Reports received by FDA, by month

August 2023: adverse event reports received by FDA

118,671 drug reports (FAERS) and 235,962 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.

118,671
drug reports received: 123,821 a year earlier; 120,189
monthly average, preceding 12 months: -1.3% against the average; 235,962
device reports received: 195,648 a year earlier

FDA received 118,671 drug adverse event reports in August 2023, against 123,821 in the same month a year earlier and a monthly average of 120,189 over the preceding 12 months. The MAUDE device database received 235,962 reports that month (195,648 a year earlier).

The drugs listed most often as suspect products were Dupixent (5,854), Percocet (5,282) and Acetaminophen Hydrocodone Bitartrate (3,703), and the reactions recorded most often were drug ineffective (9,140), dependence (8,025) and off label use (7,118).

Relative to their own average over the preceding 12 months, the drugs whose report count rose most were Endocet (181.5× its average), Acetaminophen Hydrocodone Bitartrate (170.9× its average) and Opana (126.2× 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 August 2023

Drugs listed most often as suspect products

Drug	Reports	Share of the month
Dupixent	5,854	4.9%
Percocet	5,282	4.5%
Acetaminophen Hydrocodone Bitartrate	3,703	3.1%
Acetaminophen Oxycodone Hydrochloride	3,606	3%
Methotrexate	2,313	1.9%
Endocet	2,239	1.9%
Mounjaro	2,176	1.8%
Humira	1,968	1.7%
Repatha	1,906	1.6%
Cosentyx	1,622	1.4%
Revlimid	1,473	1.2%
Entresto	1,457	1.2%
Rituximab	1,393	1.2%
Prednisone	1,392	1.2%
Morphine sulfate	1,358	1.1%

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
Endocet	2,239	181.5×
Acetaminophen Hydrocodone Bitartrate	3,703	170.9×
Opana	1,336	126.2×
Percocet	5,282	123.1×
Acetaminophen and codeine	829	46.5×
Belbuca	362	24.4×
Fentanyl citrate	1,070	20.9×
Orserdu	861	17.4×

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
Drug ineffectivethe medicine did not work as expected	9,140	7.7%
Dependence	8,025	6.8%
Off label useused for a purpose or in a way not on the label	7,118	6%
Ill-defined disordera condition that was not clearly described	6,431	5.4%
Deaththe patient died; cause not stated by this term	5,767	4.9%
Fatiguetiredness	4,561	3.8%
Nauseafeeling sick	4,011	3.4%
Product dose omission issuea dose was missed	3,676	3.1%
Diarrhoealoose or frequent stools	3,588	3%
Overdosea dose above the recommended amount	3,135	2.6%
Headachehead pain	2,954	2.5%
Painpain, site not specified	2,937	2.5%
Dyspnoeashortness of breath	2,866	2.4%
Rashskin rash	2,485	2.1%
Arthralgiajoint pain	2,479	2.1%

Devices named most often

Brand	Reports	Share of device reports
Dexcom G6 Continuous Glucose Monitoring System	20,414	8.7%
Alaris System	17,800	7.5%
t:slim X2 Insulin Pump with Control-IQ Technology	15,950	6.8%
Dexcom G7 Continuous Glucose Monitoring System	5,599	2.4%
Permanent Pacemaker Electrode	3,810	1.6%
Drug Eluting Permanent Right Ventricular Rv Or Right Atrial Ra Pacemaker Ele	3,252	1.4%
MiniMed 770G US System BLE Connect 3.0 mg/dL	3,060	1.3%
Implantable Cardioverter Defibrillator Non-Crt	2,496	1.1%
Coolsculpting System	2,463	1%
Libre 2 Sensor FreeStyle	2,023	0.9%

Questions about August 2023

How many adverse event reports did FDA receive in August 2023?

118,671 drug reports are in the openFDA FAERS release of 28 Sep 2026, and 235,962 device reports in the MAUDE release of 28 Sep 2026. The same month a year earlier has 123,821 drug reports.

Which drugs were listed most often?

Dupixent (5,854), Percocet (5,282), Acetaminophen Hydrocodone Bitartrate (3,703), Acetaminophen Oxycodone Hydrochloride (3,606) and Methotrexate (2,313).

Which reactions were recorded most often?

drug ineffective (9,140), dependence (8,025), off label use (7,118), ill-defined disorder (6,431) and death (5,767).

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.