Reported Reactions

Drugs › Opioid agonist

Brand name · Oxycodone and acetaminophen

Endocet: adverse event reports filed with FDA

9,991 reports list it as a suspect or interacting product, 2004–2026. Class: Opioid agonist.

9,991
reports as suspect product
0.1% of all reports · about 446 a year
146
reports, 12 months to June 2026
176 in the 12 months before
97.6%
marked serious by the reporter
91.7% across the class
12.5%
record death among outcomes, as reported
1,246 reports · not verified by FDA

Between February 2004 and June 2026, 9,991 adverse event reports received by FDA list the brand name Endocet (oxycodone and acetaminophen) as a suspect or interacting product. Reports that mention it only as a concomitant medication (1,501) are left out of every figure here.

In the 12 months to June 2026, 146 reports listed it, down 17% from 176 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 446 reports a year and 0.1% of the 20,646,523 reports in the database, and 1% of the reports for the opioid agonist class. How many people take it is not in the data, so a count is not a rate of occurrence.

The MedDRA terms listed most often are dependence (84.7%), overdose (37.4%) and ill-defined disorder (24.6%). A report can list several reactions, so shares add to more than 100%; 380 different terms appear across these reports. Dependence is recorded in 84.7% of these reports, a larger share than in the median opioid agonist drug (0.9%).

97.6% of the reports are marked serious by the reporter (91.7% across the class); 12.5% record death among the outcomes and 1.2% record hospitalisation, as reported. 94.1% of the reports came from consumers, and the largest patient age group is 45 to 64 (3.8%). 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

01,1202,239Jul 2021: 5Aug 2021: 12Sep 2021: 6Oct 2021: 2Nov 2021: 4Dec 2021: 352022Jan 2022: 21Feb 2022: 3Mar 2022: 10Apr 2022: 10May 2022: 24Jun 2022: 6Jul 2022: 2Aug 2022: 10Sep 2022: 7Oct 2022: 17Nov 2022: 2Dec 2022: 62023Jan 2023: 13Feb 2023: 7Mar 2023: 6Apr 2023: 6May 2023: 1Jun 2023: 49Jul 2023: 24Aug 2023: 2,239Sep 2023: 1,123Oct 2023: 2,038Nov 2023: 1,978Dec 2023: 8632024Jan 2024: 81Feb 2024: 22Mar 2024: 61Apr 2024: 272May 2024: 27Jun 2024: 38Jul 2024: 42Aug 2024: 25Sep 2024: 34Oct 2024: 8Nov 2024: 13Dec 2024: 92025Jan 2025: 24Feb 2025: 2Mar 2025: 2Apr 2025: 2May 2025: 2Jun 2025: 13Jul 2025: 13Aug 2025: 5Sep 2025: 7Oct 2025: 16Nov 2025: 8Dec 2025: 112026Jan 2026: 12Feb 2026: 15Mar 2026: 13Apr 2026: 18May 2026: 12Jun 2026: 16

Reports by the month FDA received them. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.

By year received

04,1748,3472004: 820042005: 32006: 62007: 420072008: 92009: 52010: 120102011: 12012: 22013: 12120132014: 212015: 472016: 3220162017: 32018: 142019: 3020192020: 1732021: 2232022: 11820222023: 8,3472024: 6322025: 10520252026: 86

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Endocet reports recording the termmedian drug in opioid agonist

  1. Dependence84.7%8,458
  2. Overdosea dose above the recommended amount37.4%3,732
  3. Ill-defined disordera condition that was not clearly described24.6%2,455
  4. Deaththe patient died; cause not stated by this term11.2%1,122
  5. Drug dependencedependence on a medicine4.1%407
  6. Drug ineffectivethe medicine did not work as expected4.1%405
  7. Sedationdrowsiness from a medicine3.7%370
  8. Hyperhidrosisexcessive sweating3.7%368
  9. Nauseafeeling sick3.6%358
  10. Nightmarenightmares3.6%357
  11. Depressionlow mood3.1%314
  12. Off label useused for a purpose or in a way not on the label3%298
  13. Nephrolithiasiskidney stones2.9%294
  14. Product use in unapproved indicationused for a purpose not on the label2.9%293
  15. Foetal exposure during pregnancythe unborn baby was exposed to the medicine2.6%260
  16. Anxietyanxiety2.3%227
  17. Painpain, site not specified1.5%153
  18. Drug withdrawal syndromesymptoms on stopping a medicine1.1%108
  19. Emotional distressemotional distress1%100
  20. Drug abusemisuse of a medicine0.7%70
  21. Constipationconstipation0.7%69
  22. Suicide attempta suicide attempt0.7%66
  23. Amnesiamemory loss0.7%65
  24. Maternal exposure during pregnancythe mother took the medicine during pregnancy0.6%60

