Reported Reactions

Drugs › Azole antifungal

Brand name · Voriconazole

Vfend: adverse event reports filed with FDA

6,752 reports list it as a suspect or interacting product, 2004–2026. Class: Azole antifungal. Also reported as Vfend Tablets, Vfend Oral Suspension.

6,752
reports as suspect product
0% of all reports · about 300 a year
76
reports, 12 months to June 2026
75 in the 12 months before
86.5%
marked serious by the reporter
79% across the class
27.2%
record death among outcomes, as reported
1,835 reports · not verified by FDA

6,752 adverse event reports received by FDA list the brand name Vfend (voriconazole) as a suspect or interacting product, from January 2004 to June 2026. A further 2,051 reports list it only as a concomitant medication, and those are not counted in the figures on this page.

In the 12 months to June 2026, 76 reports listed it, close to the 75 of 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 300 reports a year and 0% of the 20,646,523 reports in the database, and 9.8% of the reports for the azole antifungal class. How many people take it is not in the data, so a count is not a rate of occurrence.

The reactions recorded most often are death (10.1%), drug interaction (5%) and off label use (4.2%). A report can list several reactions, so shares add to more than 100%; 900 different terms appear across these reports. Death is recorded in 10.1% of these reports, a larger share than in the median azole antifungal drug (1.6%).

86.5% of the reports are marked serious by the reporter (79% across the class); 27.2% record death among the outcomes and 31.5% record hospitalisation, as reported. 34.2% of the reports came from physicians, and the largest patient age group is 45 to 64 (22.3%). 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

01836Jul 2021: 24Aug 2021: 18Sep 2021: 10Oct 2021: 15Nov 2021: 8Dec 2021: 162022Jan 2022: 17Feb 2022: 24Mar 2022: 36Apr 2022: 20May 2022: 26Jun 2022: 21Jul 2022: 19Aug 2022: 11Sep 2022: 17Oct 2022: 21Nov 2022: 14Dec 2022: 222023Jan 2023: 13Feb 2023: 15Mar 2023: 20Apr 2023: 9May 2023: 11Jun 2023: 6Jul 2023: 2Aug 2023: 7Sep 2023: 2Oct 2023: 7Nov 2023: 16Dec 2023: 92024Jan 2024: 8Feb 2024: 8Mar 2024: 6Apr 2024: 4May 2024: 5Jun 2024: 3Jul 2024: 2Aug 2024: 7Sep 2024: 5Oct 2024: 5Nov 2024: 6Dec 2024: 62025Jan 2025: 8Feb 2025: 6Mar 2025: 6Apr 2025: 9May 2025: 11Jun 2025: 4Jul 2025: 7Aug 2025: 10Sep 2025: 10Oct 2025: 4Nov 2025: 9Dec 2025: 92026Jan 2026: 5Feb 2026: 2Mar 2026: 6Apr 2026: 1May 2026: 4Jun 2026: 9

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

02665312004: 20420042005: 2032006: 2602007: 19220072008: 1652009: 2412010: 41920102011: 3572012: 5312013: 42420132014: 4822015: 5072016: 48520162017: 4852018: 3652019: 41820192020: 2682021: 1962022: 24820222023: 1172024: 652025: 9320252026: 27

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Vfend reports recording the termmedian drug in azole antifungal

  1. Deaththe patient died; cause not stated by this term10.1%680
  2. Drug interactionan interaction between medicines5%339
  3. Off label useused for a purpose or in a way not on the label4.2%285
  4. Hallucinationseeing or hearing things that are not there4.2%281
  5. Drug ineffectivethe medicine did not work as expected3.8%254
  6. Pneumonialung infection3.4%227
  7. Condition aggravatedthe condition being treated got worse3.3%224
  8. Pyrexiafever3.2%216
  9. Visual impairmentreduced vision2.8%189
  10. Malaisegeneral feeling of being unwell2.6%175
  11. Photosensitivity reactionskin reaction to sunlight2.5%166
  12. Nauseafeeling sick2.4%165
  13. Vision blurredblurred vision2.4%164
  14. Confusional stateconfusion2.4%159
  15. Drug level increaseda raised blood level of the medicine2.4%159
  16. Dyspnoeashortness of breath2.4%159
  17. Renal failurekidney failure2%137
  18. Rashskin rash1.9%128
  19. Respiratory failurethe lungs could not supply enough oxygen1.6%110
  20. Deliriumsudden confusion1.6%108
  21. Dizzinesslight-headedness or unsteadiness1.6%108
  22. Weight decreasedweight loss1.6%107
  23. Disease progressionthe disease advanced1.6%105
  24. Astheniaweakness or lack of energy1.4%96
  25. Aspartate aminotransferase increasedraised liver enzyme (AST)1.4%93

