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2D Structure
Also known as: 15574-96-6, Pizotyline, Sandomigran, Litec, Sandomygran, Bc-105
Molecular Formula
C19H21NS
Molecular Weight
295.4  g/mol
InChI Key
FIADGNVRKBPQEU-UHFFFAOYSA-N
FDA UNII
0BY8440V3N

Serotonin antagonist used against MIGRAINE DISORDERS and vascular headaches.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
1-methyl-4-(6-thiatricyclo[8.4.0.03,7]tetradeca-1(14),3(7),4,10,12-pentaen-2-ylidene)piperidine
2.1.2 InChI
InChI=1S/C19H21NS/c1-20-11-8-15(9-12-20)19-16-5-3-2-4-14(16)6-7-18-17(19)10-13-21-18/h2-5,10,13H,6-9,11-12H2,1H3
2.1.3 InChI Key
FIADGNVRKBPQEU-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CN1CCC(=C2C3=C(CCC4=CC=CC=C42)SC=C3)CC1
2.2 Other Identifiers
2.2.1 UNII
0BY8440V3N
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Bc 105

2. Bc-105

3. Bc105

4. Pizotyline

5. Polomigran

6. Sandomigran

2.3.2 Depositor-Supplied Synonyms

1. 15574-96-6

2. Pizotyline

3. Sandomigran

4. Litec

5. Sandomygran

6. Bc-105

7. Pizotyline [usan]

8. Pizotifenum

9. Pizotifene

10. Pizotifeno

11. Bc 105

12. Pizotifan

13. 4-(9,10-dihydro-4h-benzo[4,5]cyclohepta[1,2-b]thiophen-4-ylidene)-1-methylpiperidine

14. Pizotifen [inn]

15. 4-(9,10-dihydro-4h-benzo[4,5]cyclohepta[1,2-b]thien-4-ylidene)-1-methylpiperidine

16. Piperidine, 4-(9,10-dihydro-4h-benzo(4,5)cyclohepta(1,2-b)thien-4-ylidene)-1-methyl-

17. Chebi:50212

18. 0by8440v3n

19. Pizotifen (inn)

20. Sanomigran

21. Pizotyline (usan)

22. 4-(9,10-dihydro-4h-benzo(4,5)cyclohepta(1,2-b)thien-4-ylidene)-1-methylpiperidine

23. Piperidine, 4-(9,10-dihydro-4h-benzo[4,5]cyclohepta[1,2-b]thien-4-ylidene)-1-methyl-

24. Ncgc00163169-01

25. Sandomigran (tn)

26. Dsstox_cid_3490

27. Dsstox_rid_77051

28. Dsstox_gsid_23490

29. Pizotifene [inn-french]

30. Pizotifenum [inn-latin]

31. Pizotifeno [inn-spanish]

32. 1-methyl-4-{6-thiatricyclo[8.4.0.0^{3,7}]tetradeca-1(10),3(7),4,11,13-pentaen-2-ylidene}piperidine

33. Cas-15574-96-6

34. Einecs 239-632-9

35. Brn 0753534

36. Pizotylline

37. Sandomigram

38. Sanmigran

39. Unii-0by8440v3n

40. 4-[9,10-dihydro-4h-benzo[4,5]cyclohepta[1,2-b]thien-4-ylidene]-1-methylpiperidine

41. Mfcd00864192

42. Pizotyline [mi]

43. Biomol-nt_000102

44. Gtpl93

45. Pizotifen [mart.]

46. Pizotifen [who-dd]

47. Oprea1_684518

48. Schembl44122

49. Mls006011927

50. Pizotyline Maleate (salt/mix)

51. Bpbio1_001391

52. Chembl294951

53. Zinc1968

54. Dtxsid6023490

55. Pizotifen, >=98% (hplc)

56. Bdbm82088

57. Bcp14794

58. Hy-b0115

59. Tox21_112024

60. Bbl009911

61. Nsc_27400

62. Pdsp1_001602

63. Pdsp2_001586

64. S5770

65. Stk801341

66. Akos005612964

67. Tox21_112024_1

68. Cs-1870

69. Db06153

70. Sb43212

71. Ncgc00163169-02

72. Ncgc00163169-03

73. Ncgc00163169-05

74. 1-methyl-4-(6-thiatricyclo[8.4.0.03,7]tetradeca-1(14),3(7),4,10,12-pentaen-2-ylidene)piperidine

