Reported Reactions

Adverse event reports that FDA received

  • Search
  • Watch list

Edition of October 2026

Made from the update of 18 Oct 2026. The drug data run through 30 Jun 2026. This is the first edition of the site.

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 October 2026
CountThis edition
Drug reports (FAERS) that FDA received since 200420,646,523 (to June 2026)
Device reports (MAUDE) that FDA received26,326,888 (to September 2026)
Drug reports in the latest 12 months1,332,454 (12 months to June 2026)
Device reports in the latest 12 months3,444,740 (12 months to September 2026)
Drug reports in the latest closed quarter352,949 (April to June 2026)
Device reports in the latest closed quarter923,529 (April to June 2026)
Device data run through30 Sep 2026

Search engines list 2,886 pages of drugs, devices, device types, drug classes, manufacturers, reaction terms and months in this edition.

Updates in this month

  • 18 Oct 2026: FDA changed counts for April to June 2026 in a later export.
  • 11 Oct 2026: FDA changed counts for April to June 2026 in a later export. 1 drug page has a different count.

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 October 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 October 2026
RowNameFigure
1Off label use79,953
2Drug ineffective71,499
3Product dose omission issue48,930
4Nausea48,716
5Death48,702
6Fatigue45,513
7Diarrhoea43,937
8Pruritus35,233
9Headache34,426
10Dyspnoea30,572

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 October 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 October 2026
RowNameFigure
12026673,772 (to June 2026)
220251,307,769
320241,319,106
420231,368,572
520221,523,664
620211,566,148
720201,455,117
820191,434,195
920181,428,121
1020171,251,778

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: 1,093,138 reports.

The rows are the first 10 rows of the first table of the finding in the edition of October 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 October 2026
RowNameFigure
1Clinical Chemistry1,093,138
2Dental753,445
3Unknown499,935
4General Hospital274,006
5Gastroenterology, Urology230,656
6Anesthesiology170,461
7General, Plastic Surgery119,389
8Cardiovascular112,780
9Orthopedic74,011
10Neurology18,479

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 October 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 October 2026
RowNameFigure
1Consumer or non-health professional9,459,184
2Physician4,526,008
3Other health professional4,076,160
4Pharmacist1,300,396
5Lawyer544,333
6Not given740,442

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.