Reports received by FDA, by month

September 2010: adverse event reports received by FDA

41,794 drug reports (FAERS) and 24,708 device reports (MAUDE).

Read first · FDA's statement on these data

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. openFDA, FDA

FDA adds: "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 "cannot be used to estimate the incidence of these events."

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.

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

41,794
drug reports received: 31,075 a year earlier; 36,409
monthly average, preceding 12 months: 14.8% against the average; 24,708
device reports received: 18,087 a year earlier

FDA received 41,794 drug adverse event reports in September 2010, against 31,075 in the same month a year earlier and a monthly average of 36,409 over the preceding 12 months. The MAUDE device database received 24,708 reports that month (18,087 a year earlier).

The drugs listed most often as suspect products were Seroquel (4,402), Desvenlafaxine succinate (3,387) and Premarin (2,173), and the reactions recorded most often were breast cancer (2,410), nausea (1,837) and drug ineffective (1,620).

Relative to their own average over the preceding 12 months, the drugs whose report count rose most were Desvenlafaxine succinate (45.2× its average), Pantoprazole sodium (19.9× its average) and Effexor (19.6× its average). A jump in one month usually reflects a batch of reports from a manufacturer, a publicised event or a new product, not a change in what happens to patients.

Drug reports by month, three years to September 2010

Drugs listed most often as suspect products

Drug	Reports	Share of the month
Seroquel	4,402	10.5%
Desvenlafaxine succinate	3,387	8.1%
Premarin	2,173	5.2%
Lyrica	1,924	4.6%
Tysabri	1,671	4%
Prempro	1,645	3.9%
Avandia	1,353	3.2%
Provera	1,289	3.1%
Arimidex	675	1.6%
Avonex	588	1.4%
Effexor	555	1.3%
Chantix	535	1.3%
Dianeal	465	1.1%
Metoclopramide	411	1%
Advil Liqui-Gels	411	1%

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."

Largest rises against their own average

Drug	Reports this month	Times its 12-month average
Desvenlafaxine succinate	3,387	45.2×
Pantoprazole sodium	288	19.9×
Effexor	555	19.6×
Metoclopramide	411	11.3×
Dilantin-125	147	11.2×
Seroquel	4,402	8.9×
Torisel	119	6.5×
Arimidex	675	6×

Drugs with at least 50 reports in the month and an average of at least 10 a month over the preceding year. A rise usually reflects a batch of manufacturer reports, a publicised event or a new product.

Reactions recorded most often

MedDRA term	Reports	Share of the month
Breast cancerbreast cancer	2,410	5.8%
Nauseafeeling sick	1,837	4.4%
Drug ineffectivethe medicine did not work as expected	1,620	3.9%
Dizzinesslight-headedness or unsteadiness	1,534	3.7%
Fatiguetiredness	1,531	3.7%
Headachehead pain	1,428	3.4%
Insomniadifficulty sleeping	1,394	3.3%
Deaththe patient died; cause not stated by this term	1,170	2.8%
Diabetes mellitusdiabetes	1,095	2.6%
Myocardial infarctionheart attack	1,079	2.6%
Weight increasedweight gain	1,049	2.5%
Anxietyanxiety	1,049	2.5%
Dyspnoeashortness of breath	1,018	2.4%
Vomitingbeing sick	1,013	2.4%
Depressionlow mood	981	2.3%

Devices named most often

Brand	Reports	Share of device reports
Greenlight Addstat	548	2.2%
Ot Ultralink Meter	521	2.1%
Ot Ping Meter	444	1.8%
Starclose Se Vascular Closure System	392	1.6%
Inratio	209	0.8%
Patient Room Wall Saver Recl	200	0.8%
Accu-Chek Aviva Test Strips	190	0.8%
Automated Pd Set W/Cassette4 Prong	184	0.7%
Accu-Chek Spirit	177	0.7%
Precision?	168	0.7%

Questions about September 2010

How many adverse event reports did FDA receive in September 2010?

41,794 drug reports are in the openFDA FAERS release of 28 Sep 2026, and 24,708 device reports in the MAUDE release of 28 Sep 2026. The same month a year earlier has 31,075 drug reports.

Which drugs were listed most often?

Seroquel (4,402), Desvenlafaxine succinate (3,387), Premarin (2,173), Lyrica (1,924) and Tysabri (1,671).

Which reactions were recorded most often?

breast cancer (2,410), nausea (1,837), drug ineffective (1,620), dizziness (1,534) and fatigue (1,531).

Can the count for a month still change?

Yes. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Older months change little.

Does a busy month mean something happened that month?

Not by itself. The date is when FDA received the report, not when the event occurred, and volume follows manufacturer batches, product launches and publicity. 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."

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. 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.