Reported Reactions

Drugs › Kinase inhibitor

Brand name · Vimseltinib

Romvimza: adverse event reports filed with FDA

528 reports list it as a suspect or interacting product, 2025–2026. Class: Kinase inhibitor.

528
reports as suspect product
0% of all reports · about 354 a year
455
reports, 12 months to June 2026
73 in the 12 months before
12.7%
marked serious by the reporter
70.8% across the class
0.2%
record death among outcomes, as reported
1 reports · not verified by FDA

528 adverse event reports received by FDA list the brand name Romvimza (vimseltinib) as a suspect or interacting product, from January 2025 to June 2026. A further 0 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, 455 reports listed it, up 523% from 73 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 354 reports a year and 0% of the 20,646,523 reports in the database, and 0.1% of the reports for the kinase 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 fatigue (25.2%), swelling face (13.1%) and pruritus (11.9%). A report can list several reactions, so shares add to more than 100%; 153 different terms appear across these reports. Fatigue is recorded in 25.2% of these reports, a larger share than in the median kinase inhibitor drug (5.7%).

12.7% of the reports are marked serious by the reporter (70.8% across the class); 0.2% record death among the outcomes and 3% record hospitalisation, as reported. 85.2% of the reports came from consumers, and the largest patient age group is 18 to 44 (51.3%). 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

02753Jul 2021: 0Aug 2021: 0Sep 2021: 0Oct 2021: 0Nov 2021: 0Dec 2021: 02022Jan 2022: 0Feb 2022: 0Mar 2022: 0Apr 2022: 0May 2022: 0Jun 2022: 0Jul 2022: 0Aug 2022: 0Sep 2022: 0Oct 2022: 0Nov 2022: 0Dec 2022: 02023Jan 2023: 0Feb 2023: 0Mar 2023: 0Apr 2023: 0May 2023: 0Jun 2023: 0Jul 2023: 0Aug 2023: 0Sep 2023: 0Oct 2023: 0Nov 2023: 0Dec 2023: 02024Jan 2024: 0Feb 2024: 0Mar 2024: 0Apr 2024: 0May 2024: 0Jun 2024: 0Jul 2024: 0Aug 2024: 0Sep 2024: 0Oct 2024: 0Nov 2024: 0Dec 2024: 02025Jan 2025: 1Feb 2025: 0Mar 2025: 0Apr 2025: 15May 2025: 27Jun 2025: 30Jul 2025: 38Aug 2025: 26Sep 2025: 45Oct 2025: 41Nov 2025: 36Dec 2025: 532026Jan 2026: 44Feb 2026: 31Mar 2026: 37Apr 2026: 53May 2026: 46Jun 2026: 5

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

Reactions recorded in the reports

share of Romvimza reports recording the termmedian drug in kinase inhibitor

  1. Fatiguetiredness25.2%133
  2. Swelling facea swollen face13.1%69
  3. Pruritusitching11.9%63
  4. Peripheral swellingswelling of the arms or legs9.5%50
  5. Product use issuea problem in how the product was used8.5%45
  6. Arthralgiajoint pain8%42
  7. Rashskin rash8%42
  8. Nauseafeeling sick7.8%41
  9. Eye swellinga swollen eye7.6%40
  10. Headachehead pain7.4%39
  11. Product dose omission issuea dose was missed6.3%33
  12. Hepatic enzyme increasedraised liver enzymes6.1%32
  13. Astheniaweakness or lack of energy5.1%27
  14. Painpain, site not specified4.9%26
  15. Aspartate aminotransferase increasedraised liver enzyme (AST)4.2%22
  16. Lacrimation increasedwatery eyes3.6%19
  17. Hypertensionhigh blood pressure3.4%18
  18. Diarrhoealoose or frequent stools3.2%17
  19. Brain fog2.8%15
  20. Blood cholesterol increasedraised cholesterol2.7%14
  21. Blood pressure increaseda raised blood pressure reading2.7%14
  22. Joint swellinga swollen joint2.7%14
  23. Nasopharyngitisa cold2.7%14
  24. Pain in extremitypain in an arm or leg2.5%13
  25. Somnolencedrowsiness2.5%13
  26. Swellingswelling2.5%13
  27. Vision blurredblurred vision2.5%13

Top 30 of 153 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 100 drugs in the kinase 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

Death0.2%1
Life-threatening0%0
Hospitalisation (initial or prolonged)3%16
Disability0%0
Congenital anomaly0%0
Other serious10.8%57
Not serious87.3%461

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 849,161 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%0
2 to 110%0
12 to 171.3%7
18 to 4451.3%271
45 to 6428.4%150
65 to 749.3%49
75 and over3.4%18
Age not given6.3%33

Patient sex

Female61.4%324
Male35.2%186
Not given3.4%18

Who reported

Physician8.7%46
Pharmacist1.3%7
Other health professional4.7%25
Lawyer0%0
Consumer or non-health professional85.2%450
Not given0%0

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 99.2% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Connective tissue neoplasm22642.8%
Giant cell tumour of tendon sheath21540.7%
Synovitis203.8%
Neoplasm61.1%
Desmoid tumour50.9%
Soft tissue neoplasm40.8%

The indication field is filled in by the reporter and is often blank; shares are of all 528 reports.

In context

MeasureRomvimzaKinase inhibitorAll reports
Reports as suspect product528849,16120,646,523
Share of that pool—0.1%0%
Reports, latest 12 months455—1,332,454
Marked serious12.7%70.8%57.4%
Death recorded among outcomes, per 1,000 reports219091
Hospitalisation recorded, per 1,000 reports30264213
Consumer-filed share85.2%42.3%45.8%
Top term, share of reportsFatigue 25.2%median 5.7%3.7%

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 kinase inhibitor class

DrugName typeReportsLatest 12 monthsMarked serious
Ibrancebrand81,9122,38047.1%
Imbruvicabrand67,0392,28374.4%
Cabometyxbrand41,8184,90440.4%
Sutentbrand33,21517574.5%
Afinitorbrand30,70616171.3%
Sprycelbrand27,25555749.7%
Tasignabrand24,91132870.9%
Kisqalibrand24,6033,41379.2%
Ofevbrand23,9072,43466.9%
Gleevecbrand23,1328174.7%
Tagrissobrand23,0851,41092.3%
Lenvimabrand22,3502,64387.3%
Votrientbrand22,08411960.9%
Mekinistbrand17,07091664%
Inlytabrand15,69638860.9%

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 Romvimza reports

How many adverse event reports has FDA received for Romvimza?

528 reports list Romvimza as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 455 of them arrived in the latest 12 months. Another 0 list it only as a concomitant medication.

What reactions are recorded in Romvimza reports?

fatigue (25.2%), swelling face (13.1%), pruritus (11.9%), periorbital swelling (11.4%) and peripheral swelling (9.5%). 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 Romvimza was responsible.

How serious are the reports?

12.7% are marked serious by the reporter. Among the outcomes recorded, 0.2% of reports include death and 3% 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?

consumer or non-health professional (85.2%), physician (8.7%) and other health professional (4.7%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Romvimza rising?

455 reports in the 12 months to June 2026, up 523% from 73 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 Romvimza 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 Romvimza?

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 Romvimza as a suspect or interacting product; reports listing it only as a concomitant medication (0) 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.