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Insulin Glargine side effects: what 245,215 FDA adverse event reports show

Insulin Glargine · Toujeo · 1,183 reaction terms · 728,189 drug–reaction co-reports · data 2026-09-14
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Drug class

Insulin Analog

FDA label (Established Pharmacologic Class) · compare the class

Brand names

Toujeo

openFDA label

Who reports

245,215 reports · 52% serious · 13,511 with death outcome · 55% female

openFDA FAERS counts, all years, deduplication not applied

Used for

TOUJEO is indicated to improve glycemic control in adults and pediatric patients 6 years of age and older with diabetes mellitus. TOUJEO is a long-acting human insulin analog indicated to improve glycemic control in adults and pediatric patients 6 years and older with diabetes mellitus. ( 1 ) Limitations of Use : Not recommended for the treatment of diabetic ketoacidosis.

FDA label, Indications and Usage

What it is

Insulin glargine is a long-acting human insulin analog produced by recombinant DNA technology utilizing a nonpathogenic laboratory strain of Escherichia coli (K12) as the production organism. .

FDA label, Description section

Boxed warning

None in the current label

How to read this page. FAERS is a spontaneous-reporting system: counts are not incidence rates and a signal is not proof of causation. Each reaction below is run through an automated screen — is the term in the FDA label (known), in the indications (the disease being treated), an administrative/coding term, or none of these (unlabeled)? That screen is mechanical text matching, not a causality assessment. The 30 hand-written Bradford Hill assessments are on the causality assessment page. Not medical advice.

Causality screen of the 40 strongest signals

Labeled adverse reaction 5Labeled (related wording) 6Likely indication confounding 2Reporting / coding artifact 4Lab value / disease marker 7Not in label — unassessed 16
What the badges mean

Strongest disproportionality signals

Flagged terms (PRR ≥ 2, χ² ≥ 4, n ≥ 10), ranked by PRR; infinite PRRs (no comparator reports) excluded. The EBGM column is a second, shrinkage-based estimate (MGPS) with its 5th percentile EB05 and the BCPNN IC025; a pair flagged by PRR alone is marked PRR-only and should be read as fragile. The strata column recomputes the PRR on serious reports only (and, for the 300 most-reported drugs, adjusted for age band), and flags pairs whose reports are unusually skewed by sex or come mostly from consumers. Each row also shows the PRR against the other drugs of the same FDA class, which removes most confounding by the condition being treated, and a calibrated p-value: on validation, known non-causes average an ROR of about 2, so significance is judged against that empirical null (✓ = p < 0.05 after calibration). 1,143 further terms are in the interactive explorer. Reaction links open the term's cross-drug page.

