Reported Reactions

Drugs › Insulin analog

Brand name · Insulin aspart injection

Fiasp: adverse event reports filed with FDA

1,569 reports list it as a suspect or interacting product, 2017–2026. Class: Insulin analog.

1,569
reports as suspect product
0% of all reports · about 179 a year
245
reports, 12 months to June 2026
218 in the 12 months before
60.5%
marked serious by the reporter
42.7% across the class
6.4%
record death among outcomes, as reported
101 reports · not verified by FDA

1,569 adverse event reports received by FDA list the brand name Fiasp (insulin aspart injection) as a suspect or interacting product, from October 2017 to June 2026. A further 1,015 reports list it only as a concomitant medication, and those are not counted in the figures on this page.

In the 12 months to June 2026, 245 reports listed it, up 12% from 218 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 179 reports a year and 0% of the 20,646,523 reports in the database, and 0.5% of the reports for the insulin analog class. How many people take it is not in the data, so a count is not a rate of occurrence.

Reporters most often recorded blood glucose increased (24.3%), drug ineffective (11%) and wrong technique in product usage process (9.6%). A report can list several reactions, so shares add to more than 100%; 390 different terms appear across these reports. Blood glucose increased is recorded in 24.3% of these reports, about the same share as in the median insulin analog drug (23%).

60.5% of the reports are marked serious by the reporter (42.7% across the class); 6.4% record death among the outcomes and 23.3% record hospitalisation, as reported. 66.3% of the reports came from consumers, and the largest patient age group is 45 to 64 (14.8%). 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

04284Jul 2021: 13Aug 2021: 19Sep 2021: 13Oct 2021: 9Nov 2021: 84Dec 2021: 142022Jan 2022: 3Feb 2022: 9Mar 2022: 13Apr 2022: 3May 2022: 10Jun 2022: 5Jul 2022: 11Aug 2022: 12Sep 2022: 5Oct 2022: 8Nov 2022: 47Dec 2022: 72023Jan 2023: 11Feb 2023: 6Mar 2023: 8Apr 2023: 7May 2023: 10Jun 2023: 8Jul 2023: 15Aug 2023: 8Sep 2023: 10Oct 2023: 10Nov 2023: 23Dec 2023: 112024Jan 2024: 7Feb 2024: 9Mar 2024: 9Apr 2024: 11May 2024: 15Jun 2024: 18Jul 2024: 15Aug 2024: 18Sep 2024: 9Oct 2024: 13Nov 2024: 77Dec 2024: 102025Jan 2025: 14Feb 2025: 10Mar 2025: 15Apr 2025: 8May 2025: 12Jun 2025: 17Jul 2025: 18Aug 2025: 16Sep 2025: 8Oct 2025: 17Nov 2025: 76Dec 2025: 82026Jan 2026: 13Feb 2026: 15Mar 2026: 17Apr 2026: 31May 2026: 9Jun 2026: 17

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

01262522017: 820172018: 19720182019: 25220192020: 10520202021: 21520212022: 13320222023: 12720232024: 21120242025: 21920252026: 1022026

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Fiasp reports recording the termmedian drug in insulin analog

  1. Blood glucose increasedraised blood sugar reading24.3%382
  2. Drug ineffectivethe medicine did not work as expected11%173
  3. Wrong technique in product usage processthe product was used in the wrong way9.6%151
  4. Nauseafeeling sick6.8%107
  5. Vomitingbeing sick6.6%103
  6. Off label useused for a purpose or in a way not on the label6.5%102
  7. Product quality issuea problem with the product itself6.1%95
  8. Diabetic ketoacidosisa serious complication of diabetes with acid build-up5.7%90
  9. Blood glucose decreasedlow blood sugar reading5.4%85
  10. Condition aggravatedthe condition being treated got worse5.1%80
  11. General physical health deteriorationgeneral decline in health5%79
  12. Hyperglycaemiahigh blood sugar5%79
  13. Abdominal painstomach or belly pain5%78
  14. Sepsisa severe body-wide response to infection4.8%76
  15. Stressstress4.8%75
  16. Constipationconstipation4.7%74
  17. Hypoglycaemialow blood sugar4.7%74
  18. Diabetes mellitus inadequate controldiabetes not well controlled4.7%73
  19. Multiple organ dysfunction syndromeseveral organs failing4.6%72
  20. Hyponatraemialow blood sodium4.5%70
  21. Somnolencedrowsiness4.5%70
  22. Abdominal distensiona bloated abdomen4.2%66
  23. Ascitesfluid in the abdomen4.1%64
  24. Cardiogenic shockshock from the heart failing to pump4.1%64
  25. Dry mouthdry mouth4.1%64
  26. Appendicolith4%63
  27. Swellingswelling4%63
  28. Drug hypersensitivityan allergic-type reaction to a medicine3.7%58

