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Accession NumberDB01609
TypeSmall Molecule
GroupsApproved, Investigational

Deferasirox is an oral iron chelator. Its main use is to reduce chronic iron overload in patients who are receiving long term blood transfusions for conditions such as beta-thalassemia and other chronic anemias. It is the first oral medication approved in the USA for this purpose.

ExjadeNot AvailableNot Available
ICL 670Not AvailableNot Available
ICL 670aNot AvailableNot Available
Prescription Products
NameDosageStrengthRouteLabellerMarketing StartMarketing End
Exjadetablet, for suspension125 mgoralNovartis Pharmaceuticals Corporation2005-11-30Not AvailableUs 0a2ef1ad1c84951dc1392a8bbe1f3cb241c91ed59e44ad8268635315440d978c
Exjadetablet, for suspension250 mgoralNovartis Pharmaceuticals Corporation2005-11-30Not AvailableUs 0a2ef1ad1c84951dc1392a8bbe1f3cb241c91ed59e44ad8268635315440d978c
Exjadetablet, for suspension500 mgoralNovartis Pharmaceuticals Corporation2005-11-30Not AvailableUs 0a2ef1ad1c84951dc1392a8bbe1f3cb241c91ed59e44ad8268635315440d978c
Exjadetablet for suspension125.0 mgoralNovartis Pharmaceuticals Canada IncNot AvailableNot AvailableCanada 5f16b84899037e23705f146ff57e3794121879cb055f0954756d94bc690476b4
Exjadetablet for suspension500.0 mgoralNovartis Pharmaceuticals Canada IncNot AvailableNot AvailableCanada 5f16b84899037e23705f146ff57e3794121879cb055f0954756d94bc690476b4
Generic Prescription ProductsNot Available
Over the Counter ProductsNot Available
International BrandsNot Available
Brand mixturesNot Available
SaltsNot Available
CAS number201530-41-8
WeightAverage: 373.3615
Monoisotopic: 373.106255983
Chemical FormulaC21H15N3O4
4-[bis(2-hydroxyphenyl)-1H-1,2,4-triazol-1-yl]benzoic acid
DescriptionThis compound belongs to the class of organic compounds known as phenyl-1,3,4-triazoles. These are organic compounds containing a 1,3,4-triazole substituted by a phenyl group.
KingdomOrganic compounds
Super ClassOrganoheterocyclic compounds
Sub ClassTriazoles
Direct ParentPhenyl-1,3,4-triazoles
Alternative Parents
  • Phenyl-1,3,4-triazole
  • Phenyl-1,2,4-triazole
  • Aminobenzoic acid or derivatives
  • Aminobenzoic acid
  • Benzoic acid
  • Benzoic acid or derivatives
  • Benzoyl
  • Phenol
  • Benzenoid
  • Monocyclic benzene moiety
  • Heteroaromatic compound
  • Azacycle
  • Monocarboxylic acid or derivatives
  • Carboxylic acid
  • Carboxylic acid derivative
  • Hydrocarbon derivative
  • Organooxygen compound
  • Organonitrogen compound
  • Carbonyl group
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External Descriptors
IndicationFor the treatment of chronic iron overload due to blood transfusions (transfusional hemosiderosis) in patients 2 years of age and older.
PharmacodynamicsDeferasirox is an orally active chelator that is selective for iron (as Fe3+). It is a tridentate ligand that binds iron with high affinity in a 2:1 ratio. Although deferasirox has very low affinity for zinc and copper there are variable decreases in the serum concentration of these trace metals after the administration of deferasirox. The clinical significance of these decreases is uncertain.
Mechanism of actionTwo molecules of deferasirox are capable of binding to 1 atom of iron. Deferasirox works in treating iron toxicity by binding trivalent (ferric) iron (for which it has a strong affinity), forming a stable complex which is eliminated via the kidneys.
AbsorptionThe absolute bioavailability (AUC) of deferasirox tablets for oral suspension is 70% compared to an intravenous dose.
Volume of distribution
  • 14.37 ± 2.69 L
Protein bindingDeferasirox is highly (~99%) protein bound almost exclusively to serum albumin.

Hepatic. CYP450-catalyzed (oxidative) metabolism of deferasirox appears to be minor in humans (about 8%). Glucuronidation is the main metabolic pathway for deferasirox, with subsequent biliary excretion.

