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2D Structure
Also known as: 721-50-6, Propitocaine, Citanest, Prilocainum, Prilocaine base, N-(2-methylphenyl)-2-(propylamino)propanamide
Molecular Formula
C13H20N2O
Molecular Weight
220.31  g/mol
InChI Key
MVFGUOIZUNYYSO-UHFFFAOYSA-N
FDA UNII
046O35D44R

A local anesthetic that is similar pharmacologically to LIDOCAINE. Currently, it is used most often for infiltration anesthesia in dentistry.
Prilocaine is an Amide Local Anesthetic. The physiologic effect of prilocaine is by means of Local Anesthesia.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
N-(2-methylphenyl)-2-(propylamino)propanamide
2.1.2 InChI
InChI=1S/C13H20N2O/c1-4-9-14-11(3)13(16)15-12-8-6-5-7-10(12)2/h5-8,11,14H,4,9H2,1-3H3,(H,15,16)
2.1.3 InChI Key
MVFGUOIZUNYYSO-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CCCNC(C)C(=O)NC1=CC=CC=C1C
2.2 Other Identifiers
2.2.1 UNII
046O35D44R
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Citanest

2. Citanest Octapressin

3. Prilocaine Hydrochloride

4. Propitocaine

5. Xylonest

2.3.2 Depositor-Supplied Synonyms

1. 721-50-6

2. Propitocaine

3. Citanest

4. Prilocainum

5. Prilocaine Base

6. N-(2-methylphenyl)-2-(propylamino)propanamide

7. Astra 1515

8. O-methyl-2-propylaminopropionanilide

9. Propanamide, N-(2-methylphenyl)-2-(propylamino)-

10. Prilocaina

11. 2-(propylamino)-o-propionotoluidide

12. O-propionotoluidide, 2-(propylamino)-

13. Astra 1512

14. O-methyl-alpha-propylaminopropionanilide

15. 2-methyl-alpha-propylaminopropionanilide

16. Alpha-n-propylamino-2-methylpropionanilide

17. Nsc 40027

18. Propitocaine (jan)

19. Chebi:8404

20. 2-(propylamino)-n-(o-tolyl)propanamide

21. 2-methyl-.alpha.-propylaminopropionanilide

22. Nsc-40027

23. Astra-1512

24. Astra-1515

25. O-propionotuluidide, 2-propylamino-

26. 046o35d44r

27. Prilocaine [usan]

28. Propitocaine [jan]

29. Prilocainum [inn-latin]

30. Prilocaina [inn-spanish]

31. L-67

32. (+/-)-prilocaine

33. Hsdb 3386

34. Prilocaine (usp/inn)

35. O-propionotoluidide, 2-propylamino-

36. Einecs 211-957-0

37. Brn 2108498

38. Prilotekal

39. Unii-046o35d44r

40. Prilocaine [usan:usp:inn:ban]

41. N-(2-methylphenyl)-n2-propylalaninamide

42. Spectrum_001649

43. L 67

44. Prilocaine [mi]

45. Prilocaine [inn]

46. N-(2-methylphenyl)-n(2)-propylalaninamide

47. N-(2-methylphenyl)-n~2~-propylalaninamide

48. Prestwick0_000199

49. Prestwick1_000199

50. Prestwick2_000199

51. Prestwick3_000199

52. Spectrum2_001549

53. Spectrum3_001052

54. Spectrum4_001192

55. Spectrum5_001175

56. (.+/-.)-prilocaine

57. Prilocaine [hsdb]

58. Prilocaine [vandf]

59. Prilocaine [mart.]

60. Chembl1194

61. Prilocaine [usp-rs]

62. Prilocaine [who-dd]

63. Lopac0_001005

64. Schembl25467

65. Bspbio_000157

