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2D Structure
Also known as: Ioxaglate, 59017-64-0, Acido ioxaglico, Acide ioxaglique, Acidum ioxaglicum, Hexabrix 320
Molecular Formula
C24H21I6N5O8
Molecular Weight
1268.9  g/mol
InChI Key
TYYBFXNZMFNZJT-UHFFFAOYSA-N
FDA UNII
Z40X7EI2AF

A low-osmolar, ionic contrast medium used in various radiographic procedures.
Ioxaglic acid is a Radiographic Contrast Agent. The mechanism of action of ioxaglic acid is as a X-Ray Contrast Activity.
1 2D Structure

2D Structure

2 Identification
2.1 Computed Descriptors
2.1.1 IUPAC Name
3-[[2-[[3-[acetyl(methyl)amino]-2,4,6-triiodo-5-(methylcarbamoyl)benzoyl]amino]acetyl]amino]-5-(2-hydroxyethylcarbamoyl)-2,4,6-triiodobenzoic acid
2.1.2 InChI
InChI=1S/C24H21I6N5O8/c1-7(37)35(3)20-17(29)10(21(39)31-2)13(25)11(18(20)30)23(41)33-6-8(38)34-19-15(27)9(22(40)32-4-5-36)14(26)12(16(19)28)24(42)43/h36H,4-6H2,1-3H3,(H,31,39)(H,32,40)(H,33,41)(H,34,38)(H,42,43)
2.1.3 InChI Key
TYYBFXNZMFNZJT-UHFFFAOYSA-N
2.1.4 Canonical SMILES
CC(=O)N(C)C1=C(C(=C(C(=C1I)C(=O)NCC(=O)NC2=C(C(=C(C(=C2I)C(=O)O)I)C(=O)NCCO)I)I)C(=O)NC)I
2.2 Other Identifiers
2.2.1 UNII
Z40X7EI2AF
2.3 Synonyms
2.3.1 MeSH Synonyms

1. Hexabrix

2. Ioxaglate

3. Ioxaglate Meglumine

4. Ioxaglate Sodium

5. Ioxaglate, Methylglucamine

6. Ioxaglic Acid Monosodium Salt

7. Ioxaglic Acid, Calcium Salt (2:1)

8. Meglumine, Ioxaglate

9. Methylglucamine Ioxaglate

10. P-286 (contrast Media)

11. P286 (contrast Media)

2.3.2 Depositor-Supplied Synonyms

1. Ioxaglate

2. 59017-64-0

3. Acido Ioxaglico

4. Acide Ioxaglique

5. Acidum Ioxaglicum

6. Hexabrix 320

7. Ioxaglic Acid (100 Mg)

8. 3-[[2-[[3-[acetyl(methyl)amino]-2,4,6-triiodo-5-(methylcarbamoyl)benzoyl]amino]acetyl]amino]-5-(2-hydroxyethylcarbamoyl)-2,4,6-triiodobenzoic Acid

9. N-(2-hydroxyethyl)-2,4,6-triiodo-5-(2-(2,4,6-triiodo-3-(n-methylacetamido)-5-(methylcarbamoyl)benzamido)acetamido)isophthalamic Acid

10. Z40x7ei2af

11. Hexabrix 160; P 286

12. Chebi:31718

13. 3-[(n-{3-[acetyl(methyl)amino]-2,4,6-triiodo-5-(methylcarbamoyl)benzoyl}glycyl)amino]-5-[(2-hydroxyethyl)carbamoyl]-2,4,6-triiodobenzoic Acid

14. Hexabrix 160

15. Ncgc00016886-01

16. Cas-59017-64-0

17. P 286 (contrast Medium)

18. Acide Ioxaglique [inn-french]

19. Acido Ioxaglico [inn-spanish]

20. Acidum Ioxaglicum [inn-latin]

21. Einecs 261-560-1

22. Unii-z40x7ei2af

23. Ioxaglic-acid

24. Hsdb 8077

25. Ioxaglic Acid [usan:usp:inn:ban:jan]

26. Hexabrix 320 (tn)

27. Prestwick0_001062

28. Prestwick1_001062

29. Prestwick2_001062

30. Prestwick3_001062

31. Ioxaglate [vandf]

32. Dsstox_cid_3166

33. Ioxaglic Acid [mi]

34. Dsstox_rid_76899

35. Ioxaglic Acid [inn]

36. Ioxaglic Acid [jan]

37. Dsstox_gsid_23166

38. Schembl38073

39. Bspbio_001044

40. Ioxaglic Acid [usan]

41. Benzoic Acid, 3-((((3-(acetylmethylamino)-2,4,6-triiodo-5-((methylamino)carbonyl)benzoyl)amino)acetyl)amino)-5-(((2-hydroxyethyl)amino)carbonyl)-2,4,6-triiodo-