Top 30 of 900 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 16 drugs in the azole antifungal 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

Death27.2%1,835
Life-threatening5.8%389
Hospitalisation (initial or prolonged)31.5%2,126
Disability2.5%166
Congenital anomaly0.1%4
Other serious48.8%3,292
Not serious13.5%913

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 69,035 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 20.3%20
2 to 111.8%124
12 to 172.2%151
18 to 449.4%632
45 to 6422.3%1,503
65 to 7420.3%1,372
75 and over13.4%907
Age not given30.3%2,043

Patient sex

Female34.2%2,307
Male53.7%3,629
Not given12.1%816

Who reported

Physician34.2%2,311
Pharmacist11.4%767
Other health professional20.7%1,400
Lawyer0.1%5
Consumer or non-health professional29.7%2,004
Not given3.9%265

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 45.6% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Bronchopulmonary aspergillosis74311%
Aspergillus infection5137.6%
Fungal infection4737%
Aspergillosis4556.7%
Pneumonia fungal1011.5%
Prophylaxis951.4%

The indication field is filled in by the reporter and is often blank; shares are of all 6,752 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Vfend reports
Bactrim2643.9%
Prednisone2213.3%
Omeprazole1832.7%
Vancomycin1752.6%
Prograf1562.3%
CellCept1552.3%
Ambisome1452.1%
Furosemide1241.8%
Lasix1221.8%
Tacrolimus1191.8%

Other products listed in reports where Vfend 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

MeasureVfendAzole antifungalAll reports
Reports as suspect product6,75269,03520,646,523
Share of that pool—9.8%0%
Reports, latest 12 months76—1,332,454
Marked serious86.5%79%57.4%
Death recorded among outcomes, per 1,000 reports27217791
Hospitalisation recorded, per 1,000 reports315317213
Consumer-filed share29.7%23.9%45.8%
Top term, share of reportsDeath 10.1%median 1.6%4.1%

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 azole antifungal class

DrugName typeReportsLatest 12 monthsMarked serious
Fluconazolegeneric17,1751,45890.7%
Voriconazolegeneric13,49595694.7%
Itraconazolegeneric4,55236490.4%
Posaconazolegeneric4,23458991.7%
Ketoconazolegeneric4,04723441.7%
Noxafilbrand3,2303966.7%
Diflucanbrand3,1476569.8%
Clotrimazolegeneric2,75729880.4%
Cresembabrand2,05025457.5%
Sporanoxbrand1,7284387.6%
Tioconazolegeneric1,4691973.1%
Jubliabrand1,2717918%
Miconazole nitrategeneric1,26016622.5%
Nizoralbrand1,21834829.5%
Miconazolegeneric6503072.3%

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 Vfend reports

How many adverse event reports has FDA received for Vfend?

6,752 reports list Vfend as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 76 of them arrived in the latest 12 months. Another 2,051 list it only as a concomitant medication.

What reactions are recorded in Vfend reports?

death (10.1%), drug interaction (5%), off label use (4.2%), hallucination (4.2%) and drug ineffective (3.8%). 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 Vfend was responsible.

How serious are the reports?

86.5% are marked serious by the reporter. Among the outcomes recorded, 27.2% of reports include death and 31.5% 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 (34.2%), consumer or non-health professional (29.7%) and other health professional (20.7%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Vfend rising?

76 reports in the 12 months to June 2026, close to the 75 of 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 Vfend 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 Vfend?

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 Vfend as a suspect or interacting product; reports listing it only as a concomitant medication (2,051) 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.