Top 30 of 380 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 median share across the 42 drugs in the opioid agonist class; 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

Death12.5%1,246
Life-threatening0.2%15
Hospitalisation (initial or prolonged)1.2%122
Disability0.9%85
Congenital anomaly0.1%5
Other serious96%9,593
Not serious2.4%243

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 965,051 reports in the class. 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

Under 20%2
2 to 110%1
12 to 170%2
18 to 440.7%67
45 to 643.8%377
65 to 740.3%26
75 and over0.2%16
Age not given95.1%9,500

Patient sex

Female26.5%2,649
Male39.4%3,937
Not given34.1%3,405

Who reported

Physician0.9%92
Pharmacist0.2%19
Other health professional2.2%220
Lawyer2.4%241
Consumer or non-health professional94.1%9,400
Not given0.2%19

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 95.1% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Migraine3323.3%
Pain1891.9%
Back pain300.3%
Surgery80.1%
Breakthrough pain70.1%
Injury60.1%

The indication field is filled in by the reporter and is often blank; shares are of all 9,991 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Endocet reports
Percocet6,50265.1%
Acetaminophen Oxycodone Hydrochloride5,62056.3%
Acetaminophen Hydrocodone Bitartrate4,04940.5%
Tramadol hydrochloride2,81928.2%
Morphine sulfate2,65426.6%
Acetaminophen and codeine2,36323.7%
Opana2,03120.3%
Fentanyl citrate1,91919.2%
Opana Er1,74817.5%
Oxymorphone hydrochloride1,46814.7%

Other products listed in reports where Endocet is a suspect product, whatever their own role. Co-listing means the two were recorded together; it says nothing about either product's part in the event. Only the 2,500 most-reported names are counted here.

In context

MeasureEndocetOpioid agonistAll reports
Reports as suspect product9,991965,05120,646,523
Share of that pool—1%0.1%
Reports, latest 12 months146—1,332,454
Marked serious97.6%91.7%57.4%
Death recorded among outcomes, per 1,000 reports12535791
Hospitalisation recorded, per 1,000 reports12126213
Consumer-filed share94.1%32.5%45.8%
Top term, share of reportsDependence 84.7%median 0.9%0.3%

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."

Other drugs in the opioid agonist class

DrugName typeReportsLatest 12 monthsMarked serious
OxyContinbrand146,26358494.6%
Oxycodone hydrochloridegeneric113,2202,59894.7%
Dilaudidbrand64,19117395.7%
Morphine sulfategeneric60,0921,57779.8%
Hydrocodone bitartrate and acetaminophengeneric59,05217096.2%
Percocetbrand57,79319895.4%
Fentanylgeneric53,6563,29286.2%
MS Continbrand52,1285598.7%
Oxycodonegeneric35,6712,85391.8%
Hysingla ERbrand30,703692.1%
Morphinegeneric28,4211,42190.5%
Nucyntabrand27,57512790.4%
Tramadol hydrochloridegeneric27,4471,95292.4%
Oxycodone and acetaminophengeneric24,91911294%
Norcobrand24,6614293.1%

Ordered by report count for navigation only. 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." A brand and its generic are separate rows because reporters name them separately.

Questions about Endocet reports

How many adverse event reports has FDA received for Endocet?

9,991 reports list Endocet as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 146 of them arrived in the latest 12 months. Another 1,501 list it only as a concomitant medication.

What reactions are recorded in Endocet reports?

dependence (84.7%), overdose (37.4%), ill-defined disorder (24.6%), death (11.2%) and withdrawal syndrome (9.5%). 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 Endocet was responsible.

How serious are the reports?

97.6% are marked serious by the reporter. Among the outcomes recorded, 12.5% of reports include death and 1.2% 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?

consumer or non-health professional (94.1%), lawyer (2.4%) and other health professional (2.2%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Endocet rising?

146 reports in the 12 months to June 2026, down 17% from 176 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 Endocet 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 Endocet?

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 Endocet as a suspect or interacting product; reports listing it only as a concomitant medication (1,501) 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.