42. Mls002154135

43. Spbio_002962

44. Ioxaglic Acid [mart.]

45. Bpbio1_001150

46. Ioxaglic Acid (jan/usp/inn)

47. Ioxaglic Acid [usp-rs]

48. Ioxaglic Acid [who-dd]

49. Chembl1201291

50. Dtxsid5023166

51. Hms1571e06

52. Hms2098e06

53. Hms2234i18

54. Hms3371k01

55. Hms3715e06

56. Tox21_110664

57. Ioxaglic Acid [ep Monograph]

58. Ioxaglic Acid [usp Monograph]

59. Ccg-221062

60. Db09313

61. Ncgc00016886-02

62. Ncgc00016886-04

63. Smr001233442

64. Hy-106586

65. Ab00514026

66. Cs-0026109

67. Ft-0627285

68. D01761

69. Sr-01000841818

70. Q6064817

71. Sr-01000841818-2

72. W-111165

73. Brd-k79124250-001-03-0

74. [(methylamino)carbonyl]benzoyl]amino]acetyl]amino]-5-[[(2-hydroxyethyl)amino]carbonyl]-2,4,6-triiodo-

75. 3-{[n-({3-[acetyl(methyl)amino]-2,4,6-triiodo-5-[(methylamino)carbonyl]phenyl}carbonyl)glycyl]amino}-5-{[(2-hydroxyethyl)amino]carbonyl}-2,4,6-triiodobenzoic Acid

76. Benzoic Acid, 3-((((3-(acetylmethylamino)-2,4,6-triiodo-5-9((methylamino)carbonyl)benzoyl)amino)acetyl)amino)-5-(((2-hydroxyethyl)amino)carbonyl)-2,4,6-triiodo-

2.4 Create Date
2005-03-25
3 Chemical and Physical Properties
Molecular Weight 1268.9 g/mol
Molecular Formula C24H21I6N5O8
XLogP32.8
Hydrogen Bond Donor Count6
Hydrogen Bond Acceptor Count8
Rotatable Bond Count10
Exact Mass1268.5658 g/mol
Monoisotopic Mass1268.5658 g/mol
Topological Polar Surface Area194 Ų
Heavy Atom Count43
Formal Charge0
Complexity1090
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 Therapeutic Uses

Intravascular injection of a radiopaque diagnostic agent opacifies those vessels in the path of the flow of the contrast medium, permitting radiographic visualization of the internal structures of the human body until significant hemodilution occurs.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


Contrast Media

National Library of Medicine's Medical Subject Headings online file (MeSH, 2009)


THERAPEUTIC CATEGORY: Diagnostic aid (radiopaque medium)

O'Neil, M.J. (ed.). The Merck Index - An Encyclopedia of Chemicals, Drugs, and Biologicals. Whitehouse Station, NJ: Merck and Co., Inc., 2006., p. 881


HEXABRIX is indicated for use in pediatric angiocardiography, selective coronary arteriography with or without left ventriculography, peripheral arteriography, aortography, selective visceral arteriography, cerebral angiography, intra-arterial digital subtraction angiography, intravenous digital subtraction angiography, peripheral venography (phlebography), excretory urography, contrast enhancement of computed tomographic head imaging and body imaging, arthrography and hysterosalpingography. /Included in US product label/

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


For more Therapeutic Uses (Complete) data for Ioxaglate (7 total), please visit the HSDB record page.


4.2 Drug Warning

/BOXED WARNING/ SEVERE ADVERSE EVENTS - INADVERTENT INTRATHECAL ADMINISTRATION: Serious adverse reactions have been reported due to the inadvertent intrathecal administration of iodinated contrast media that are not indicated for intrathecal use. These serious adverse reactions include: death, convulsions, cerebral hemorrhage, coma, paralysis, arachnoiditis, acute renal failure, cardiac arrest, seizures, rhabdomyolysis, hyperthermia, and brain edema. Special attention must be given to insure that this drug product is not administered intrathecally.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