Route of eliminationDeferasirox and metabolites are primarily (84% of the dose) excreted in the feces. Renal excretion of deferasirox and metabolites is minimal (8% of the administered dose).
Half lifeThe mean elimination half-life ranged from 8 to 16 hours following oral administration.
ClearanceNot Available
ToxicityNot Available
Affected organisms
  • Humans and other mammals
PathwaysNot Available
SNP Mediated EffectsNot Available
SNP Mediated Adverse Drug ReactionsNot Available
Predicted ADMET features
Human Intestinal Absorption+0.993
Blood Brain Barrier+0.8508
Caco-2 permeable+0.5089
P-glycoprotein substrateNon-substrate0.7808
P-glycoprotein inhibitor INon-inhibitor0.894
P-glycoprotein inhibitor IINon-inhibitor0.8431
Renal organic cation transporterNon-inhibitor0.8708
CYP450 2C9 substrateNon-substrate0.7212
CYP450 2D6 substrateNon-substrate0.8686
CYP450 3A4 substrateNon-substrate0.6466
CYP450 1A2 substrateNon-inhibitor0.5802
CYP450 2C9 substrateNon-inhibitor0.7105
CYP450 2D6 substrateNon-inhibitor0.8221
CYP450 2C19 substrateNon-inhibitor0.5918
CYP450 3A4 substrateNon-inhibitor0.8179
CYP450 inhibitory promiscuityLow CYP Inhibitory Promiscuity0.5717
Ames testNon AMES toxic0.6607
BiodegradationNot ready biodegradable0.9524
Rat acute toxicity2.1119 LD50, mol/kg Not applicable
hERG inhibition (predictor I)Weak inhibitor0.9684
hERG inhibition (predictor II)Non-inhibitor0.9072
ManufacturersNot Available
Dosage forms
Tablet for suspensionoral125.0 mg
Tablet for suspensionoral500.0 mg
Tablet, for suspensionoral125 mg
Tablet, for suspensionoral250 mg
Tablet, for suspensionoral500 mg
Unit descriptionCostUnit
Exjade 500 mg tablet78.61USD tablet
Exjade 250 mg tablet39.3USD tablet
Exjade 125 mg tablet19.65USD tablet
DrugBank does not sell nor buy drugs. Pricing information is supplied for informational purposes only.
CountryPatent NumberApprovedExpires (estimated)
United States64655041999-04-052019-04-05
United States65967501997-06-242017-06-24
Experimental Properties
melting point116-117 °CNot Available
water solubility0.038 mg/mL at 37 °CYALKOWSKY,SH & DANNENFELSER,RM (1992)
logP3.52HANSCH,C ET AL. (1995)
Predicted Properties
Water Solubility0.0343 mg/mLALOGPS
pKa (Strongest Acidic)4.55ChemAxon
pKa (Strongest Basic)0.19ChemAxon
Physiological Charge-1ChemAxon
Hydrogen Acceptor Count6ChemAxon
Hydrogen Donor Count3ChemAxon
Polar Surface Area108.47 Å2ChemAxon
Rotatable Bond Count4ChemAxon
Refractivity125.32 m3·mol-1ChemAxon
Polarizability38.52 Å3ChemAxon
Number of Rings4ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Mass Spec (NIST)Not Available
SpectraNot Available
Synthesis Reference

Rajendra Suryabhan Patil, Kishore Charugundla, Praveen Kumar Neela, Nitin Sharadchandra Pradhan, Jon Valgeirsson, “SUBSTANTIALLY PURE DEFERASIROX AND PROCESSES FOR THE PREPARATION THEREOF.” U.S. Patent US20110171138, issued July 14, 2011.

General ReferenceNot Available
External Links
ATC CodesV03AC03
AHFS CodesNot Available
PDB EntriesNot Available
FDA labelNot Available
MSDSNot Available
Drug Interactions
AluminiumPossible physicochemical interaction
BivalirudinAnticoagulants increase the risk for gastrointestinal ulceration/irritation and/or GI bleeding. If these two agents must be used, patients need to be closely monitored for signs and symptoms of GI toxicity.
EtravirineEtravirine, when administered concomitantly with deferasirox, may experience a decrease in serum concentration. It is recommended to monitor therapy.
TofacitinibTofacitinib (and other CYP3A4 substrates), when used in combination with deferasirox, may experience a decrease in concentration. It is recommended to monitor therapy.
Food Interactions
  • Dispersion in carbonated drinks or milk is not recommended due to foaming and slow dispersion, respectively.
  • Food causes inconsistent increases in the bioavailability of this product.
  • Tablets should be completely dispersed in water, orange juice or apple juice and the resulting suspension should be ingested immediately (after swallowing the suspension, any residue should be resuspended in a small volume of liquid and swallowed).
  • Tablets should be taken on an empty stomach at least 30 minutes before a meal, preferably at the same time everyday.


1. Iron

Kind: small molecule

Organism: Human

Pharmacological action: yes

Actions: chelator


Name UniProt ID Details


  1. Wang T, Gao C, Chen BA: [Deferasirox—a new oral iron chelator—review]. Zhongguo Shi Yan Xue Ye Xue Za Zhi. 2010 Oct;18(5):1359-64. Pubmed
  2. Ibrahim AS, Spellberg B, Edwards J Jr: Iron acquisition: a novel perspective on mucormycosis pathogenesis and treatment. Curr Opin Infect Dis. 2008 Dec;21(6):620-5. Pubmed
  3. Devanur LD, Evans RW, Evans PJ, Hider RC: Chelator-facilitated removal of iron from transferrin: relevance to combined chelation therapy. Biochem J. 2008 Jan 15;409(2):439-47. Pubmed
  4. Lebitasy M, Ampe E, Hecq JD, Karmani L, Nick H, Galanti L: Ability of deferasirox to bind iron during measurement of iron. Clin Chem Lab Med. 2010 Mar;48(3):427-9. Pubmed
  5. Yang LP, Keam SJ, Keating GM: Deferasirox : a review of its use in the management of transfusional chronic iron overload. Drugs. 2007;67(15):2211-30. Pubmed
  6. Choudhry VP, Naithani R: Current status of iron overload and chelation with deferasirox. Indian J Pediatr. 2007 Aug;74(8):759-64. Pubmed


1. Cytochrome P450 3A4

Kind: protein

Organism: Human

Pharmacological action: unknown

Actions: inducer


Name UniProt ID Details
Cytochrome P450 3A4 P08684 Details


  1. Skerjanec A, Wang J, Maren K, Rojkjaer L: Investigation of the pharmacokinetic interactions of deferasirox, a once-daily oral iron chelator, with midazolam, rifampin, and repaglinide in healthy volunteers. J Clin Pharmacol. 2010 Feb;50(2):205-13. Epub 2009 Nov 25. Pubmed

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Drug created on August 29, 2007 13:21 / Updated on September 16, 2013 17:15