Top 30 of 390 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 26 drugs in the insulin analog 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%101
Life-threatening5.2%81
Hospitalisation (initial or prolonged)23.3%366
Disability6.6%104
Congenital anomaly2.6%41
Other serious44.9%705
Not serious39.5%619

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 289,293 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 20.3%5
2 to 112.9%45
12 to 172.4%37
18 to 4414.6%229
45 to 6414.8%232
65 to 749.8%153
75 and over11.3%177
Age not given44%691

Patient sex

Female52.7%827
Male40.5%636
Not given6.8%106

Who reported

Physician16.4%257
Pharmacist4.3%68
Other health professional12.7%200
Lawyer0%0
Consumer or non-health professional66.3%1,041
Not given0.2%3

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 60.3% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Type 1 diabetes mellitus43928%
Diabetes mellitus23014.7%
Type 2 diabetes mellitus18812%
Latent autoimmune diabetes in adults40.3%
Gestational diabetes30.2%

The indication field is filled in by the reporter and is often blank; shares are of all 1,569 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Fiasp reports
Tresiba35622.7%
Gabapentin875.5%
Acetaminophen795%
Dextrose785%
Allopurinol754.8%
Aranesp754.8%
Phytonadione734.7%
Melatonin714.5%
Ipratropium bromide704.5%
Fragmin694.4%

Other products listed in reports where Fiasp 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

MeasureFiaspInsulin analogAll reports
Reports as suspect product1,569289,29320,646,523
Share of that pool—0.5%0%
Reports, latest 12 months245—1,332,454
Marked serious60.5%42.7%57.4%
Death recorded among outcomes, per 1,000 reports643591
Hospitalisation recorded, per 1,000 reports233186213
Consumer-filed share66.3%78.7%45.8%
Top term, share of reportsBlood glucose increased 24.3%median 23%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 insulin analog class

DrugName typeReportsLatest 12 monthsMarked serious
Humalogbrand71,1742,31234.4%
Lantus Solostarbrand45,7154,23024.6%
Lantusbrand39,1283,71863.8%
Insulin glarginegeneric27,9941,92342.8%
Toujeobrand15,4911,33224.7%
Novologbrand14,4771,57661.8%
Levemirbrand13,65267154.8%
Tresibabrand10,3731,26355.1%
Insulin lisprogeneric8,2091,11645.6%
Humalog Mix75/25brand8,13914023.8%
Insulingeneric8,13552288.9%
Apidrabrand3,6218669.2%
Insulin aspartgeneric3,23255388.6%
Sterile diluentgeneric3,22160019.4%
Humalog Kwikpenbrand3,04016927.5%

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 Fiasp reports

How many adverse event reports has FDA received for Fiasp?

1,569 reports list Fiasp as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 245 of them arrived in the latest 12 months. Another 1,015 list it only as a concomitant medication.

What reactions are recorded in Fiasp reports?

blood glucose increased (24.3%), drug ineffective (11%), wrong technique in product usage process (9.6%), nausea (6.8%) and vomiting (6.6%). 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 Fiasp was responsible.

How serious are the reports?

60.5% are marked serious by the reporter. Among the outcomes recorded, 6.4% of reports include death and 23.3% 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 (66.3%), physician (16.4%) and other health professional (12.7%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Fiasp rising?

245 reports in the 12 months to June 2026, up 12% from 218 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 Fiasp 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 Fiasp?

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 Fiasp as a suspect or interacting product; reports listing it only as a concomitant medication (1,015) 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.