Reported Reactions

Drugs › Penicillin-class antibacterial

Brand name · Amoxicillin and clavulanate potassium

Augmentin: adverse event reports filed with FDA

9,436 reports list it as a suspect or interacting product, 2004–2026. Class: Penicillin-class antibacterial. Also reported as Augmentin Xr, Augmentin /00756801/, Augmentin /02043401/.

9,436
reports as suspect product
0.1% of all reports · about 419 a year
412
reports, 12 months to June 2026
526 in the 12 months before
72.2%
marked serious by the reporter
81% across the class
6.4%
record death among outcomes, as reported
603 reports · not verified by FDA

Between January 2004 and June 2026, 9,436 adverse event reports received by FDA list the brand name Augmentin (amoxicillin and clavulanate potassium) as a suspect or interacting product. Reports that mention it only as a concomitant medication (13,688) are left out of every figure here.

In the 12 months to June 2026, 412 reports listed it, down 22% from 526 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 419 reports a year and 0.1% of the 20,646,523 reports in the database, and 14.7% of the reports for the penicillin-class antibacterial class. How many people take it is not in the data, so a count is not a rate of occurrence.

The reactions recorded most often are drug hypersensitivity (16.2%), diarrhoea (7.8%) and rash (4.9%). A report can list several reactions, so shares add to more than 100%; 1,141 different terms appear across these reports. Drug hypersensitivity is recorded in 16.2% of these reports, a larger share than in the median penicillin-class antibacterial drug (9%).

72.2% of the reports are marked serious by the reporter (81% across the class); 6.4% record death among the outcomes and 47% record hospitalisation, as reported. 38% of the reports came from physicians, and the largest patient age group is 45 to 64 (22.9%). 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

04079Jul 2021: 34Aug 2021: 40Sep 2021: 47Oct 2021: 24Nov 2021: 39Dec 2021: 222022Jan 2022: 36Feb 2022: 22Mar 2022: 29Apr 2022: 20May 2022: 37Jun 2022: 50Jul 2022: 30Aug 2022: 33Sep 2022: 53Oct 2022: 44Nov 2022: 47Dec 2022: 562023Jan 2023: 79Feb 2023: 54Mar 2023: 50Apr 2023: 32May 2023: 39Jun 2023: 50Jul 2023: 51Aug 2023: 51Sep 2023: 50Oct 2023: 31Nov 2023: 55Dec 2023: 432024Jan 2024: 42Feb 2024: 51Mar 2024: 52Apr 2024: 64May 2024: 60Jun 2024: 42Jul 2024: 34Aug 2024: 59Sep 2024: 39Oct 2024: 60Nov 2024: 71Dec 2024: 412025Jan 2025: 49Feb 2025: 45Mar 2025: 38Apr 2025: 41May 2025: 28Jun 2025: 21Jul 2025: 38Aug 2025: 29Sep 2025: 27Oct 2025: 25Nov 2025: 20Dec 2025: 512026Jan 2026: 38Feb 2026: 48Mar 2026: 45Apr 2026: 26May 2026: 33Jun 2026: 32

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

04809592004: 25120042005: 2662006: 1242007: 7620072008: 562009: 1822010: 21020102011: 1962012: 1412013: 43620132014: 5112015: 5572016: 62720162017: 6662018: 9122019: 95920192020: 5782021: 3972022: 45720222023: 5852024: 6152025: 41220252026: 222

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Augmentin reports recording the termmedian drug in penicillin-class antibacterial

  1. Drug hypersensitivityan allergic-type reaction to a medicine16.2%1,529
  2. Diarrhoealoose or frequent stools7.8%736
  3. Rashskin rash4.9%460
  4. Vomitingbeing sick4.4%412
  5. Nauseafeeling sick4.2%393
  6. Pruritusitching4.1%387
  7. Pyrexiafever3.7%346
  8. Rash maculo-papulara rash of flat and raised spots3.4%317
  9. Acute kidney injurysudden loss of kidney function3.2%298
  10. Drug reaction with eosinophilia and systemic symptomsDRESS, a severe reaction with rash, fever and organ involvement3%287
  11. Dyspnoeashortness of breath2.9%275
  12. Urticariahives2.9%272
  13. Erythemaskin redness2.8%260
  14. Drug ineffectivethe medicine did not work as expected2.6%250
  15. Drug interactionan interaction between medicines2.6%250
  16. Hypersensitivityan allergic-type reaction2.6%250
  17. Thrombocytopenialow platelets2.2%204
  18. Jaundiceyellowing of the skin or eyes2.1%195
  19. Fatiguetiredness2%192
  20. Hypotensionlow blood pressure1.9%183
  21. Condition aggravatedthe condition being treated got worse1.9%180
  22. Malaisegeneral feeling of being unwell1.9%180
  23. Astheniaweakness or lack of energy1.9%176
  24. Off label useused for a purpose or in a way not on the label1.8%168
  25. Dizzinesslight-headedness or unsteadiness1.8%166