Show:
ReactionReportsPRR 95% CI · ROR · χ²/pEBGM EB05 · IC025Label screenSerious-only & strataTrial cross-check
Device operational issue1,99076.1
71.6–80.9ROR 76.7 · calibrated p 8e-7 ✓
40.3 EB05 38.8 · IC025 +5.2
3/3 methods agree
vs other Insulin Analogs: PRR 155.4 (136.7–176.7)
Reporting / coding artifactserious n=290 · 83% consumernot reported in cached trials
Pulmonary vasculitis18947.3
39.6–56.6ROR 47.4 · calibrated p 2e-5 ✓
30.5 EB05 27.0 · IC025 +4.6
3/3 methods agree
vs other Insulin Analogs: PRR 11.6 (9.7–13.9)
Not in label — unassessedserious n=189 · ♀ 0% (drug 55%)not reported in cached trials
Hypoglycaemia unawareness12344.2
35.5–55.0ROR 44.2 · calibrated p 4e-5 ✓
29.1 EB05 25.0 · IC025 +4.4
3/3 methods agree
vs other Insulin Analogs: PRR 14.9 (11.8–18.8)
Labeled adverse reaction
exact term
serious n=113not reported in cached trials
Product storage issue61143.6
39.6–48.1ROR 43.7 · calibrated p 3e-5 ✓
29.0 EB05 27.1 · IC025 +4.7
3/3 methods agree
vs other Insulin Analogs: PRR 159.7 (126.2–202.0)
Reporting / coding artifact100% consumernot reported in cached trials
Neurologic neglect syndrome18140.6
34.0–48.5ROR 40.6 · calibrated p 5e-5 ✓
27.5 EB05 24.3 · IC025 +4.4
3/3 methods agree
vs other Insulin Analogs: PRR 20.6 (16.8–25.3)
Not in label — unassessedserious n=181 · ♀ 100% (drug 55%) · 100% cliniciannot reported in cached trials
Total lung capacity abnormal11235.4
28.4–44.1ROR 35.4 · calibrated p 1e-4 ✓
25.0 EB05 21.4 · IC025 +4.2
3/3 methods agree
vs other Insulin Analogs: PRR 10.9 (8.7–13.7)
Not in label — unassessedserious n=112 · ♀ 0% (drug 55%) · 100% cliniciannot reported in cached trials
Diabetic hyperglycaemic coma9635.0
27.5–44.4ROR 35.0 · calibrated p 1e-4 ✓
24.8 EB05 20.9 · IC025 +4.1
3/3 methods agree
vs other Insulin Analogs: PRR 108.7 (65.7–179.8)
Likely indication confounding
shares a disease stem with the indications wording
serious n=96 · ♀ 100% (drug 55%) · 100% consumernot reported in cached trials
Hypoglycaemic unconsciousness56834.0
30.8–37.5ROR 34.0 · calibrated p 1e-4 ✓
24.4 EB05 22.8 · IC025 +4.4
3/3 methods agree
vs other Insulin Analogs: PRR 11.0 (10.0–12.2)
Not in label — unassessedserious n=567 · 74% consumerNCT00069784: 21/6,231 (0.3%) on Insulin Glargine (serious AE)
Hypoglycaemic seizure23028.5
24.6–33.1ROR 28.6 · calibrated p 4e-4 ✓
21.5 EB05 19.3 · IC025 +4.1
3/3 methods agree
vs other Insulin Analogs: PRR 12.9 (11.0–15.2)
Not in label — unassessedserious n=230NCT00069784: 7/6,231 (0.1%) on Insulin Glargine (serious AE)
Shock hypoglycaemic11627.3
22.2–33.7ROR 27.3 · calibrated p 5e-4 ✓
20.8 EB05 17.8 · IC025 +4.0
3/3 methods agree
vs other Insulin Analogs: PRR 16.4 (12.9–21.0)
Not in label — unassessedserious n=115 · 100% consumerNCT00069784: 1/6,273 (0.0%) on Insulin Glargine (serious AE)
Blood glucose fluctuation2,67527.3
26.1–28.5ROR 27.6 · calibrated p 4e-4 ✓
20.8 EB05 20.1 · IC025 +4.3
3/3 methods agree
vs other Insulin Analogs: PRR 14.5 (13.8–15.2)
Lab value / disease markerserious n=1,406 · 82% consumernot reported in cached trials
