Reported Reactions

Drugs › Xanthine oxidase inhibitor

Brand name · Febuxostat

Uloric: adverse event reports filed with FDA

3,100 reports list it as a suspect or interacting product, 2009–2026. Class: Xanthine oxidase inhibitor.

3,100
reports as suspect product
0% of all reports · about 180 a year
13
reports, 12 months to June 2026
25 in the 12 months before
29.4%
marked serious by the reporter
87.7% across the class
3.7%
record death among outcomes, as reported
115 reports · not verified by FDA

Between April 2009 and February 2026, 3,100 adverse event reports received by FDA list the brand name Uloric (febuxostat) as a suspect or interacting product. Reports that mention it only as a concomitant medication (3,766) are left out of every figure here.

In the 12 months to June 2026, 13 reports listed it, down 48% from 25 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Over its reporting history that is about 180 reports a year and 0% of the 20,646,523 reports in the database, and 11.2% of the reports for the xanthine oxidase inhibitor class. How many people take it is not in the data, so a count is not a rate of occurrence.

The MedDRA terms listed most often are gout (14.5%), rash (9.1%) and drug ineffective (4.6%). A report can list several reactions, so shares add to more than 100%; 363 different terms appear across these reports. Gout is recorded in 14.5% of these reports, a larger share than in the median xanthine oxidase inhibitor drug (2.7%).

29.4% of the reports are marked serious by the reporter (87.7% across the class); 3.7% record death among the outcomes and 12% record hospitalisation, as reported. 40.4% of the reports came from physicians, and the largest patient age group is 45 to 64 (18%). FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."

Reports by month, five years

059Jul 2021: 2Aug 2021: 1Sep 2021: 1Oct 2021: 1Nov 2021: 1Dec 2021: 12022Jan 2022: 1Feb 2022: 3Mar 2022: 3Apr 2022: 0May 2022: 1Jun 2022: 0Jul 2022: 0Aug 2022: 0Sep 2022: 1Oct 2022: 0Nov 2022: 2Dec 2022: 72023Jan 2023: 0Feb 2023: 0Mar 2023: 1Apr 2023: 0May 2023: 1Jun 2023: 3Jul 2023: 0Aug 2023: 0Sep 2023: 1Oct 2023: 0Nov 2023: 0Dec 2023: 02024Jan 2024: 0Feb 2024: 0Mar 2024: 0Apr 2024: 1May 2024: 1Jun 2024: 1Jul 2024: 0Aug 2024: 0Sep 2024: 3Oct 2024: 9Nov 2024: 1Dec 2024: 12025Jan 2025: 2Feb 2025: 1Mar 2025: 6Apr 2025: 0May 2025: 2Jun 2025: 0Jul 2025: 1Aug 2025: 4Sep 2025: 3Oct 2025: 0Nov 2025: 0Dec 2025: 32026Jan 2026: 0Feb 2026: 2Mar 2026: 0Apr 2026: 0May 2026: 0Jun 2026: 0

Reports by the month FDA received them. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.

By year received

09651,9292009: 6220092010: 742011: 7520112012: 632013: 4820132014: 332015: 1,92920152016: 1742017: 12820172018: 832019: 10520192020: 1642021: 9720212022: 182023: 620232024: 172025: 2220252026: 2

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Uloric reports recording the termmedian drug in xanthine oxidase inhibitor

  1. Goutgout14.5%451
  2. Rashskin rash9.1%282
  3. Drug ineffectivethe medicine did not work as expected4.6%143
  4. Nauseafeeling sick4.6%142
  5. Diarrhoealoose or frequent stools3.5%108
  6. Condition aggravatedthe condition being treated got worse3.3%102
  7. Arthralgiajoint pain3.3%101
  8. Myocardial infarctionheart attack2.8%88
  9. Dizzinesslight-headedness or unsteadiness2.6%80
  10. Blood creatinine increasedraised creatinine, a kidney test2.5%77
  11. Pruritusitching2.2%68
  12. Hepatic enzyme increasedraised liver enzymes2.1%65
  13. Headachehead pain1.9%60
  14. Pain in extremitypain in an arm or leg1.9%60
  15. Dyspnoeashortness of breath1.9%59
  16. Fatiguetiredness1.9%58
  17. Oedema peripheralswelling of the legs, ankles or hands1.9%58
  18. Blood uric acid increasedraised uric acid1.8%56
  19. Chest painchest pain1.5%47
  20. Vomitingbeing sick1.4%44
  21. No adverse eventno adverse event was reported1.4%43
  22. Myalgiamuscle pain1.3%40
  23. Blood pressure increaseda raised blood pressure reading1.3%39
  24. Renal failurekidney failure1.3%39
  25. Painpain, site not specified1.2%38
  26. Cardiac failure congestivecongestive heart failure1.2%36
  27. Abdominal discomfortstomach discomfort1.1%33