66. Bspbio_002604

67. Kbiogr_001883

68. Kbioss_002129

69. Divk1c_000846

70. Spbio_001398

71. Spbio_002078

72. Bpbio1_000173

73. Gtpl7276

74. Dl-(+/-)-prilocaine

75. Emla Component Prilocaine

76. Dtxsid7031955

77. Prilocaine [orange Book]

78. Kbio1_000846

79. Kbio2_002129

80. Kbio2_004697

81. Kbio2_007265

82. Kbio3_001824

83. Prilocaine [ep Monograph]

84. Ninds_000846

85. Oraqix Component Prilocaine

86. Hms3604h09

87. Hms3651m13

88. Hms3884a04

89. Prilocaine [usp Monograph]

90. Act04759

91. Fortacin Component Prilocaine

92. Hy-b0137

93. Nsc40027

94. Prilocaine Component Of Emla

95. Bdbm50225477

96. Mfcd00048681

97. S1619

98. Stl257086

99. 2-(propylamino)-n-o-tolylpropanamide

100. Prilocaine Component Of Oraqix

101. Akos015889404

102. Ac-2100

103. Ccg-205085

104. Cs-1929

105. Db00750

106. Prilocaine Component Of Fortacin

107. Sdccgsbi-0050978.p004

108. Idi1_000846

109. Ncgc00015860-02

110. Ncgc00015860-03

111. Ncgc00015860-15

112. Ncgc00162312-01

113. As-14851

114. O-methyl-.alpha.-propylaminopropionanilide

115. Sbi-0050978.p003

116. Db-055611

117. Ab00053665

118. Ft-0603506

119. Ft-0660568

120. Sw196783-3

121. .alpha.-n-propyl-amino-2-methylpropionanilide

122. 86p818

123. C07531

124. D00553

125. Ab00053665-12

126. Ab00053665_13

127. Ab00053665_14

128. A837435

129. N-(2-methylphenyl)-2-(propylamino)propanamide #

130. Q413598

131. N-(2-methylphenyl)-2-(propylamino)propanimidic Acid

132. Q-100809

133. Brd-a53952395-003-05-3

134. Brd-a53952395-003-15-2

135. (+/-)-n-(2-propylaminopropionyl)-2-toluidine

136. N-(2,6-dimethylphenyl)-2-(propylamino)propanamide

2.4 Create Date
2005-03-25
3 Chemical and Physical Properties
Molecular Weight 220.31 g/mol
Molecular Formula C13H20N2O
XLogP32.1
Hydrogen Bond Donor Count2
Hydrogen Bond Acceptor Count2
Rotatable Bond Count5
Exact Mass220.157563266 g/mol
Monoisotopic Mass220.157563266 g/mol
Topological Polar Surface Area41.1 Ų
Heavy Atom Count16
Formal Charge0
Complexity218
Isotope Atom Count0
Defined Atom Stereocenter Count0
Undefined Atom Stereocenter Count1
Defined Bond Stereocenter Count0
Undefined Bond Stereocenter Count0
Covalently Bonded Unit Count1
4 Drug and Medication Information
4.1 Therapeutic Uses

Anesthetics, Local

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


AN AGENT CHEMICALLY SIMILAR TO LIDOCAINE & MEPIVACAINE USED FOR LOCAL & REGIONAL-BLOCK ANESTHESIA. IN ONSET OF ACTION & EFFECTIVENESS 1-3% SOLN... EQUIVALENT TO LIDOCAINE & MEPIVACAINE IN 1%-2% CONCN. ITS DURATION OF ACTION IS INTERMEDIATE TO SHORTER-ACTING LIDOCAINE & LONGER-ACTING MEPIVACAINE. /PRILOCAINE HCL/

Osol, A. and J.E. Hoover, et al. (eds.). Remington's Pharmaceutical Sciences. 15th ed. Easton, Pennsylvania: Mack Publishing Co., 1975., p. 994