Diabetic retinopathy82327.1
25.1–29.3ROR 27.2 · calibrated p 4e-4 ✓
20.7 EB05 19.5 · IC025 +4.2
3/3 methods agree
vs other Insulin Analogs: PRR 12.1 (11.1–13.1)
Labeled adverse reaction
exact term
serious n=708 · 74% consumerNCT00069784: 1/6,273 (0.0%) on Insulin Glargine (serious AE)
Carotid artery thrombosis19124.4
20.8–28.7ROR 24.4 · calibrated p 8e-4 ✓
19.1 EB05 16.9 · IC025 +4.0
3/3 methods agree
vs other Insulin Analogs: PRR 21.0 (17.2–25.7)
Not in label — unassessedserious n=191 · ♀ 100% (drug 55%) · 100% cliniciannot reported in cached trials
Product dispensing issue79224.1
22.3–26.1ROR 24.2 · calibrated p 8e-4 ✓
18.9 EB05 17.8 · IC025 +4.1
3/3 methods agree
vs other Insulin Analogs: PRR 672.7 (448.2–1,009.4)
Reporting / coding artifact92% consumernot reported in cached trials
Blood glucose abnormal3,98423.2
22.4–24.1ROR 23.6 · calibrated p 9e-4 ✓
18.4 EB05 17.9 · IC025 +4.1
3/3 methods agree
vs other Insulin Analogs: PRR 17.1 (16.4–17.8)
Lab value / disease markerserious PRR 16.8 · 82% consumernot reported in cached trials
Hypoglycaemic coma61122.7
20.8–24.8ROR 22.8 · calibrated p 0.001 ✓
18.0 EB05 16.9 · IC025 +4.0
3/3 methods agree
vs other Insulin Analogs: PRR 15.2 (13.7–16.9)
Not in label — unassessedserious n=611NCT00069784: 18/6,231 (0.3%) on Insulin Glargine (serious AE)
Glycosylated haemoglobin increased4,90320.5
19.9–21.1ROR 20.9 · calibrated p 0.002 ✓
16.6 EB05 16.3 · IC025 +4.0
3/3 methods agree
vs other Insulin Analogs: PRR 16.1 (15.5–16.6)
Lab value / disease markerserious PRR 19.0 · 81% consumernot reported in cached trials
Spirometry abnormal11119.7
16.0–24.3ROR 19.7 · calibrated p 0.002 ✓
16.1 EB05 13.7 · IC025 +3.6
3/3 methods agree
vs other Insulin Analogs: PRR 12.7 (10.0–16.1)
Lab value / disease markerserious n=111 · ♀ 0% (drug 55%) · 100% cliniciannot reported in cached trials
Neuropathic arthropathy11017.5
14.2–21.5ROR 17.5 · calibrated p 0.004 ✓
14.6 EB05 12.4 · IC025 +3.5
3/3 methods agree
vs other Insulin Analogs: PRR 16.7 (13.0–21.5)
Not in label — unassessedserious n=104 · 100% consumernot reported in cached trials
Mite allergy10717.1
13.9–21.0ROR 17.1 · calibrated p 0.004 ✓
14.3 EB05 12.1 · IC025 +3.4
3/3 methods agree
vs other Insulin Analogs: PRR 12.7 (10.0–16.1)
Not in label — unassessedserious n=107 · ♀ 0% (drug 55%) · 100% cliniciannot reported in cached trials
Hypoglycaemia (low blood sugar)7,97316.6
16.3–17.0ROR 17.2 · calibrated p 0.004 ✓
14.0 EB05 13.8 · IC025 +3.8
3/3 methods agree
vs other Insulin Analogs: PRR 15.0 (14.6–15.4)
Labeled adverse reaction
exact term
age-adj. PRR 13.9 · serious PRR 15.5NCT00069784: 36/6,231 (0.6%) on Insulin Glargine (serious AE)
Insulin resistance33616.6
14.8–18.7ROR 16.6 · calibrated p 0.005 ✓
14.0 EB05 12.8 · IC025 +3.6
3/3 methods agree
vs other Insulin Analogs: PRR 8.0 (7.1–9.1)
Reporting / coding artifactserious n=203 · 72% consumernot reported in cached trials
Accidental underdose2,08514.1
13.5–14.8ROR 14.3 · calibrated p 0.009 ✓
12.2 EB05 11.8 · IC025 +3.5
3/3 methods agree
