Reported Reactions

Drugs › Kinase inhibitor

Brand name · Larotrectinib

Vitrakvi: adverse event reports filed with FDA

659 reports list it as a suspect or interacting product, 2019–2026. Class: Kinase inhibitor.

659
reports as suspect product
0% of all reports · about 88 a year
52
reports, 12 months to June 2026
68 in the 12 months before
68.4%
marked serious by the reporter
70.8% across the class
15.8%
record death among outcomes, as reported
104 reports · not verified by FDA

Between January 2019 and June 2026, 659 adverse event reports received by FDA list the brand name Vitrakvi (larotrectinib) as a suspect or interacting product. Reports that mention it only as a concomitant medication (6) are left out of every figure here.

In the 12 months to June 2026, 52 reports listed it, down 24% from 68 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 88 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.

Reporters most often recorded dizziness (7.3%), death (6.5%) and pain (5.9%). A report can list several reactions, so shares add to more than 100%; 152 different terms appear across these reports. Dizziness is recorded in 7.3% of these reports, a larger share than in the median kinase inhibitor drug (1.7%).

68.4% of the reports are marked serious by the reporter (70.8% across the class); 15.8% record death among the outcomes and 17.3% record hospitalisation, as reported. 37.3% of the reports came from physicians, and the largest patient age group is 45 to 64 (15.2%). 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

0917Jul 2021: 10Aug 2021: 15Sep 2021: 4Oct 2021: 12Nov 2021: 10Dec 2021: 112022Jan 2022: 2Feb 2022: 7Mar 2022: 10Apr 2022: 3May 2022: 11Jun 2022: 11Jul 2022: 9Aug 2022: 17Sep 2022: 11Oct 2022: 8Nov 2022: 10Dec 2022: 62023Jan 2023: 10Feb 2023: 6Mar 2023: 14Apr 2023: 5May 2023: 5Jun 2023: 5Jul 2023: 9Aug 2023: 16Sep 2023: 1Oct 2023: 7Nov 2023: 11Dec 2023: 112024Jan 2024: 5Feb 2024: 2Mar 2024: 4Apr 2024: 5May 2024: 4Jun 2024: 5Jul 2024: 10Aug 2024: 6Sep 2024: 6Oct 2024: 6Nov 2024: 4Dec 2024: 22025Jan 2025: 8Feb 2025: 7Mar 2025: 7Apr 2025: 6May 2025: 5Jun 2025: 1Jul 2025: 3Aug 2025: 8Sep 2025: 5Oct 2025: 2Nov 2025: 10Dec 2025: 52026Jan 2026: 3Feb 2026: 2Mar 2026: 3Apr 2026: 2May 2026: 6Jun 2026: 3

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

0571142019: 8320192020: 11420202021: 11220212022: 10520222023: 10020232024: 5920242025: 6720252026: 192026

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Vitrakvi reports recording the termmedian drug in kinase inhibitor

  1. Dizzinesslight-headedness or unsteadiness7.3%48
  2. Deaththe patient died; cause not stated by this term6.5%43
  3. Painpain, site not specified5.9%39
  4. Fatiguetiredness5.8%38
  5. Drug ineffectivethe medicine did not work as expected5.2%34
  6. Neuropathy peripheralnerve damage in hands or feet4.4%29
  7. Disease progressionthe disease advanced3.5%23
  8. Myalgiamuscle pain3.5%23
  9. Nauseafeeling sick3%20
  10. Off label useused for a purpose or in a way not on the label3%20
  11. Paraesthesiatingling or pins and needles2.6%17
  12. Falla fall2.3%15
  13. Weight increasedweight gain2.1%14
  14. Anaemialow red blood cells2%13
  15. Arthralgiajoint pain2%13
  16. Vomitingbeing sick2%13
  17. Diarrhoealoose or frequent stools1.7%11
  18. Dyspnoeashortness of breath1.7%11
  19. Hepatic enzyme increasedraised liver enzymes1.5%10
  20. Hospitalisationadmission to hospital1.5%10
  21. Gait disturbancedifficulty walking1.4%9
  22. Hypoaesthesianumbness1.4%9
  23. Pain in extremitypain in an arm or leg1.4%9
  24. Alanine aminotransferase increasedraised liver enzyme (ALT)1.2%8
  25. Astheniaweakness or lack of energy1.2%8
  26. Headachehead pain1.2%8
  27. Pyrexiafever1.2%8
  28. Rashskin rash1.2%8

Top 30 of 152 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

Death15.8%104
Life-threatening0.9%6
Hospitalisation (initial or prolonged)17.3%114
Disability0.5%3
Congenital anomaly0.2%1
Other serious44.9%296
Not serious31.6%208

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 22.3%15
2 to 113.6%24
12 to 172.1%14
18 to 446.5%43
45 to 6415.2%100
65 to 7413.4%88
75 and over6.8%45
Age not given50.1%330

Patient sex

Female44.3%292
Male40.4%266
Not given15.3%101

Who reported

Physician37.3%246
Pharmacist5.8%38
Other health professional29.7%196
Lawyer0%0
Consumer or non-health professional27%178
Not given0.2%1

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 64.6% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Thyroid cancer345.2%
Neoplasm223.3%
Neoplasm malignant223.3%
Lung neoplasm malignant192.9%
Sarcoma172.6%
Ntrk gene fusion positive152.3%

The indication field is filled in by the reporter and is often blank; shares are of all 659 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Vitrakvi reports
Pantoprazole81.2%
Atenolol71.1%
Dexamethasone60.9%
Entrectinib60.9%
Ergocalciferol60.9%
Exforge60.9%
Levothyroxine sodium60.9%
Potassium chloride60.9%
Rosuvastatin60.9%
Alprazolam50.8%

Other products listed in reports where Vitrakvi 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

MeasureVitrakviKinase inhibitorAll reports
Reports as suspect product659849,16120,646,523
Share of that pool—0.1%0%
Reports, latest 12 months52—1,332,454
Marked serious68.4%70.8%57.4%
Death recorded among outcomes, per 1,000 reports15819091
Hospitalisation recorded, per 1,000 reports173264213
Consumer-filed share27%42.3%45.8%
Top term, share of reportsDizziness 7.3%median 1.7%2.4%

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 Vitrakvi reports

How many adverse event reports has FDA received for Vitrakvi?

659 reports list Vitrakvi as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 52 of them arrived in the latest 12 months. Another 6 list it only as a concomitant medication.

What reactions are recorded in Vitrakvi reports?

dizziness (7.3%), death (6.5%), pain (5.9%), fatigue (5.8%) and drug ineffective (5.2%). 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 Vitrakvi was responsible.

How serious are the reports?

68.4% are marked serious by the reporter. Among the outcomes recorded, 15.8% of reports include death and 17.3% 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?

physician (37.3%), other health professional (29.7%) and consumer or non-health professional (27%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Vitrakvi rising?

52 reports in the 12 months to June 2026, down 24% from 68 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 Vitrakvi 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 Vitrakvi?

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 Vitrakvi as a suspect or interacting product; reports listing it only as a concomitant medication (6) 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.