Wednesday, July 8, 2026

Drug profile · INN

phenylbutazone

phenylbutazone (AZOLID) is a cyclooxygenase inhibitor. Route of administration: oral. Current US regulatory status: approved.

FDA: approved
US status approved
Patents linked 20
Pipeline programs 0
News articles 0
Drug details — phenylbutazone
US status
approved
Class
Route
ORAL
Patents
20
Programs
0
Data quality
0.84

Quick answer

phenylbutazone (AZOLID) is a cyclooxygenase inhibitor. Route of administration: oral. Current US regulatory status: approved.

Key facts

INN phenylbutazone
Brand AZOLID
Mechanism Cyclooxygenase inhibitor
Target Cyclooxygenase
Route ORAL
Formulation CAPSULE

Mechanism of action

Cyclooxygenase inhibitor

Primary target: Cyclooxygenase

Approval history

Authority Status Date
FDA approved

Related & competitor drugs

  1. aspirin Cyclooxygenase inhibitor
  2. bromfenac sodium Cyclooxygenase inhibitor
  3. diclofenac potassium Cyclooxygenase inhibitor
  4. diclofenac sodium Cyclooxygenase inhibitor
  5. diflunisal Nervous system (N02)
  6. fenoprofen calcium Cyclooxygenase inhibitor

Related patents

  1. US 11542275

    Substituted imidazolidin-2-one derivatives as PRMT5 inhibitors

    Expires Mon Dec 29 2042 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  2. US 11365205

    Imidazolidin-2-one compounds as PRMT5 modulators

    Expires Mon Jun 16 2042 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  3. US 10709692

    Isoxazolidine derived inhibitors of receptor interacting protein kinase 1 (RIPK1)

    Expires Mon Jul 09 2040 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  4. US 10544113

    Thiazolidinone compounds and use thereof

    Expires Mon Jan 23 2040 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  5. US 9060941

    Pharmaceutical formulation containing a biguanide and a thiazolidinedione derivative

    Expires Mon Jun 18 2035 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  6. US 8637560

    Imidazolidinone compounds, methods to inhibit deubiquitination and methods of treatment

    Expires Mon Jan 23 2034 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  7. US 8404650

    Methods of treating cancer with doxazolidine and prodrugs thereof

    Expires Mon Mar 21 2033 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  8. US 8283370

    Imidazolidinedione derivatives as antimalarial agents, preparation thereof, and methods of use

    Expires Mon Oct 04 2032 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  9. US 8084058

    Pharmaceutical formulation containing a biguanide and a thiazolidinedione derivative

    Expires Mon Dec 22 2031 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  10. US 7998992

    Oxazolidinone derivative having inhibitory activity on 11β-hydroxysteroid dehydrogenase type 1

    Expires Mon Aug 11 2031 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  11. US 7632841

    2-N{5-[[4-[2-(methyl-2-pyridinylamino) ethoxy] phenyl]methyl]-2,4-thiazolidinedione} butanedioic acid, methods of preparation and compositions with rosiglitazone maleate

    Expires Mon Dec 10 2029 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  12. EP 2061775

    SPIRO-OXAZOLIDINON-VERBINDUNGEN UND IHRE VERWENDUNG ALS VERSTÄRKER METABOTROPER GLUTAMATREZEPTOREN

    Expires Tue May 22 2029 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  13. US 7528133

    Use of thiazolidinediones derivatives for preventing uterine contractions in premature labour or lactation

    Expires Mon Apr 30 2029 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  14. US 7435741

    2-N{5-[[4-[2-(methyl-2-pyridinylamino) ethoxy] phenyl]methyl]-2,4-thiazolidinedione} butanedioic acid, methods of preparation and compositions with rosiglitazone maleate

    Expires Mon Oct 09 2028 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  15. US 7300928

    Benzimidazolidinone derivatives as muscarinic agents

    Expires Mon Nov 22 2027 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  16. US 7291611

    Benzimidazolidinone derivatives as muscarinic agents

    Expires Mon Nov 01 2027 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  17. US 7273857

    Benzimidazolidinone derivatives as muscarinic agents

    Expires Mon Sep 20 2027 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  18. US 7087593

    Benzimidazolidinone derivatives as muscarinic agents

    Expires Mon Aug 03 2026 00:00:00 GMT+0000 (Coordinated Universal Time)

    granted
  19. US 6951849

    Benzimidazolidinone derivatives as muscarinic agents

    Expires Mon Sep 29 2025 00:00:00 GMT+0000 (Coordinated Universal Time)

    expired
  20. US 6552058

    Oxazolidinedione derivatives and their use

    Expires Mon Apr 17 2023 00:00:00 GMT+0000 (Coordinated Universal Time)

    expired

Frequently asked questions

What is phenylbutazone?

phenylbutazone (AZOLID) is a cyclooxygenase inhibitor. Route of administration: oral. Current US regulatory status: approved.

What is the brand name for phenylbutazone?

AZOLID is a marketed brand name for phenylbutazone. Check FDA Drugs@FDA for the current US label holder and prescribing information.

What is the US approval status of phenylbutazone?

phenylbutazone has approved status in the United States according to our Drugs@FDA-derived records. Verify on the official FDA label before clinical or commercial decisions.