vs other Insulin Analogs: PRR 17.9 (16.9–18.9)
Not in label — unassessedserious n=174 · 95% consumernot reported in cached trials
Glycosylated haemoglobin abnormal16914.1
12.0–16.6ROR 14.1 · calibrated p 0.009 ✓
12.1 EB05 10.7 · IC025 +3.3
3/3 methods agree
vs other Insulin Analogs: PRR 32.5 (25.5–41.4)
Lab value / disease marker77% consumernot reported in cached trials
Antineutrophil cytoplasmic antibody positive9813.2
10.6–16.3ROR 13.2 · calibrated p 0.013 ✓
11.4 EB05 9.5 · IC025 +3.1
3/3 methods agree
vs other Insulin Analogs: PRR 12.0 (9.3–15.3)
Lab value / disease markerserious n=98 · ♀ 0% (drug 55%) · 100% cliniciannot reported in cached trials
Mycotic allergy11112.8
10.5–15.7ROR 12.8 · calibrated p 0.014 ✓
11.1 EB05 9.4 · IC025 +3.1
3/3 methods agree
vs other Insulin Analogs: PRR 13.2 (10.4–16.7)
Not in label — unassessedserious n=109 · ♀ 0% (drug 55%) · 100% cliniciannot reported in cached trials
Hyperglycaemia (high blood sugar)4,71412.6
12.2–13.0ROR 12.9 · calibrated p 0.013 ✓
11.1 EB05 10.8 · IC025 +3.4
3/3 methods agree
vs other Insulin Analogs: PRR 16.1 (15.6–16.7)
Labeled adverse reaction
exact term
age-adj. PRR 12.3 · serious PRR 12.6NCT00069784: 2/6,231 (0.0%) on Insulin Glargine (serious AE)
Neuritis19812.5
10.8–14.5ROR 12.5 · calibrated p 0.015 ✓
10.9 EB05 9.7 · IC025 +3.2
3/3 methods agree
vs other Insulin Analogs: PRR 12.8 (10.7–15.3)
Not in label — unassessedserious n=195 · ♀ 0% (drug 55%)not reported in cached trials
Diabetic neuropathy63912.5
11.5–13.5ROR 12.5 · calibrated p 0.015 ✓
10.9 EB05 10.3 · IC025 +3.3
3/3 methods agree
vs other Insulin Analogs: PRR 11.3 (10.3–12.5)
Labeled adverse reaction
exact term
serious n=537NCT00069784: 2/6,273 (0.0%) on Insulin Glargine (serious AE)
Chronic kidney disease-mineral and bone disorder13512.1
10.1–14.5ROR 12.1 · calibrated p 0.017 ✓
10.6 EB05 9.2 · IC025 +3.1
3/3 methods agree
vs other Insulin Analogs: PRR 14.8 (11.9–18.5)
Not in label — unassessedserious n=135not reported in cached trials
Glycosylated haemoglobin decreased19311.7
10.0–13.6ROR 11.7 · calibrated p 0.019 ✓
10.3 EB05 9.1 · IC025 +3.1
3/3 methods agree
vs other Insulin Analogs: PRR 23.0 (18.7–28.3)
Lab value / disease marker100% consumernot reported in cached trials
Drug administered in wrong device11611.6
9.6–14.1ROR 11.6 · calibrated p 0.020 ✓
10.2 EB05 8.7 · IC025 +3.0
3/3 methods agree
vs other Insulin Analogs: only this drug
Not in label — unassessed100% consumernot reported in cached trials
Diabetic foot35711.2
10.0–12.5ROR 11.2 · calibrated p 0.022 ✓
9.9 EB05 9.1 · IC025 +3.1
3/3 methods agree
vs other Insulin Analogs: PRR 13.3 (11.6–15.1)
Likely indication confounding
shares a disease stem with the indications wording
serious n=341NCT00069784: 1/6,273 (0.0%) on Insulin Glargine (serious AE)
Dust allergy10910.8
8.8–13.2ROR 10.8 · calibrated p 0.026 ✓
9.5 EB05 8.0 · IC025 +2.9
3/3 methods agree
vs other Insulin Analogs: PRR 12.8 (10.1–16.2)
Not in label — unassessedserious n=109 · ♀ 0% (drug 55%) · 100% cliniciannot reported in cached trials