Top 30 of 1,141 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 15 drugs in the penicillin-class antibacterial 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

Death6.4%603
Life-threatening7%659
Hospitalisation (initial or prolonged)47%4,438
Disability1.2%116
Congenital anomaly0.3%25
Other serious32.9%3,104
Not serious27.8%2,621

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 64,409 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 20.7%65
2 to 111.9%183
12 to 171.1%108
18 to 4413.4%1,267
45 to 6422.9%2,162
65 to 7413.9%1,315
75 and over19.7%1,862
Age not given26.2%2,474

Patient sex

Female54.1%5,107
Male37.4%3,533
Not given8.4%796

Who reported

Physician38%3,589
Pharmacist10.8%1,021
Other health professional22.7%2,140
Lawyer0.1%13
Consumer or non-health professional25.6%2,415
Not given2.7%258

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 36.7% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Infection4705%
Lung disorder4244.5%
Sinusitis3413.6%
Bronchitis2682.8%
Pneumonia2302.4%
Antibiotic prophylaxis1631.7%

The indication field is filled in by the reporter and is often blank; shares are of all 9,436 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Augmentin reports
Amoxicillin5125.4%
Paracetamol4795.1%
Pantoprazole4344.6%
Bactrim4254.5%
Furosemide4094.3%
Lovenox3924.2%
Acetaminophen3744%
Ibuprofen3403.6%
Kardegic3283.5%
Lyrica3223.4%

Other products listed in reports where Augmentin 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

MeasureAugmentinPenicillin-class antibacterialAll reports
Reports as suspect product9,43664,40920,646,523
Share of that pool—14.7%0.1%
Reports, latest 12 months412—1,332,454
Marked serious72.2%81%57.4%
Death recorded among outcomes, per 1,000 reports648291
Hospitalisation recorded, per 1,000 reports470406213
Consumer-filed share25.6%18.4%45.8%
Top term, share of reportsDrug hypersensitivity 16.2%median 9%0.9%

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 penicillin-class antibacterial class

DrugName typeReportsLatest 12 monthsMarked serious
Amoxicillingeneric31,9842,31183.8%
Piperacillin and tazobactamgeneric9,30758296.6%
Ampicillingeneric3,50520590%
Zosynbrand2,3595181%
Penicillin v potassiumgeneric1,2856336.3%
Penicillin ggeneric1,0457379%
Penicillin g sodiumgeneric1,0458025.6%
Bicillin L-Abrand89158111.6%
Unasynbrand7732290.9%
Ampicillin sodium, sulbactam sodiumgeneric5677792.9%
Ampicillin and sulbactamgeneric5622194.3%
Ampicillin sodiumgeneric558943.7%
Oxacillingeneric5572294.3%
Amoxilbrand535358.1%

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 Augmentin reports

How many adverse event reports has FDA received for Augmentin?

9,436 reports list Augmentin as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 412 of them arrived in the latest 12 months. Another 13,688 list it only as a concomitant medication.

What reactions are recorded in Augmentin reports?

drug hypersensitivity (16.2%), diarrhoea (7.8%), rash (4.9%), cholestasis (4.6%) and vomiting (4.4%). 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 Augmentin was responsible.

How serious are the reports?

72.2% are marked serious by the reporter. Among the outcomes recorded, 6.4% of reports include death and 47% 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?

physician (38%), consumer or non-health professional (25.6%) and other health professional (22.7%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Augmentin rising?

412 reports in the 12 months to June 2026, down 22% from 526 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 Augmentin 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 Augmentin?

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 Augmentin as a suspect or interacting product; reports listing it only as a concomitant medication (13,688) 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.