Ionic iodinated contrast media inhibit blood coagulation, in vitro, more than nonionic contrast media. Nonetheless, it is prudent to avoid prolonged contact of blood with syringes containing ionic contrast media. Serious, rarely fatal, thromboembolic events causing myocardial infarction and stroke have been reported during angiographic procedures with both ionic and nonionic contrast media. Therefore, meticulous intravascular administration technique is necessary, particularly during angiographic procedures, to minimize thromboembolic events. Numerous factors, including length of procedure, catheter and syringe material, underlying disease state and concomitant medications may contribute to the development of thromboembolic events. For these reasons, meticulous angiographic techniques are recommended including close attention to guidewire and catheter manipulation, use of manifold systems and/ or three-way stopcocks, frequent catheter flushing with heparinized saline solutions and minimizing the length of the procedure. The use of plastic syringes in place of glass syringes has been reported to decrease but not eliminate the likelihood of in vitro clotting. Serious or fatal reactions have been associated with the administration of iodine containing radiopaque media. It is of utmost importance to be completely prepared to treat any contrast medium reaction.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


As with any contrast medium, serious neurologic sequelae, including permanent paralysis, can occur following cerebral arteriography, selective spinal arteriography and arteriography of vessels supplying the spinal cord. The injection of a contrast medium should never be made following the administration of vasopressors since they strongly potentiate neurologic effects. In patients with subarachnoid hemorrhage, a rare association between contrast administration and clinical deterioration, including convulsions and death, has been reported. Therefore, administration of intravascular iodinated contrast media in these patients should be undertaken with caution.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


A definite risk exists in the use of intravascular contrast agents in patients who are known to have multiple myeloma. In such instances anuria has developed resulting in progressive uremia, renal failure and eventually death. Although neither the contrast agent nor dehydration has separately proved to be the cause of anuria in myeloma, it has been speculated that the combination of both may be causative factors. The risk in myelomatous patients is not a contraindication to the procedure; however, partial dehydration in the preparation of these patients for the examination is not recommended since this may predispose to precipitation of myeloma protein in the renal tubules. No form of therapy, including dialysis, has been successful in reversing the effect. Myeloma, which occurs most commonly in persons over 40, should be considered before instituting intravascular administration of contrast agents.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


For more Drug Warnings (Complete) data for Ioxaglate (29 total), please visit the HSDB record page.


4.3 Drug Indication

This medicinal product is for diagnostic use only in adults and children as a low-osmolality medium,.


5 Pharmacology and Biochemistry
5.1 Pharmacology

This drug allows for the visualization of important organs and structures in the body. It binds to tissues, allowing the blockage of X-rays and diagnostic visualization in various soft tissues and body cavities. The joint spaces in addition to the uterus and fallopian tubes may be visualized by the direct injection of the contrast medium into the region to be studied.


5.2 MeSH Pharmacological Classification

Contrast Media

Substances used to allow enhanced visualization of tissues. (See all compounds classified as Contrast Media.)


5.3 FDA Pharmacological Classification
5.3.1 Active Moiety
IOXAGLIC ACID
5.3.2 FDA UNII
Z40X7EI2AF
5.3.3 Pharmacological Classes
Mechanisms of Action [MoA] - X-Ray Contrast Activity
5.4 ATC Code

V - Various

V08 - Contrast media

V08A - X-ray contrast media, iodinated

V08AB - Watersoluble, nephrotropic, low osmolar x-ray contrast media

V08AB03 - Ioxaglic acid


5.5 Absorption, Distribution and Excretion

Absorption

Following the intravascular route of injection, Ioxaglic acid is rapidly transported through the circulatory system to the kidneys. The pharmacokinetics of radiopaque contrast media given by the IV route are described by a two-compartment model with a rapid alpha phase for drug distribution and a slow beta phase for the elimination of the drug. Following the intravenous administration of 50 mL of ioxaglic acid in 10 healthy volunteers, the mean peak plasma concentration occurred at two (1-3) minutes, reaching a concentration of 2.1 (1.8-2.8) mg/mL. Approximately 50 percent of the intravenously administered dose was recovered in the urine at two hours, and 90% percent was recovered at the 24 hour time point.


Route of Elimination

Excreted unchanged in the urine The liver and small intestine provide the major alternate route of excretion. In patients with severe renal impairment, the excretion of this contrast medium through the gallbladder and into the small intestine sharply increases.


Volume of Distribution

Ioxaglate salts cross the placental barrier in humans and are excreted unchanged in human milk.


