blocker. The exact mode of action of Loxapine has not been established, however changes in the level of excitability of subcortical inhibitory areas have been observed in several animal species in association with such manifestations of tranquilization as calming effects and suppression of aggressive behavior.


STUDIES HAVE SHOWN THAT LOXAPINE PRODUCES SEDATION & PRONOUNCED EXTRAPYRAMIDAL REACTIONS, DECR CONVULSIVE THRESHOLD, & HAS ANTIADRENERGIC & ANTICHOLINERGIC EFFECTS. /SUCCINATE/

American Medical Association, AMA Department of Drugs, AMA Drug Evaluations. 3rd ed. Littleton, Massachusetts: PSG Publishing Co., Inc., 1977., p. 447