Reported Reactions

Devices › Sensor, glucose, invasive, non-adjunctive, factory-calibrated, user-initiated

Device brand name · Data management system

FreeStyle LibreLink: medical device reports filed with FDA

8,145 reports name it, 2019–2026. Manufacturer given most often on reports: Abbott Diabetes Care. Product code PZE.

8,145
device reports naming the brand
0% of all MAUDE reports · about 1,137 a year
6,512
reports, 12 months to August 2026
218 in the 12 months before
86.3%
classified as malfunction
86.9% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

FDA's MAUDE database holds 8,145 reports that name the brand "FreeStyle LibreLink" (data management system), received between May 2019 and August 2026; the manufacturer given most often on reports is Abbott Diabetes Care. Spellings of one product vary from report to report.

6,512 reports arrived in the 12 months to August 2026, up 2887% from 218 in the 12 months before. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases. The event types recorded are malfunction (86.3%) and injury (13.7%); across all sensor, glucose, invasive, non-adjunctive, factory-calibrated, user-initiated reports (product code PZE) death is recorded in 0% and malfunction in 86.9%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are device alarm system (86.6%), application program problem (17.1%) and unable to obtain readings (3.2%). The patient problems coded most often are hypoglycemia, loss of consciousness and convulsion/seizure. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Reports by month, five years

03,2076,414Sep 2021: 2Oct 2021: 1Nov 2021: 8Dec 2021: 122022Jan 2022: 15Feb 2022: 10Mar 2022: 3Apr 2022: 3May 2022: 3Jun 2022: 8Jul 2022: 4Aug 2022: 2Sep 2022: 0Oct 2022: 4Nov 2022: 8Dec 2022: 192023Jan 2023: 26Feb 2023: 17Mar 2023: 21Apr 2023: 11May 2023: 10Jun 2023: 19Jul 2023: 51Aug 2023: 79Sep 2023: 32Oct 2023: 323Nov 2023: 223Dec 2023: 1492024Jan 2024: 44Feb 2024: 36Mar 2024: 64Apr 2024: 30May 2024: 27Jun 2024: 35Jul 2024: 54Aug 2024: 33Sep 2024: 28Oct 2024: 33Nov 2024: 42Dec 2024: 302025Jan 2025: 17Feb 2025: 12Mar 2025: 10Apr 2025: 7May 2025: 18Jun 2025: 3Jul 2025: 9Aug 2025: 9Sep 2025: 12Oct 2025: 9Nov 2025: 9Dec 2025: 22026Jan 2026: 7Feb 2026: 7Mar 2026: 12Apr 2026: 8May 2026: 10Jun 2026: 12Jul 2026: 10Aug 2026: 6,414

Reports by the month FDA received them. FDA releases MAUDE data monthly; reports can arrive months after an event, so the newest months grow in later releases.

By year received

03,2406,4802019: 420192020: 1120202021: 3720212022: 7920222023: 96120232024: 45620242025: 11720252026: 6,4802026

Event type and report source

Event type, as classified on the report

Death0%0
Injury13.7%1,118
Malfunction86.3%7,027
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%8,143
Voluntary report0%2
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 133,421 reports carrying product code PZE. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Device alarm system7,05586.6%5.6%
Application program problem1,39017.1%1.1%
Unable to obtain readings2573.2%2.9%
Device displays incorrect message901.1%3.1%
Computer software problema software problem310.4%0%
Application program version or upgrade problem120.1%0%
Communication or transmission problemthe device could not communicate or transmit50.1%0%
No device output50.1%0.1%
Application program freezes or fails to launch40%0%
Incorrect, inadequate or imprecise result or readings40%80.2%
No audible alarm40%0%
Compatibility problem30%0%
Data problem30%0%
Loss of data30%0%
Low readingsreadings were too low20%2.1%
Connection problema connection problem10%0%
Failure to interrogate10%0%

FDA's device problem codes as entered on the report; one report can carry several. Generic codes such as "no apparent adverse event" are left out.

Patient problems coded

Patient problem (FDA code)ReportsShare
Hypoglycemialow blood sugar83810.3%
Loss of consciousnesspassing out5697%
Convulsion/seizure1642%
Diaphoresis1581.9%
Dizzinesslight-headedness or unsteadiness1111.4%
Shaking/tremors1031.3%
Fatiguetiredness931.1%
Hyperglycemiahigh blood sugar650.8%
Confusion/ disorientation620.8%
Blurred vision220.3%
Headachehead pain220.3%
Vomitingbeing sick160.2%
Elevated ketones/ diabetic ketoacidosis130.2%
Nauseafeeling sick100.1%
Hot flashes/flushes90.1%

Patient problem codes are present mainly in reports filed since 2019 and are often blank.

In context

MeasureFreeStyle LibreLinkProduct code PZEAll MAUDE reports
Reports8,145133,42126,136,888
Share of that pool—6.1%0%
Classified as death, per 1,000 reports009
Classified as injury13.7%13.1%36.2%
Classified as malfunction86.3%86.9%62.3%
Filed by the manufacturer100%99.8%94.9%

Shares are of reports, not of devices in use. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data."

Other brands with product code PZE

BrandReportsLatest 12 monthsClassified as death
Libre Sensor Freestyle77,781120%
Freestyle Libre 14 Day25,86510,9760%
FreeStyle Libre Sensor 14 Day13,2961170%
FreeStyle Libre6,0451,5600%
FreeStyle Libre Sensor801110%
Libre 2 Sensor FreeStyle76,42030%
FreeStyle Libre App1561560%
FreeStyle Libre 2113,65867,2970%
Fs Opt-No Coding17000%
FreeStyle Libre 2 Plus49,66845,8390%
FreeStyle Libre 2 Sensor228523.1%
Libre 3 Sensor FreeStyle12,82920%
FreeStyle Libre 3 Plus91,34888,3230%
Freestyle9,490260.1%
Freestyle Freedom3,43060%

Ordered by report count for navigation only. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA also states that "common products may have a higher number of adverse events due to the higher total number of people using the product."

Questions about FreeStyle LibreLink reports

How many FDA reports name FreeStyle LibreLink?

8,145 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 6,512 in the latest 12 months.

What kinds of events are reported?

malfunction (86.3%) and injury (13.7%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

device alarm system (86.6%), application program problem (17.1%), unable to obtain readings (3.2%), device displays incorrect message (1.1%) and computer software problem (0.4%). These are FDA's device problem codes as entered on the report.

Who files these reports?

manufacturer reports (100%) and voluntary reports (0%). Manufacturers and user facilities are required to report; voluntary reports come from health professionals and the public.

Do these reports show that FreeStyle LibreLink was at fault?

No. FDA states that "MDR data alone cannot be used to establish rates of events, evaluate a change in event rates over time or compare event rates between devices. The number of reports cannot be interpreted or used in isolation to reach conclusions about the existence, severity, or frequency of problems associated with devices." It adds that the reporting system "has limitations, including the potential submission of incomplete, inaccurate, untimely, unverified, or biased data." FDA adds that "a causal relationship cannot be established between product and reactions listed in a report."

How do I report a problem with a medical device?

Through FDA MedWatch (Form FDA 3500 for health professionals and consumers), or to the manufacturer. See the guide on how to report.

Where this comes from. Counts are built from the openFDA Device Adverse Event (MAUDE) bulk export released 28 Sep 2026, which holds reports FDA received through 31 Aug 2026. Brand, generic and manufacturer names are as written on the reports; product code names come from FDA's device classification. A report counts here when any device it lists carries this brand name after punctuation and capitalisation are normalised. 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.