phenazopyridine   Click here for help

GtoPdb Ligand ID: 7616

Synonyms: NC-150 | Pyridium® | W-1655
Approved drug
phenazopyridine is an approved drug
Compound class: Synthetic organic
Comment: This ligand is also represented on ChEMBL by the entry with ID CHEMBL1242.

phenazopyridine is commercially available from our sponsors

2D Structure
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2D Structure

An image of the ligand's 2D structure. For small molecules with SMILES these are drawn using the NCI/CADD Chemical Identifier Resolver. Click on the image to access the chemical structure search tool with the ligand pre-loaded in the structure editor. For other types of ligands, e.g. longer nucleotides and peptides, a manually drawn representation of the molecule may be provided.

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Physico-chemical Properties
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Physico-chemical Properties

Calculated molecular properties are available for small molecules and natural products (not peptides). Properties were generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/). All properties were selected to enable the prediction of the Lipinski Rule-of-Five profile or ‘druglikeness’ for each ligand. For more info on each category see the help pages.

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Hydrogen bond acceptors 5
Hydrogen bond donors 2
Rotatable bonds 2
Topological polar surface area 89.65
Molecular weight 213.1
XLogP 2.71
No. Lipinski's rules broken 0

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
SMILES / InChI / InChIKey
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SMILES / InChI / InChIKey

SMILES (Simplified Molecular Input Line Entry Specification) A specification for unambiguously describing the structure of chemical molecules using short ASCII strings. Canonical SMILES specify a unique representation of the 2D structure without chiral or isotopic specifications. Isomeric SMILES include chiral specification and isotopes.

Standard InChI (IUPAC International Chemical Identifier) and InChIKey InChI is a non-proprietary, standard, textual identifier for chemical substances designed to facilitate linking of information and database searching. An InChIKey is a simplified version of a full InChI, designed for easier web searching.

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)

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Canonical SMILES Nc1ccc(c(n1)N)N=Nc1ccccc1
Isomeric SMILES Nc1ccc(c(n1)N)N=Nc1ccccc1
InChI InChI=1S/C11H11N5/c12-10-7-6-9(11(13)14-10)16-15-8-4-2-1-3-5-8/h1-7H,(H4,12,13,14)
InChI Key QPFYXYFORQJZEC-UHFFFAOYSA-N

Generated using the Chemistry Development Kit (CDK) (Willighagen EL et al. Journal of Cheminformatics vol. 9:33. 2017, doi:10.1186/s13321-017-0220-4; https://cdk.github.io/)
No information available.
Summary of Clinical Use Click here for help
Phenazopyridine acts as a local anesthetic when excreted into the urinary bladder. It has been used to alleviate the symptoms of pain, burning, urgency, frequency, and other discomforts resulting from irritation of the lower urinary tract mucosa caused by infection, trauma, surgery, or other conditions and procedures that irritate the bladder. This drug is availalbe with or without prescription in the US.
Mechanism Of Action and Pharmacodynamic Effects Click here for help
It has been reported that phenazopyridine can directly inhibit sensory Aδ-fibers in normal rat bladder [1], although some caveats to the experimental methodology are discussed in [2]. Aδ-fibers respond to stimuli such as cold and pressure and also act as nociceptors. Inhibition of these fibres could explain the local anaesthetic-like effect of phenazopyridine in the urinary bladder.
External links Click here for help
For extended ADME data see the following:

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