Sold as Butazolidin. Every FDA application for this active ingredient: 1 branded and 10 generic.
As of Nov 15, 2026, FDA lists 11 applications for Phenylbutazone (sold as Butazolidin), first approved Jun 25, 1997, with 0 new uses approved and 0 published complete response letters.
| Oct 29, 1979 | PhenylbutazoneANDA 86151 | Watson Labs | 4 | Discontinued |
| Jan 10, 1980 | PhenylbutazoneANDA 84339 | Fosun Pharma | 11 | Discontinued |
| Oct 13, 1981 | AzolidANDA 87260 | Sanofi Aventis US | 0 | Discontinued |
| Apr 21, 1982 | PhenylbutazoneANDA 87674 | Watson Labs | 0 | Discontinued |
| Jun 16, 1982 | PhenylbutazoneANDA 87774 | Chartwell Rx | 2 | Discontinued |
| Dec 17, 1982 | PhenylbutazoneANDA 87756 | Watson Labs | 4 | Discontinued |
| Jun 24, 1983 | PhenylbutazoneANDA 88218 | Ivax Pharms | 0 | Discontinued |
| Dec 4, 1985 | PhenylbutazoneANDA 88863 | Sun Pharm Industries | 12 | Discontinued |
| Dec 4, 1985 | PhenylbutazoneANDA 88994 | Sun Pharm Industries | 11 | Discontinued |
| Jun 25, 1997 | ButazolidinNDA 8319 · New molecular entity, new combination | Novartis | 18 | Discontinued |
| — | AzolidANDA 87091 | Sanofi Aventis US | 0 | Discontinued |
Applications, approvals and products come from FDA's Drugs@FDA data files, refreshed weekly, grouped by active ingredient as FDA spells it. Complete response letters are FDA's published letters. Medicare spending is CMS's Part D and Part B dashboard, matched to this ingredient by generic name; shortages are FDA's shortage list, matched by application number; clinical trials are ClinicalTrials.gov studies naming the ingredient as an intervention, refreshed daily; safety programs are FDA's REMS list, matched by application number or, for shared programs, by ingredient. Drugs@FDA