Clinical concept groups

MedDRA splits one clinical problem across several terms (e.g. "neutropenia", "neutrophil count decreased", "agranulocytosis"), which dilutes term-level signals. These rows count reports with any term in a concept group (an exact union, not a sum), compared with all other drugs. Groups are hand-built and listed in the methods.

ConceptReportsPRR 95% CIReading
Hypoglycaemia18,15519.819.5–20.1signal
Hyperglycaemia / diabetes47,31213.413.3–13.5signal
Kidney injury10,3712.01.9–2.0raised
Stroke5,4541.91.8–1.9raised
Pancreatitis1,7611.91.8–2.0raised
Heart failure3,4491.71.6–1.7raised
Myocardial infarction3,8751.61.6–1.7raised
Fall / fracture6,5621.51.4–1.5raised
Serious infection9,9831.11.1–1.1raised
Gi bleeding2,2961.11.0–1.1raised
Hyponatraemia9831.01.0–1.1no difference
Anaemia3,6301.01.0–1.1raised
Arrhythmia / qt2,2841.01.0–1.1no difference
Rhabdomyolysis / myopathy9151.00.9–1.0no difference
Interstitial lung disease8820.80.7–0.8lower than other drugs
Venous thromboembolism1,9480.80.7–0.8lower than other drugs

Trial evidence (ClinicalTrials.gov)

✓ Trial adverse-event data found on ClinicalTrials.gov

Largest completed trials with posted results that list Insulin Glargine as a study intervention. The right-hand column of the signal table shows whether each FAERS term was also recorded in these trials, with a real denominator (9 of 40 signal terms matched).

Caveats: trial populations, doses and follow-up differ from the reporting population; AE terms are sponsor-coded and matched here by wording; absence from a trial list means the term was not reported above the sponsor's frequency threshold, not that it cannot occur.

Most frequently reported reactions

By raw co-report count, regardless of disproportionality. Common terms here are often the illness itself or generic outcomes.

ReactionReportsPRR 95% CI · ROR · χ²/pEBGM EB05 · IC025Label screenSerious-only & strataTrial cross-check
Off label use (used outside approved label)13,8831.4
1.4–1.4ROR 1.4 · calibrated p 0.573
1.4 EB05 1.3 · IC025 +0.4
vs other Insulin Analogs: PRR 33.2 (32.4–34.0)
Reporting / coding artifactage-adj. PRR 1.7 · serious PRR 0.8 · 75% consumernot reported in cached trials
Drug ineffective (drug did not work)10,6210.7
0.7–0.7ROR 0.7 · calibrated p 0.117
0.7 EB05 0.7 · IC025 -0.6
PRR-only: not supported by EBGM or IC
vs other Insulin Analogs: PRR 12.7 (12.5–13.0)
Reporting / coding artifactage-adj. PRR 0.8 · serious PRR 0.9 · 72% consumernot reported in cached trials
Inappropriate schedule of product administration10,2035.2
5.1–5.3ROR 5.4 · calibrated p 0.199
4.9 EB05 4.9 · IC025 +2.3
3/3 methods agree
vs other Insulin Analogs: PRR 75.9 (72.9–79.0)
Reporting / coding artifactage-adj. PRR 5.8 · serious PRR 2.5 · 86% consumernot reported in cached trials
Nausea9,9031.1
1.1–1.1ROR 1.1 · calibrated p 0.357
1.1 EB05 1.1 · IC025 +0.1
vs other Insulin Analogs: PRR 13.9 (13.6–14.2)
Not in label — unassessedage-adj. PRR 1.1 · serious PRR 1.3not reported in cached trials
Product storage error8,8869.7
9.5–9.9ROR 10.0 · calibrated p 0.032 ✓
8.8 EB05 8.6 · IC025 +3.1
3/3 methods agree
vs other Insulin Analogs: PRR 57.2 (55.0–59.4)
Reporting / coding artifactage-adj. PRR 15.0 · serious PRR 12.7 · 85% consumernot reported in cached trials
Visual impairment8,8106.5
6.4–6.7ROR 6.7 · calibrated p 0.110
6.1 EB05 6.0 · IC025 +2.6
3/3 methods agree
vs other Insulin Analogs: PRR 20.9 (20.4–21.5)
Not in label — unassessedage-adj. PRR 6.0 · serious PRR 4.3 · 92% consumerNCT00069784: 1/6,231 (0.0%) on Insulin Glargine (serious AE)
Hypoglycaemia (low blood sugar)7,97316.6
16.3–17.0ROR 17.2 · calibrated p 0.004 ✓
14.0 EB05 13.8 · IC025 +3.8
3/3 methods agree
vs other Insulin Analogs: PRR 15.0 (14.6–15.4)
Labeled adverse reaction
exact term
age-adj. PRR 13.9 · serious PRR 15.5NCT00069784: 36/6,231 (0.6%) on Insulin Glargine (serious AE)
Diarrhoea (diarrhea)7,2181.0
0.9–1.0ROR 1.0 · calibrated p 0.279
1.0 EB05 0.9 · IC025 -0.1
PRR-only: not supported by EBGM or IC
vs other Insulin Analogs: PRR 14.2 (13.8–14.6)
Not in label — unassessedage-adj. PRR 0.9 · serious PRR 1.2NCT00069784: 1/6,231 (0.0%) on Insulin Glargine (serious AE)
Fatigue (tiredness)6,9910.8
0.7–0.8ROR 0.8 · calibrated p 0.162
0.8 EB05 0.8 · IC025 -0.4
PRR-only: not supported by EBGM or IC
vs other Insulin Analogs: PRR 13.0 (12.7–13.4)
Not in label — unassessedage-adj. PRR 0.7 · serious PRR 1.0not reported in cached trials
Incorrect dose administered6,8092.6
2.6–2.7ROR 2.7 · calibrated p 0.738
2.6 EB05 2.5 · IC025 +1.3
3/3 methods agree
vs other Insulin Analogs: PRR 11.8 (11.5–12.1)
Reporting / coding artifactage-adj. PRR 1.8 · serious PRR 2.2 · 89% consumernot reported in cached trials
Malaise (feeling unwell)6,6651.3
1.3–1.3ROR 1.3 · calibrated p 0.514
1.3 EB05 1.3 · IC025 +0.3
vs other Insulin Analogs: PRR 15.0 (14.6–15.4)
Not in label — unassessedage-adj. PRR 1.2 · serious PRR 1.4not reported in cached trials