75. Ac-11996

76. As-13328

77. Bp164276

78. Smr004703517

79. Sbi-0206788.p001

80. Cas_15574-96-6

81. Db-043288

82. Ab00514749

83. Ft-0637249

84. Ft-0655575

85. P2344

86. D05523

87. T71852

88. Ab00514749_11

89. Ab00514749_12

90. 574p966

91. L000722

92. Q413784

93. W-108016

94. Brd-k75958195-001-01-7

95. Brd-k75958195-037-03-7

96. Brd-k75958195-037-04-5

97. 4-(9,10-dihydro-1-thiabenzo[f]azulen-4-ylidene)-1-methylpiperidine

98. 4-oxo-9,10-dihydro-4h-benzo(4,5) Cyclohepto(1,2,b)thiophene

99. 4-oxo-9,10-dihydro-4h-benzo(4,5) Cyclohepto(1,2,b) Thiophene

100. 4-(4,5-dihydrobenzo[1,2]cyclohepta[2,4-b]thiophen-10-ylidene)-1-methylpiperidine

101. 1-methyl-4-(6-thiatricyclo[8.4.0.0^{3,7]tetradeca-1(14),3(7),4,10,12-pentaen-2-ylidene)piperidine

102. 1-methyl-4-{6-thiatricyclo[8.4.0.0?,?]tetradeca-1(14),3(7),4,10,12-pentaen-2-ylidene}piperidine

103. 1-methyl-4-{6-thiatricyclo[8.4.0.0^{3,7}]tetradeca-1(14),3(7),4,10,12-pentaen-2-ylidene}piperidine

104. 4-(9,10-dihydro-4h-benzo[4,5]cyclohepta[1,2-b]thiophen-4-ylidene)-1-methylpiperidine (c4h6o5)

2.4 Create Date
2005-03-26
3 Chemical and Physical Properties
Molecular Weight 295.4 g/mol
Molecular Formula C19H21NS
XLogP33.8
Hydrogen Bond Donor Count0
Hydrogen Bond Acceptor Count2
Rotatable Bond Count0
Exact Mass295.13947085 g/mol
Monoisotopic Mass295.13947085 g/mol
Topological Polar Surface Area31.5 Ų
Heavy Atom Count21
Formal Charge0
Complexity406
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 Indication

Indicated for the prophylactic management of migraines.


5 Pharmacology and Biochemistry
5.1 Pharmacology

Various studies have shown pizotifen to be effective in the prophylaxis of migraines in reducing the frequency and severity of vascular headaches. Evidence from studies _in vivo_ and _in vitro_ demonstrate antagonistic actions towards serotonin and histamine. Pizotifen blocks the postsynaptic 5-HT2 receptors, as supported by antagonism of several direct agonists of 5-HT receptors. It is an antagonist at histamine H1 receptors, and is weakly anticholinergic. It also binds to 1- and 2-adrenergic receptors, and dopamine receptors. Pizotifen elicits a minimal effect as an epinephrine or bradykinin antagonist. Pizotifen exhibits weak sedative properties in mouse and monkey studies, as indicated by inhibition of locomotion and potentiation of barbiturates, without changes in cardiac or respiratory rates. In dogs, intravenous administration of pizotifen cause rapid hypotension but was reversed to normal within 30 minutes. Pizotifen was shown to inhibit serotonin uptake in the isolated perfused cat spleen and, _in vivo_, inhibits serotonin-induced contractions in rat uterus and cat nictiating membrane. In contrast, pizotifen demonstrated a venoconstrictor activity _in vivo_ when orally or intravenously administered to saphenous veins in conscious dogs. Pizotifen has the potential to stimulate the appetite and may cause weight gain upon treatment. In a double-blind clinical study of patients with mild to moderate depression, treatment of pizotifen led to clinical improvement of the depressive symptoms. However, deterioration of the schizophrenic emotional symptoms was also observed in patients with depression and chronic schizophrenia. This indicates that pizotifen may potentially improve the symptoms of patients with depressions in conjunction with migraines. Neuroprotective effect of pizotifen was investigated _in vitro_ in a mouse cell model of Huntington's disease (HD). According to a chemical screen of a mouse HdhQ111/Q111 striatal cell model of HD, treatment of pizotifen was associated with increased ATP levels and decreased activation of caspase-3, leading to enhanced cell viability. Transient activation of ERK signalling pathway lasting for less than 3 hours was also observed. In the R6/2 transgenic mouse model of HD, rotarod performance of the mouse treated with pizotifen was seen, accompanied by an increase in DARPP-32 protein expression and restoration of striatal area. However these effects being reflected _in vivo_ are not established.


