Reported Reactions

Devices › Integrated continuous glucose monitoring system, factory calibrated, not for use with automated insulin delivery systems

Device brand name · Continuous glucose monitoring system

FreeStyle Libre Select: medical device reports filed with FDA

1,068 reports name it, 2025–2026. Manufacturer given most often on reports: Abbott Diabetes Care. Product code QLG.

1,068
device reports naming the brand
0% of all MAUDE reports · about 1,068 a year
1,063
reports, 12 months to August 2026
5 in the 12 months before
91.2%
classified as malfunction
80.3% across the product code
0%
classified as death, as reported
0 reports · not verified by FDA

1,068 medical device reports received by FDA name the brand "FreeStyle Libre Select" (continuous glucose monitoring system); the manufacturer given most often on reports is Abbott Diabetes Care; received from August 2025 to August 2026. Brand names are as the reporter or manufacturer wrote them, so one product can appear under several spellings.

1,063 reports arrived in the 12 months to August 2026, up 21160% from 5 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 (91.2%) and injury (8.8%); across all integrated continuous glucose monitoring system, factory calibrated, not for use with automated insulin delivery systems reports (product code QLG) death is recorded in 0% and malfunction in 80.3%. Event type is the reporter's classification of the report, not a verified outcome.

The device problems coded most often are incorrect, inadequate or imprecise result or readings (86.8%), low readings (4.6%) and high readings (2.4%). The patient problems coded most often are hypoglycemia, loss of consciousness and hyperglycemia. 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

0117234Sep 2021: 0Oct 2021: 0Nov 2021: 0Dec 2021: 02022Jan 2022: 0Feb 2022: 0Mar 2022: 0Apr 2022: 0May 2022: 0Jun 2022: 0Jul 2022: 0Aug 2022: 0Sep 2022: 0Oct 2022: 0Nov 2022: 0Dec 2022: 02023Jan 2023: 0Feb 2023: 0Mar 2023: 0Apr 2023: 0May 2023: 0Jun 2023: 0Jul 2023: 0Aug 2023: 0Sep 2023: 0Oct 2023: 0Nov 2023: 0Dec 2023: 02024Jan 2024: 0Feb 2024: 0Mar 2024: 0Apr 2024: 0May 2024: 0Jun 2024: 0Jul 2024: 0Aug 2024: 0Sep 2024: 0Oct 2024: 0Nov 2024: 0Dec 2024: 02025Jan 2025: 0Feb 2025: 0Mar 2025: 0Apr 2025: 0May 2025: 0Jun 2025: 0Jul 2025: 0Aug 2025: 5Sep 2025: 8Oct 2025: 10Nov 2025: 18Dec 2025: 292026Jan 2026: 52Feb 2026: 41Mar 2026: 55Apr 2026: 151May 2026: 99Jun 2026: 141Jul 2026: 234Aug 2026: 225

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.

Event type and report source

Event type, as classified on the report

Death0%0
Injury8.8%94
Malfunction91.2%974
Other0%0
Not given0%0

Who filed the report

Manufacturer report100%1,068
Voluntary report0%0
User facility report0%0
Distributor report0%0
Not given0%0

Grey bar: all 213,812 reports carrying product code QLG. Event type is the filer's classification and is not verified by FDA.

Device problems coded

Device problem (FDA code)ReportsShareShare across product code
Incorrect, inadequate or imprecise result or readings92786.8%73.8%
Low readingsreadings were too low494.6%2.9%
High readingsreadings were too high262.4%2.5%
Device alarm system222.1%5.7%
Device displays incorrect message201.9%8.4%
Unable to obtain readings191.8%8.6%
Detachment of device or device componentpart of the device came off60.6%2.1%
Failure to obtain sample10.1%0%
Unintended electrical shock10.1%0.1%

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 sugar413.8%
Loss of consciousnesspassing out181.7%
Hyperglycemiahigh blood sugar111%
Skin inflammation/ irritation111%
Erythemaskin redness90.8%
Painpain, site not specified90.8%
Fatiguetiredness80.7%
Convulsion/seizure70.7%
Diaphoresis70.7%
Dizzinesslight-headedness or unsteadiness70.7%
Shaking/tremors70.7%
Headachehead pain60.6%
Itching sensation60.6%
Skin infection60.6%
Swelling/ edema30.3%

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

In context

MeasureFreeStyle Libre SelectProduct code QLGAll MAUDE reports
Reports1,068213,81226,136,888
Share of that pool—0.5%0%
Classified as death, per 1,000 reports009
Classified as injury8.8%19.7%36.2%
Classified as malfunction91.2%80.3%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 QLG

BrandReportsLatest 12 monthsClassified as death
FreeStyle Libre 2113,65867,2970%
Libre 2 Sensor FreeStyle76,42030%
FreeStyle Libre 3120,677103,0450%
Libre 3 Sensor FreeStyle12,82920%
Instinct1,2151,1710%
FreeStyle Libre 3 Plus91,34888,3230%
FreeStyle Libre 2 Sensor228523.1%
FreeStyle Libre 2 Plus49,66845,8390%
FreeStyle Libre 3 Sensor273741.5%
Libre 2 Plus Sensor FreeStyle808100%
Fs Opt-No Coding17000%
FreeStyle LibreLink8,1456,5120%
Freestyle Libre 14 Day25,86510,9760%
Libre 3 Plus Sensor Freestyle585130%
FreeStyle Libre 2 Plus Sensor3,9292,7990%

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 Libre Select reports

How many FDA reports name FreeStyle Libre Select?

1,068 medical device reports in the openFDA MAUDE release of 28 Sep 2026, covering reports received through August 2026; 1,063 in the latest 12 months.

What kinds of events are reported?

malfunction (91.2%) and injury (8.8%). "Event type" is how the report was classified when filed: death, injury, malfunction or other.

What device problems are coded?

incorrect, inadequate or imprecise result or readings (86.8%), low readings (4.6%), high readings (2.4%), device alarm system (2.1%) and device displays incorrect message (1.9%). These are FDA's device problem codes as entered on the report.

Who files these reports?

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

Do these reports show that FreeStyle Libre Select 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.