Chemicals and Drugs

Phenazopyridine

A local anesthetic that has been used in urinary tract disorders. Its use is limited by problems with toxicity (primarily blood disorders) and potential carcinogenicity.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A local anesthetic that has been used in urinary tract disorders. Its use is limited by problems with toxicity (primarily blood disorders) and potential carcinogenicity.

Chemical Identity

Chemical Information

Molecular Formula
C11H11N5
Molecular Weight
213.24 g/mol
CAS Registry No.
94-78-0
IUPAC Name
3-phenyldiazenylpyridine-2,6-diamine
InChIKey
QPFYXYFORQJZEC-UHFFFAOYSA-N
SMILES
C1=CC=C(C=C1)N=NC2=C(N=C(C=C2)N)N
MeSH Unique ID
D010621
Source
PubChem CID 4756

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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MeSH Record

Synonyms

25 entry terms
  • Azo-Dine
  • Azo-Gesic
  • Azo-Natural
  • Azo-Standard
  • Baridium
  • Geridium
  • Phenazo
  • Phenazopyridine Hydrochloride
  • Prodium
  • Pyridiate
  • Pyridium
  • Re-Azo
  • UTI Relief
  • Urogesic
  • Azo Dine
  • Azo Gesic
  • Azo Natural
  • Azo Standard
  • AzoDine
  • AzoGesic
  • AzoNatural
  • AzoStandard
  • Hydrochloride, Phenazopyridine
  • Re Azo
  • ReAzo

MeSH Record

Aspects Covered

25 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, analysis, antagonists & inhibitors, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, economics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

History Note

91(65); was see under AMINOPYRIDINES 1979-90; was see under PYRIDINES 1975-78

MeSH Hierarchy

Tree Number

  1. D03w.383.725w.050.610w

AMA Style

References

  1. National Library of Medicine. Phenazopyridine. Medical Subject Headings (MeSH). 2026. Unique ID D010621. http://id.nlm.nih.gov/mesh/2026/D010621
  2. Phenazopyridine. In: Wikipedia. https://en.wikipedia.org/wiki/Phenazopyridine
  3. Phenazopyridine. In: Wikidata. https://www.wikidata.org/wiki/Q3114549
  4. Phenazopyridine. In: PubChem Compound. CID 4756. https://pubchem.ncbi.nlm.nih.gov/compound/4756