Unlabeled candidate signals

These flagged terms were not found in the FDA label text and do not match an artifact pattern. They are the pairs that would merit a structured assessment (temporality, dose-response, biological plausibility, consistency across databases, trial or cohort evidence). The screen has not done that; string-matching misses label wording, and a strong PRR can still be stimulated reporting, co-medication, or the disease itself.

✓ A hand-written Bradford Hill causality assessment exists for this drug: Insulin glargine ↔ Hypoglycaemia (blood glucose decreased).

Want to assess one of these properly? The runbook describes the Bradford Hill / trial-evidence workflow used on the assessment page, and handoff_top1000_signals.csv lists the strongest unassessed pairs across all drugs.

Common questions

What are the most reported side effects of Insulin Glargine?

In FDA FAERS, the most frequently co-reported reaction terms for Insulin Glargine are blood glucose increased, blood glucose decreased, nausea, visual impairment, hypoglycaemia, diarrhoea. These are report counts, not rates: FAERS has no denominator, reporting is voluntary and uneven, and a term can be reported because of the illness being treated rather than the drug.

Does Insulin Glargine have an FDA boxed warning?

No. The FDA label retrieved for Insulin Glargine has no boxed warning; see the label's Warnings and Precautions for the recognised risks.

Do FAERS signals prove that Insulin Glargine causes these side effects?

No. A disproportionality signal (PRR, ROR) means a reaction is reported more often with this drug than with others in the database. That can reflect a real effect, but also the disease being treated, stimulated reporting after news or litigation, co-medications, or how reports are coded. Causality needs temporality, dose-response, biological plausibility, consistency across data sources and, ideally, trial or cohort evidence. This page screens each term against the FDA label and ClinicalTrials.gov results; it does not establish causation.

Sources & methods

Page generated 2026-10-14. Label and PubChem text are retrieved automatically and may lag the current label; always check the current prescribing information. OpenPV is a beta research tool of the Open Source Medicine Foundation.