5.2 MeSH Pharmacological Classification

Serotonin Antagonists

Drugs that bind to but do not activate serotonin receptors, thereby blocking the actions of serotonin or SEROTONIN RECEPTOR AGONISTS. (See all compounds classified as Serotonin Antagonists.)


Antidepressive Agents

Mood-stimulating drugs used primarily in the treatment of affective disorders and related conditions. Several MONOAMINE OXIDASE INHIBITORS are useful as antidepressants apparently as a long-term consequence of their modulation of catecholamine levels. The tricyclic compounds useful as antidepressive agents (ANTIDEPRESSIVE AGENTS, TRICYCLIC) also appear to act through brain catecholamine systems. A third group (ANTIDEPRESSIVE AGENTS, SECOND-GENERATION) is a diverse group of drugs including some that act specifically on serotonergic systems. (See all compounds classified as Antidepressive Agents.)


Analgesics, Non-Narcotic

A subclass of analgesic agents that typically do not bind to OPIOID RECEPTORS and are not addictive. Many non-narcotic analgesics are offered as NONPRESCRIPTION DRUGS. (See all compounds classified as Analgesics, Non-Narcotic.)


5.3 ATC Code

N - Nervous system

N02 - Analgesics

N02C - Antimigraine preparations

N02CX - Other antimigraine preparations

N02CX01 - Pizotifen


5.4 Absorption, Distribution and Excretion

Absorption

The absorption half-life of pizotifen following oral administration is 0.5 to 0.8 hours in an adult male with nearly complete absorption rate of 80%. Maximum blood levels are reached 5 hours post-administration and the absolute bioavailability is 78%.


Route of Elimination

About one third of the total orally administered dose is excreted into the feces. Less than 1% of the total dose is excreted in the urine as the unchanged parent drug, and up to 55% of the dose is excreted as its metabolites.


Volume of Distribution

The volume of distribution in an adult male is 833L for pizotifen and 70L for the N-glucuronide conjugate.


5.5 Metabolism/Metabolites

Pizotifen is extensively metabolized in the liver, where it primarily undergoes N-glucuronidation to form the main metabolite, N-glucuronide conjugate. N-glucuronide conjugate accounts for at least 50% of the plasma and 60-70% of the urinary-excreted radioactivity.


5.6 Biological Half-Life

The elimination half-life for pizotifen and N-glucuronide conjugate is about 23 hours.


5.7 Mechanism of Action

While the mechanism of action is not fully understood, it is proposed that pizotifen works by inhibiting the peripheral actions of serotonin and histamine in increasing the membrane permeability of cranial vessels and transudation of plasmakinin, while altering pain thresholds in migraines. By blocking 5-HT receptors, pizotifen attenuates the signalling of serotonin in causing cranial vasoconstriction, as well as serotonin-enhanced platelet function and aggregation. There is evidence that it also inhibits the peripheral actions of bradykinin. Pizotifen may inhibit serotonin reuptake by blood platelets, which affects the tonicity and decreases passive distension of extracranial arteries. The effects of pizotifen leading to appetite stimulation may be due to the drug acting at the metabolic level rather than a direct stimulation of the appetite centre.