PRILOCAINE HYDROCHLORIDE ... HAS BEEN EMPLOYED ... FOR SPINAL ANESTHESIA. /PRILOCAINE HCL/

Goodman, L.S., and A. Gilman. (eds.) The Pharmacological Basis of Therapeutics. 5th ed. New York: Macmillan Publishing Co., Inc., 1975., p. 390


... ACT ON ANY PART OF THE NERVOUS SYSTEM & ON EVERY TYPE OF NERVE FIBER. /LOCAL ANESTHETICS/

Hardman, J.G., L.E. Limbird, P.B. Molinoff, R.W. Ruddon, A.G. Goodman (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 9th ed. New York, NY: McGraw-Hill, 1996., p. 331


For more Therapeutic Uses (Complete) data for PRILOCAINE (10 total), please visit the HSDB record page.


4.2 Drug Warning

AS WITH OTHER LOCAL ANESTHETICS, PRILOCAINE HCL IS CONTRAINDICATED IN PRESENCE OF SHOCK, SEVERE CARDIOVASCULAR DISEASE, OR HEART BLOCK. /PRILOCAINE HCL/

Osol, A. and J.E. Hoover, et al. (eds.). Remington's Pharmaceutical Sciences. 15th ed. Easton, Pennsylvania: Mack Publishing Co., 1975., p. 994


... SHOULD NOT BE ADMIN TO PT WITH IDIOPATHIC OR CONGENITAL METHEMOGLOBINEMIA, ANEMIA, OR CARDIAC OR VENTILATORY FAILURE WITH HYPOXIA; IT SHOULD BE USED WITH CAUTION FOR CONTINUOUS EPIDURAL ANESTHESIA SINCE THE METHEMOGLOBINEMIC EFFECT OF INDIVIDUAL DOSES IS ADDITIVE. /PRILOCAINE HCL/

American Medical Association, Council on Drugs. AMA Drug Evaluations Annual 1994. Chicago, IL: American Medical Association, 1994., p. 170


IN PRESENCE OF HEMORRHAGE, SYMPATHETIC BLOCK PRODUCED BY EPIDURAL ANESTHESIA BECOMES EXTREMELY SIGNIFICANT & MAY RESULT IN RAPID & DELETERIOUS CIRCULATORY CHANGES. /LOCAL ANESTHETICS/

Goodman, L.S., and A. Gilman. (eds.) The Pharmacological Basis of Therapeutics. 5th ed. New York: Macmillan Publishing Co., Inc., 1975., p. 399


TWO OUTSTANDING DANGERS /OF CAUDAL ANESTHESIA/ ARE (1) INTRODUCING NEEDLE INTO VENOUS PLEXUS LINING SACRAL CANAL, WITH RESULTANT INTRAVASCULAR INJECTION OF DRUG, & (2) PENETRATING DURA, WITH DEVELOPMENT OF HIGH LEVEL OF SPINAL ANESTHESIA. /LOCAL ANESTHETICS/

Goodman, L.S., and A. Gilman. (eds.) The Pharmacological Basis of Therapeutics. 5th ed. New York: Macmillan Publishing Co., Inc., 1975., p. 399


For more Drug Warnings (Complete) data for PRILOCAINE (16 total), please visit the HSDB record page.


4.3 Drug Indication

Used as a local anaesthetic and is often used in dentistry.


5 Pharmacology and Biochemistry
5.1 Pharmacology

Prilocaine binds to the intracellular surface of sodium channels which blocks the subsequent influx of sodium into the cell. Action potential propagation and never function is, therefore, prevented. This block is reversible and when the drug diffuses away from the cell, sodium channel function is restored and nerve propagation returns.


5.2 MeSH Pharmacological Classification

Anesthetics, Local

Drugs that block nerve conduction when applied locally to nerve tissue in appropriate concentrations. They act on any part of the nervous system and on every type of nerve fiber. In contact with a nerve trunk, these anesthetics can cause both sensory and motor paralysis in the innervated area. Their action is completely reversible. (From Gilman AG, et. al., Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed) Nearly all local anesthetics act by reducing the tendency of voltage-dependent sodium channels to activate. (See all compounds classified as Anesthetics, Local.)


