Reported Reactions

Drugs › Kinase inhibitor

Brand name · Lorlatinib

Lorbrena: adverse event reports filed with FDA

3,022 reports list it as a suspect or interacting product, 2018–2026. Class: Kinase inhibitor.

3,022
reports as suspect product
0% of all reports · about 394 a year
812
reports, 12 months to June 2026
515 in the 12 months before
75.8%
marked serious by the reporter
70.8% across the class
26%
record death among outcomes, as reported
787 reports · not verified by FDA

3,022 adverse event reports received by FDA list the brand name Lorbrena (lorlatinib) as a suspect or interacting product, from November 2018 to June 2026. A further 87 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, 812 reports listed it, up 58% from 515 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 394 reports a year and 0% of the 20,646,523 reports in the database, and 0.4% 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 death (17.9%), neoplasm progression (10.5%) and off label use (6.6%). A report can list several reactions, so shares add to more than 100%; 420 different terms appear across these reports. Death is recorded in 17.9% of these reports, a larger share than in the median kinase inhibitor drug (7.6%).

75.8% of the reports are marked serious by the reporter (70.8% across the class); 26% record death among the outcomes and 18.4% record hospitalisation, as reported. 43.1% of the reports came from consumers, and the largest patient age group is 45 to 64 (26.6%). 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

04896Jul 2021: 21Aug 2021: 42Sep 2021: 26Oct 2021: 30Nov 2021: 16Dec 2021: 172022Jan 2022: 19Feb 2022: 17Mar 2022: 19Apr 2022: 34May 2022: 35Jun 2022: 24Jul 2022: 27Aug 2022: 22Sep 2022: 26Oct 2022: 16Nov 2022: 20Dec 2022: 312023Jan 2023: 40Feb 2023: 28Mar 2023: 47Apr 2023: 28May 2023: 26Jun 2023: 29Jul 2023: 33Aug 2023: 36Sep 2023: 27Oct 2023: 29Nov 2023: 25Dec 2023: 132024Jan 2024: 26Feb 2024: 25Mar 2024: 27Apr 2024: 32May 2024: 32Jun 2024: 40Jul 2024: 31Aug 2024: 52Sep 2024: 35Oct 2024: 37Nov 2024: 46Dec 2024: 492025Jan 2025: 37Feb 2025: 38Mar 2025: 38Apr 2025: 39May 2025: 56Jun 2025: 57Jul 2025: 96Aug 2025: 81Sep 2025: 64Oct 2025: 57Nov 2025: 55Dec 2025: 392026Jan 2026: 38Feb 2026: 52Mar 2026: 95Apr 2026: 72May 2026: 85Jun 2026: 78

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

03296572018: 1020182019: 29620192020: 27720202021: 27920212022: 29020222023: 36120232024: 43220242025: 65720252026: 4202026

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Lorbrena reports recording the termmedian drug in kinase inhibitor

  1. Deaththe patient died; cause not stated by this term17.9%541
  2. Off label useused for a purpose or in a way not on the label6.6%199
  3. Hallucinationseeing or hearing things that are not there6.5%195
  4. Weight increasedweight gain4.8%144
  5. Blood cholesterol increasedraised cholesterol4.5%136
  6. Oedemaswelling from fluid4.4%132
  7. Neuropathy peripheralnerve damage in hands or feet3.9%118
  8. Peripheral swellingswelling of the arms or legs3.9%117
  9. Memory impairmentmemory problems3.5%107
  10. Cognitive disorderproblems with thinking or memory3.5%105
  11. Fatiguetiredness3.4%104
  12. Dyspnoeashortness of breath3.3%100
  13. Oedema peripheralswelling of the legs, ankles or hands2.8%86
  14. Painpain, site not specified2.4%73
  15. Confusional stateconfusion2.3%69
  16. Diarrhoealoose or frequent stools2.3%69
  17. Hyperlipidaemiaraised blood fats2.3%69
  18. Pneumonialung infection2.3%69
  19. Arthralgiajoint pain2.1%62
  20. Dizzinesslight-headedness or unsteadiness2%59
  21. Headachehead pain1.8%54
  22. Disease progressionthe disease advanced1.8%53
  23. Pleural effusionfluid around the lung1.8%53
  24. Pain in extremitypain in an arm or leg1.7%52
  25. Malaisegeneral feeling of being unwell1.7%51
  26. Speech disordera speech problem1.6%49

Top 30 of 420 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

Death26%787
Life-threatening1.6%47
Hospitalisation (initial or prolonged)18.4%555
Disability0.8%23
Congenital anomaly0%0
Other serious44.9%1,358
Not serious24.2%730

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 20.2%6
2 to 111.4%41
12 to 170.2%7
18 to 447.5%227
45 to 6426.6%804
65 to 7416.5%500
75 and over10.2%308
Age not given37.4%1,129

Patient sex

Female46.8%1,414
Male41.3%1,247
Not given11.9%361

Who reported

Physician27.8%840
Pharmacist6.9%208
Other health professional18.1%548
Lawyer0%1
Consumer or non-health professional43.1%1,301
Not given4.1%124

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 53.6% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Lung neoplasm malignant59619.7%
Non-small cell lung cancer38312.7%
Non-small cell lung cancer metastatic913%
Lung adenocarcinoma571.9%
Lung carcinoma cell type unspecified stage 0551.8%
Lung cancer metastatic461.5%

The indication field is filled in by the reporter and is often blank; shares are of all 3,022 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Lorbrena reports
Capecitabine581.9%
Trastuzumab571.9%
Pemetrexed541.8%
Oxaliplatin531.8%
Docetaxel521.7%
Eliquis511.7%
Alunbrig481.6%
Bevacizumab481.6%
Rosuvastatin451.5%
Alecensa441.5%

Other products listed in reports where Lorbrena 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

MeasureLorbrenaKinase inhibitorAll reports
Reports as suspect product3,022849,16120,646,523
Share of that pool—0.4%0%
Reports, latest 12 months812—1,332,454
Marked serious75.8%70.8%57.4%
Death recorded among outcomes, per 1,000 reports26019091
Hospitalisation recorded, per 1,000 reports184264213
Consumer-filed share43.1%42.3%45.8%
Top term, share of reportsDeath 17.9%median 7.6%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 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 Lorbrena reports

How many adverse event reports has FDA received for Lorbrena?

3,022 reports list Lorbrena as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 812 of them arrived in the latest 12 months. Another 87 list it only as a concomitant medication.

What reactions are recorded in Lorbrena reports?

death (17.9%), neoplasm progression (10.5%), off label use (6.6%), hallucination (6.5%) and weight increased (4.8%). 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 Lorbrena was responsible.

How serious are the reports?

75.8% are marked serious by the reporter. Among the outcomes recorded, 26% of reports include death and 18.4% 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 (43.1%), physician (27.8%) and other health professional (18.1%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Lorbrena rising?

812 reports in the 12 months to June 2026, up 58% from 515 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 Lorbrena 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 Lorbrena?

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 Lorbrena as a suspect or interacting product; reports listing it only as a concomitant medication (87) 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.