Top 30 of 363 MedDRA preferred terms recorded across these reports, with a plain-language gloss where one is available. One report can record several terms. The hollow bar is the median share across the 3 drugs in the xanthine oxidase inhibitor class; it describes the reports, not the patients. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Outcomes recorded

Death3.7%115
Life-threatening1.7%53
Hospitalisation (initial or prolonged)12%373
Disability0.8%26
Congenital anomaly0%0
Other serious20.4%631
Not serious70.6%2,189

Outcome flags as the reporter set them; a report can carry several, and "other serious" is FDA's own category for serious reports outside the named outcomes. Grey bar: all 27,590 reports in the class. FDA has not verified any outcome and states that the reports "cannot be used to estimate the incidence of these events."

Patients and reporters

Patient age

Under 20%1
2 to 110.1%3
12 to 170%0
18 to 445.1%158
45 to 6418%559
65 to 7411.3%350
75 and over14.1%436
Age not given51.4%1,593

Patient sex

Female25.8%800
Male53.6%1,662
Not given20.6%638

Who reported

Physician40.4%1,253
Pharmacist2%63
Other health professional16.9%524
Lawyer2%62
Consumer or non-health professional29.9%927
Not given8.7%271

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 94.3% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Gout1,75856.7%
Hyperuricaemia1595.1%
Blood uric acid increased1274.1%
Gouty tophus581.9%
Gouty arthritis130.4%
Nephrolithiasis120.4%

The indication field is filled in by the reporter and is often blank; shares are of all 3,100 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Uloric reports
Colchicine2608.4%
Prednisone1284.1%
Allopurinol1203.9%
Aspirin1103.5%
Lisinopril1043.4%
Furosemide742.4%
Lasix722.3%
Amlodipine612%
Metoprolol581.9%
Lipitor561.8%

Other products listed in reports where Uloric is a suspect product, whatever their own role. Co-listing means the two were recorded together; it says nothing about either product's part in the event. Only the 2,500 most-reported names are counted here.

In context

MeasureUloricXanthine oxidase inhibitorAll reports
Reports as suspect product3,10027,59020,646,523
Share of that pool—11.2%0%
Reports, latest 12 months13—1,332,454
Marked serious29.4%87.7%57.4%
Death recorded among outcomes, per 1,000 reports3713091
Hospitalisation recorded, per 1,000 reports120518213
Consumer-filed share29.9%13.7%45.8%
Top term, share of reportsGout 14.5%median 2.7%0.1%

Shares are of reports, not of patients treated. The number of people taking a product is not in the data, so none of these figures is a rate, and differences between columns reflect who takes a product, who reports and how long it has been sold. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."

Other drugs in the xanthine oxidase inhibitor class

DrugName typeReportsLatest 12 monthsMarked serious
Allopurinolgeneric22,5141,23895.1%
Febuxostatgeneric1,97615495.2%

Ordered by report count for navigation only. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic." A brand and its generic are separate rows because reporters name them separately.

Questions about Uloric reports

How many adverse event reports has FDA received for Uloric?

3,100 reports list Uloric as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 13 of them arrived in the latest 12 months. Another 3,766 list it only as a concomitant medication.

What reactions are recorded in Uloric reports?

gout (14.5%), rash (9.1%), drug ineffective (4.6%), nausea (4.6%) and diarrhoea (3.5%). These are MedDRA preferred terms coded from what the reporter described; a report can list several, and a term's presence is not a finding that Uloric was responsible.

How serious are the reports?

29.4% are marked serious by the reporter. Among the outcomes recorded, 3.7% of reports include death and 12% include hospitalisation. FDA has not verified these outcomes and states that the reports "cannot be used to estimate the incidence" of the events.

Who files these reports?

physician (40.4%), consumer or non-health professional (29.9%) and other health professional (16.9%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Uloric rising?

13 reports in the 12 months to June 2026, down 48% from 25 in the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Counts also move with how many people take a product, its time on the market and publicity.

Do these reports show that Uloric was responsible for these reactions?

No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event." The reaction may relate to the condition being treated, to other medicines, or to something else.

Is this a list of the side effects of Uloric?

No. It is a count of what was reported to FDA. The adverse reactions observed in clinical studies are printed on the FDA-approved label, which a pharmacist or clinician can go through with you.

How do I report an adverse event?

Consumers and health professionals can report to FDA through MedWatch (Form FDA 3500 online, or 1-800-FDA-1088), or to the manufacturer, which must pass reports on. See the guide on how to report.

Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. A report counts here when it lists Uloric as a suspect or interacting product; reports listing it only as a concomitant medication (3,766) are excluded. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.

Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.