5.3 FDA Pharmacological Classification
5.3.1 Active Moiety
PRILOCAINE
5.3.2 FDA UNII
046O35D44R
5.3.3 Pharmacological Classes
Physiologic Effects [PE] - Local Anesthesia
5.4 ATC Code

N01BB04

S76 | LUXPHARMA | Pharmaceuticals Marketed in Luxembourg | Pharmaceuticals marketed in Luxembourg, as published by d'Gesondheetskeess (CNS, la caisse nationale de sante, www.cns.lu), mapped by name to structures using CompTox by R. Singh et al. (in prep.). List downloaded from https://cns.public.lu/en/legislations/textes-coordonnes/liste-med-comm.html. Dataset DOI:10.5281/zenodo.4587355


N - Nervous system

N01 - Anesthetics

N01B - Anesthetics, local

N01BB - Amides

N01BB04 - Prilocaine


5.5 Absorption, Distribution and Excretion

Route of Elimination

Prilocaine is metabolized in both the liver and the kidney and excreted via the kidney.


/CONCERNING/ HYDROLYSIS OF AMIDE BOND OF PRILOCAINE... PLASMA CONCN OF R-(-)-ENANTIOMER WERE FOUND TO BE LOWER THAN THOSE OF THE S-(+)-ENANTIOMER AFTER IV ADMIN TO CAT. IN VITRO STUDIES USING LIVER PREPN FROM VARIOUS MAMMALS CONFIRMED THE R-(-)-ISOMER TO BE HYDROLYZED @ MUCH HIGHER RATES THAN THE S-(+) FORM...

Testa, B. and P. Jenner. Drug Metabolism: Chemical & Biochemical Aspects. New York: Marcel Dekker, Inc., 1976., p. 241


THERE IS...MORE RAPID PRODN OF METHEMOGLOBINEMIA BY D-(-) FORM, CAUSED PRESUMABLY BY HIGHER BLOOD LEVELS OF HYDROLYSIS PRODUCT, O-TOLUIDINE.

The Chemical Society. Foreign Compound Metabolism in Mammals. Volume 2: A Review of the Literature Published Between 1970 and 1971. London: The Chemical Society, 1972., p. 375


PRILOCAINE FETAL/MATERNAL CONCN RATIO: 1.0 /FROM TABLE/

LaDu, B.N., H.G. Mandel, and E.L. Way. Fundamentals of Drug Metabolism and Disposition. Baltimore: Williams and Wilkins, 1971., p. 100


PRILOCAINE DOSE 0.2 G IV GAVE BLOOD CONCN 0.26 MG% @ 0.3 HR & 0.14 MG% @ 0.17 HR; DOSE 0.4 G IV GAVE BLOOD CONCN 0.15 MG% @ 0.12 HR & 0.08 MG% @ 0.33 HR; DOSE 0.4 G EPIDURAL BLOCK GAVE BLOOD CONCN 0.26 MG% @ 0.25 HR (PEAK); DOSE 0.4 G INTERCOSTAL BLOCK GAVE BLOOD CONCN 0.40 MG% @ 0.25 HR. /FROM TABLE/

Sunshine, I. (ed.). CRC Handbook of Analytical Toxicology. Cleveland: The Chemical Rubber Co., 1969., p. 370


5.6 Metabolism/Metabolites

The amide-linked local anesthetics are, in general, degraded by the hepatic endoplasmic reticulum, the initial reactions involving N-dealkylation and subsequent hydrolysis. However, with prilocaine, the initial step is hydrolytic, forming o-toluidine metabolites that can cause methemoglobinemia.

