Reported Reactions

Adverse event reports that FDA received

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Edition of November 2026

Made from the update of 2 Nov 2026. The drug data run through 30 Jun 2026. The edition before is October 2026.

What a report is

A report is not proof that a medicine or a device was the cause of an event.

FDA says:

Adverse event reports submitted to FDA do not undergo extensive validation or verification. Therefore, a causal relationship cannot be established between product and reactions listed in a report. While a suspected relationship may exist, it is not medically validated and should not be the sole source of information for clinical decision making or other assumptions about the safety or efficacy of a product. Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.

Source: openFDA, Drug Adverse Event Overview, section "Responsible use of the data". The site read the page on . The data have the reports that FDA received through .

FDA also says:

There is no certainty that the reported event (adverse event or medication error) was actually due to the product. FDA does not require that a causal relationship between a product and event be proven, and reports do not always contain enough detail to properly evaluate an event. The information in these reports has not been scientifically or otherwise verified as to a cause and effect relationship and cannot be used to estimate the incidence of these events.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated.

Source: openFDA, Response of the drug event API (meta.disclaimer). The site read the page on .

Not medical advice. This site counts what was reported to FDA. Questions about a medicine or device belong with a pharmacist or clinician.

Counts for all reports

The change is for all reports of the dataset between two editions. It is not a change for one drug or one device.

FDA says:

Many factors can influence whether or not an event will be reported, such as the time a product has been marketed and publicity about an event.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

The information in these reports cannot be used to estimate the incidence (occurrence rates) of the events reported.

Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of . The site read the page on .

Counts of all reports in the edition of November 2026 and the edition of October 2026
CountThis editionEdition beforeChange
Drug reports (FAERS) that FDA received since 200420,646,523 (to June 2026)20,646,523 (to June 2026)no change
Device reports (MAUDE) that FDA received26,326,888 (to September 2026)26,326,888 (to September 2026)no change
Drug reports in the latest 12 months1,332,454 (12 months to June 2026)1,332,454 (12 months to June 2026)no change
Device reports in the latest 12 months3,444,740 (12 months to September 2026)3,444,740 (12 months to September 2026)no change
Drug reports in the latest closed quarter352,949 (April to June 2026)352,949 (April to June 2026)no change
Device reports in the latest closed quarter923,529 (April to June 2026)923,529 (April to June 2026)no change
Device data run through30 Sep 202630 Sep 2026n/a

Search engines list 2,888 pages of drugs, devices, device types, drug classes, manufacturers, reaction terms and months in this edition.

Updates in this month

The record of updates has no entry dated in November 2026. The record of updates.

Reaction terms by number of reports, 12 months to June 2026

In the 12 months to June 2026, the reaction term in the most drug reports was Off label use: 79,953 reports.

The rows are the first 10 rows of the first table of the finding in the edition of November 2026. The rows are not products.

FDA says:

Many factors can influence whether or not an event will be reported, such as the time a product has been marketed and publicity about an event.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

The information in these reports cannot be used to estimate the incidence (occurrence rates) of the events reported.

Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of . The site read the page on .

The first 10 rows of the table in the edition of November 2026
RowNameFigureRow in the edition before
1Off label use79,9531
2Drug ineffective71,4992
3Product dose omission issue48,9303
4Nausea48,7164
5Death48,7025
6Fatigue45,5136
7Diarrhoea43,9377
8Pruritus35,2338
9Headache34,4269
10Dyspnoea30,57210

The full table of this finding, with the figures of the newest update.

Drug and device reports that FDA received, by year

FDA received 1,307,769 drug reports in 2025 and 1,319,106 in 2024.

The rows are the first 10 rows of the first table of the finding in the edition of November 2026. The rows are not products.

FDA says:

Many factors can influence whether or not an event will be reported, such as the time a product has been marketed and publicity about an event.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

The information in these reports cannot be used to estimate the incidence (occurrence rates) of the events reported.

Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of . The site read the page on .

The first 10 rows of the table in the edition of November 2026
RowNameFigureRow in the edition before
12026673,772 (to June 2026)1
220251,307,7692
320241,319,1063
420231,368,5724
520221,523,6645
620211,566,1486
720201,455,1177
820191,434,1958
920181,428,1219
1020171,251,77810

The full table of this finding, with the figures of the newest update.

Device reports by FDA panel, 12 months to September 2026

In the 12 months to September 2026, the panel with the most device reports was Clinical Chemistry: 1,092,879 reports.

The rows are the first 10 rows of the first table of the finding in the edition of November 2026. The rows are not products.

FDA says:

MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices.

Source: openFDA, Manufacturer and User Facility Device Experience. The site read the page on .

The first 10 rows of the table in the edition of November 2026
RowNameFigureRow in the edition before
1Clinical Chemistry1,092,8791
2Dental755,0112
3Unknown499,4223
4General Hospital274,5344
5Gastroenterology, Urology228,9735
6Anesthesiology170,9796
7General, Plastic Surgery118,9217
8Cardiovascular112,7188
9Orthopedic73,7299
10Physical Medicine19,01510

The full table of this finding, with the figures of the newest update.

Who sends drug and device reports to FDA

Reports from consumers or other non-health professionals were 45.8% of the 20,646,523 drug reports that FDA received from January 2004 to June 2026.

The rows are the first 6 rows of the first table of the finding in the edition of November 2026. The rows are not products.

FDA says:

Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.

Source: openFDA, Drug Adverse Event Overview. The site read the page on .

Importantly, the AEMS data by themselves are not an indicator of the safety profile of the drug or biologic.

Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of . The site read the page on .

The first 6 rows of the table in the edition of November 2026
RowNameFigureRow in the edition before
1Consumer or non-health professional9,459,1841
2Physician4,526,0082
3Other health professional4,076,1603
4Pharmacist1,300,3964
5Lawyer544,3335
6Not given740,4426

The full table of this finding, with the figures of the newest update.

How an edition is made

A program writes each edition from the figures that the site shows in that month, with fixed sentence rules. A month keeps the figures of its last update. A change is between this edition and the edition before. It is not a change in how often an event happens.