Catalog No.S4049

For research use only.

Valdecoxib is a potent and selective inhibitor of COX-2 with IC50 of 5 nM.

Valdecoxib Chemical Structure

CAS No. 181695-72-7

Selleck's Valdecoxib has been cited by 3 Publications

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Biological Activity

Description Valdecoxib is a potent and selective inhibitor of COX-2 with IC50 of 5 nM.
Features Valdecoxib is more potent in inhibiting COX-2 than COX-1.
COX-2 [1]
5 nM
In vitro

Valdecoxib inhibits LPS-induced PGE2 production in plasma with IC50 of 0.89 μM for assessment of the extent of COX-2 inhibition.  Valdecoxib inhibits TxB2 production in plasma with IC50 of 25.4 μM for assessment of the extent of COX-1 inhibition. [1] Valdecoxib binds to COX-2 with Ka of 1.1×105 M/s. The overall saturation binding affinity for COX-2 of Valdecoxib is 2.6 nM. Valdecoxib shows similar activity in the human whole-blood COX assay (COX-2 IC50 = 0.24 μM; COX-1 IC50 = 21.9 μM). [2] The affinity of [3H]Valdecoxib for COX-2 with KD of 3.2 nM. The binding of Valdecoxib to COX-2 seems to be both rapid and slowly reversible with association rates of 4.5 × 106/M/min and dissociation rates of 7.0 × 10-3/min (t1/2 of 98 min). [3] The percent of dissolved Valdecoxib at 15 min (DP15) is 10.5% for Valdecoxib and 50%, 91% and 93% for its hydrophilic derivatives (VALD-βCd, VALD-HPβCd and VALD-SBE7βCd complexes), respectively. [4]

In vivo Valdecoxib administrated orally inhibits rat carrageenan foot pad edema with ED50 of 10.2 mg/kg. Valdecoxib administrated orally shows chronic antiinflammatory activity with ED50 of 0.032 mg/kg/day in rat adjuvant arthritis model. Valdecoxib administrated orally shows blockade of prostaglandin production at the inflammatory site with ED50 of 0.02 mg/kg in the rat carrageenan air pouch model. [1] Valdecoxib demonstrates marked potency in acute and chronic models of inflammation (air pouch ED50 = 0.06 mg/kg; paw edema ED50 = 5.9 mg/kg; adjuvant arthritis ED50 = 0.03 mg/kg) in rats. [2] Valdecoxib alone shows slow in vivo absorption giving maximum % inhibition of edema (16%) after a period of 3 hour. In contrast, VALD-βCd and VALD-SBE7βCd complexes shows high absorption rate in vivo achieving more than 50% inhibition of edema in the 1 hour and maximum percentage of inhibition of edema (66%) after a period of 3 hours. [4] Valdecoxib (5 mg/kg, po) results in AUC in plasma of 3.58 μg*h/mL and 2.08 μg*h/mL in males and female mice, respectively. Valdecoxib (5 mg/kg, po) results in AUC red blood cells of 12.1 μg*h/mL and 6.42 μg*h/mL in males and female mice, respectively. [5]

Protocol (from reference)

Animal Research:[1]
  • Animal Models: Male Sprague-Dawley rats
  • Dosages: 10.2 mg/kg
  • Administration: Orally

Solubility (25°C)

In vitro

In vivo

Add solvents to the product individually and in order
(Data is from Selleck tests instead of citations):
0.5% methylcellulose+0.2% Tween 80
For best results, use promptly after mixing.

19 mg/mL

Chemical Information

Molecular Weight 314.36


CAS No. 181695-72-7
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles CC1=C(C(=NO1)C2=CC=CC=C2)C3=CC=C(C=C3)S(=O)(=O)N

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Clinical Trial Information

NCT Number Recruitment Interventions Conditions Sponsor/Collaborators Start Date Phases
NCT00122096 Completed Drug: valdecoxib Neurosurgery|Pain University of Washington|Pfizer November 2002 Phase 4

(data from, updated on 2022-08-01)

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