Hardman, J.G., L.E. Limbird, P.B. Molinoff, R.W. Ruddon, A.G. Goodman (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 9th ed. New York, NY: McGraw-Hill, 1996., p. 338


BIOTRANSFORMATION OF PRILOCAINE...IN RATS GAVE O-TOLUIDINE & N-PROPYLALANINE.

The Chemical Society. Foreign Compound Metabolism in Mammals. Volume 1: A Review of the Literature Published Between 1960 and 1969. London: The Chemical Society, 1970., p. 244


5.7 Biological Half-Life

MEPIVACAINE-HCL (I-HCL) & PRILOCAINE-HCL (II-HCL) WERE INFUSED IV 250 MG INTO HEALTHY VOLUNTEERS. T/2 FOR I WAS GENERALLY LONGER THAN II; TOTAL BODY CLEARANCE II CONSISTENTLY GREATER THAN I. II CLEARANCE EXCEEDED NORMAL HEPATIC BLOOD FLOW: EXTRA-HEPATIC METAB SITE IS POSTULATED.

ARTHUR ET AL; BR J ANAESTH 51(6) 481 (1979)


5.8 Mechanism of Action

Prilocaine acts on sodium channels on the neuronal cell membrane, limiting the spread of seizure activity and reducing seizure propagation. The antiarrhythmic actions are mediated through effects on sodium channels in Purkinje fibers.


... BLOCK CONDUCTION IN NERVE PERHAPS BY COMPETING WITH CA @ SOME SITE THAT CONTROLS PERMEABILITY OF MEMBRANE ... CA IS ALSO INVOLVED IN ACTION OF LOCAL ANESTHETICS ON SMOOTH MUSCLE ... & ON ADRENAL MEDULLA ... /LOCAL ANESTHETICS/

Goodman, L.S., and A. Gilman. (eds.) The Pharmacological Basis of Therapeutics. 5th ed. New York: Macmillan Publishing Co., Inc., 1975., p. 380


... PREVENT THE GENERATION & THE CONDUCTION OF THE NERVE IMPULSE. THEIR PRIMARY SITE OF ACTION IS THE CELL MEMBRANE. ... BLOCK CONDUCTION BY DECREASING OR PREVENTING THE LARGE TRANSIENT INCREASE IN THE PERMEABILITY OF EXCITABLE MEMBRANES TO NA+ THAT NORMALLY IS PRODUCED BY A SLIGHT DEPOLARIZATION OF THE MEMBRANE. /LOCAL ANESTHETICS/

Hardman, J.G., L.E. Limbird, P.B. Molinoff, R.W. Ruddon, A.G. Goodman (eds.). Goodman and Gilman's The Pharmacological Basis of Therapeutics. 9th ed. New York, NY: McGraw-Hill, 1996., p. 332


AS ANESTHETIC ACTION PROGRESSIVELY DEVELOPS IN A NERVE, THRESHOLD FOR ELECTRICAL EXCITABILITY INCR & SAFETY FACTOR FOR CONDUCTION DECR; WHEN THIS ACTION IS SUFFICIENTLY WELL-DEVELOPED, BLOCK OF CONDUCTION IS PRODUCED. /LOCAL ANESTHETICS/

Goodman, L.S., and A. Gilman. (eds.) The Pharmacological Basis of Therapeutics. 5th ed. New York: Macmillan Publishing Co., Inc., 1975., p. 380


.../2 POSSIBILITIES:/ ACHIEVE BLOCK BY INCR SURFACE PRESSURE OF LIPID LAYER THAT CONSTITUTES NERVE MEMBRANE...CLOSING PORES THROUGH WHICH IONS MOVE. ... /OR:/ AFFECT PERMEABILITY BY INCR DEGREE OF DISORDER OF MEMBRANE. /LOCAL ANESTHETICS/

Goodman, L.S., and A. Gilman. (eds.) The Pharmacological Basis of Therapeutics. 5th ed. New York: Macmillan Publishing Co., Inc., 1975., p. 382