Clearance

245 ml/kg


Following intravascular injection, HEXABRIX is rapidly transported through the circulatory system to the kidneys and is excreted unchanged in the urine. The pharmacokinetics of intravascularly administered radiopaque contrast media are usually best described by a two compartment model with a rapid alpha phase for drug distribution and a slower beta phase for drug elimination.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


Following the intravenous administration of 50 mL of HEXABRIX in 10 normal volunteers, the mean peak plasma concentration occurred at two (1-3) minutes, reaching a concentration of 2.1 (1.8-2.8) mg/mL. Approximately 50 (42-67) percent of the intravenously administered dose was recovered in the urine at two hours, and 90 (68-105) percent was recovered at 24 hours.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


Following intravenous injection, HEXABRIX is rapidly excreted by the kidneys. HEXABRIX may be visualized in the renal parenchyma one minute following bolus injection. Maximum radiographic density in the calyces and pelves occurs in most instances within 7 to 12 minutes after injection. In patients with severe renal impairment, contrast visualization may be substantially delayed.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


In brain scanning, contrast media do not accumulate in normal brain tissue due to the blood brain barrier (BBB). The increase in x-ray attenuation usually seen in normal tissue following contrast medium injection is due to the presence of the contrast medium in the blood pool. Disruption in the BBB, such as occurs in malignant tumors of the brain, allows accumulation of contrast medium within the interstitial tumor tissue; adjacent normal brain tissue does not contain the contrast medium.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


For more Absorption, Distribution and Excretion (Complete) data for Ioxaglate (8 total), please visit the HSDB record page.


5.6 Metabolism/Metabolites

Excreted unchanged.


5.7 Biological Half-Life

Hexabrix 320 is rapidly eliminated by the kidneys with a half-life of about 90 minutes


In 10 patients with normal renal function, the alpha and beta half-lives of HEXABRIX were 12 (4-17) and 92 (61-140) minutes, respectively.

US Natl Inst Health; DailyMed. Current Medication Information for HEXABRIX (ioxaglate meglumine and ioxaglate sodium) injection (December 2010). Available from, as of June 25, 2012: https://dailymed.nlm.nih.gov/dailymed/lookup.cfm?setid=d9a16f54-c83a-4527-b6fe-11c71a875a41


5.8 Mechanism of Action

Ioxaglic acid is an iodine-containing, low osmolality contrast agent. Ioxaglate is a molecule that consists of six iodine atoms and achieves water solubility by ionization; thus, it is a 3.0 ratio ionic agent. By far the most successful and widely used contrast agents in use today are the iodinated contrast media, which were introduced into clinical practice in the 1950s. Approximately 75 million doses of iodinated contrast agents are administered worldwide each year. The iodinated contrast agents fall into 4 groups. Each group has unique chemical, physical, and biologic properties. These various contrast agents are required to meet the demands of a broad variety of imaging modalities. All agents share a similar function groupa tri-iodinated benzene ring. Iodine plays an imperative role in the attenuation of x-ray signal. The atomic radius of a covalently bonded iodine atom is about 133 picometers, falling within the same range of the wavelengths of x-rays: 10 to 10,000 picometers. Therefore, x-rays are easily attenuated by the iodine atoms. In addition, iodine atoms covalently bonded to a benzene ring have 2 main advantages: (1) 3 large atoms located in such close proximity increase the effective molecular size, attenuating longer-wavelength x-rays, and (2) covalent bonding to a stable organic functional group (for example, benzene) decrease the risk of toxic adverse effects from free iodide molecules. Ionization is an important characteristic to note in contrast media preparations. Compounds are classified as either ionic or nonionic. The ionic compounds dissociate in aqueous solution and therefore have a higher osmolality. The anion is the radiopaque portion of the molecule, however, both the anion and cation are osmotically active. Compared with nonionic media such as ioxaglic acid, ionic contrast media have more adverse hemodynamic effects, especially in patients with heart disease. The nonionic media are water soluble but do not dissociate in solution. Nonionic agents possess lower osmolality because there are fewer particles in solution. The nonionic contrast agents are more hydrophilic than ionic agents, resulting in lower osmolality, reduced binding to plasma proteins, decreased tissue binding, and a decreased tendency to cross cell membranes. The low-osmolality of ioxaglic acid reduces the risk of adverse events. The occurrence of adverse reactions is more common after the use of high-osmolarity agents: about 15% with a high-osmolarity agent versus 3% with a low-osmolarity agent. The use of high-osmolarity agents has decreased significantly in recent years. Most adverse effects and adverse reactions to this group of drugs are multifactorial and are likely due to a combination of direct cellular toxicity, the ionic state (for example, ionic vs nonionic), or the osmolarity of the injected contrast drug.