Brand name · Datopotamab deruxtecan
Datroway: adverse event reports filed with FDA
547 reports list it as a suspect or interacting product, 2025–2026.
- 547
- reports as suspect product
- 0% of all reports · about 389 a year
- 468
- reports, 12 months to June 2026
- 79 in the 12 months before
- 55%
- marked serious by the reporter
- 57.4% across all reports
- 18.6%
- record death among outcomes, as reported
- 102 reports · not verified by FDA
547 adverse event reports received by FDA list the brand name Datroway (datopotamab deruxtecan) as a suspect or interacting product, from February 2025 to June 2026. A further 2 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, 468 reports listed it, up 492% from 79 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 389 reports a year and 0% of the 20,646,523 reports in the database. How many people take it is not in the data, so a count is not a rate of occurrence.
Reporters most often recorded disease progression (27.6%), off label use (18.5%) and stomatitis (16.6%). A report can list several reactions, so shares add to more than 100%; 113 different terms appear across these reports. Disease progression is recorded in 27.6% of these reports, against 0.6% of all reports in the database.
55% of the reports are marked serious by the reporter; 18.6% record death among the outcomes and 14.6% record hospitalisation, as reported. 49.9% of the reports came from physicians, and the largest patient age group is 45 to 64 (23.2%). 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
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 Datroway reports recording the termall reports in the database
- Disease progressionthe disease advanced27.6%151
- Off label useused for a purpose or in a way not on the label18.5%101
- Stomatitissore mouth16.6%91
- No adverse eventno adverse event was reported8.2%45
- Nauseafeeling sick5.1%28
- Interstitial lung diseasescarring or inflammation of lung tissue4.4%24
- Deaththe patient died; cause not stated by this term4%22
- Fatiguetiredness4%22
- Dry eyedry eye3.7%20
- Dyspnoeashortness of breath3.1%17
- Weight decreasedweight loss3.1%17
- Infusion related reactiona reaction during or soon after an infusion2.9%16
- Coughcough2.7%15
- Mucosal inflammation2.7%15
- Rashskin rash2.7%15
- Alopeciahair loss2.6%14
- Malaisegeneral feeling of being unwell2.4%13
- Pneumonitis2.2%12
- Vision blurredblurred vision2%11
- Oral pain1.8%10
- Product dose omission issuea dose was missed1.8%10
- Keratitis1.5%8
- Prescribed underdose1.5%8
- Metastases to liver1.1%6
- Osteonecrosis of jawdeath of jaw bone tissue1.1%6
- Pruritusitching1.1%6
- Pyrexiafever1.1%6
- Weight increasedweight gain1.1%6
- Dysarthria0.9%5
Top 30 of 113 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 share of all reports in the database; 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
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 20,646,523 reports. 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
Patient sex
Who reported
Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 61.6% of reports give the United States as the country of the event or reporter.
Reason for use recorded
| Indication as recorded (MedDRA) | Reports | Share |
|---|---|---|
| Hormone receptor positive her2 negative breast cancer | 165 | 30.2% |
| Breast cancer | 62 | 11.3% |
| Lung neoplasm malignant | 48 | 8.8% |
| Non-small cell lung cancer | 48 | 8.8% |
| Breast cancer metastatic | 24 | 4.4% |
| Triple negative breast cancer | 16 | 2.9% |
The indication field is filled in by the reporter and is often blank; shares are of all 547 reports.
In context
| Measure | Datroway | All reports |
|---|---|---|
| Reports as suspect product | 547 | 20,646,523 |
| Share of that pool | — | 0% |
| Reports, latest 12 months | 468 | 1,332,454 |
| Marked serious | 55% | 57.4% |
| Death recorded among outcomes, per 1,000 reports | 186 | 91 |
| Hospitalisation recorded, per 1,000 reports | 146 | 213 |
| Consumer-filed share | 6.8% | 45.8% |
| Top term, share of reports | Disease progression 27.6% | 0.6% |
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."
Questions about Datroway reports
How many adverse event reports has FDA received for Datroway?
547 reports list Datroway as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 468 of them arrived in the latest 12 months. Another 2 list it only as a concomitant medication.
What reactions are recorded in Datroway reports?
disease progression (27.6%), off label use (18.5%), stomatitis (16.6%), no adverse event (8.2%) and nausea (5.1%). 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 Datroway was responsible.
How serious are the reports?
55% are marked serious by the reporter. Among the outcomes recorded, 18.6% of reports include death and 14.6% 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 (49.9%), other health professional (31.4%) and pharmacist (11.9%). Most reports reach FDA through the manufacturer, which must forward reports it receives.
Are reports for Datroway rising?
468 reports in the 12 months to June 2026, up 492% from 79 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 Datroway 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 Datroway?
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 Datroway as a suspect or interacting product; reports listing it only as a concomitant medication (2) 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.