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Ezetimibe side effects: what 74,507 FDA adverse event reports show

Ezetimibe · 1,179 reaction terms · 280,456 drug–reaction co-reports · data 2026-09-14
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Drug class

Dietary Cholesterol Absorption Inhibitor

FDA label (Established Pharmacologic Class)

Who reports

74,507 reports · 65% serious · 4,305 with death outcome · 53% female

openFDA FAERS counts, all years, deduplication not applied

Used for

Ezetimibe Tablets is indicated: In combination with a statin, or alone when additional low-density lipoprotein cholesterol (LDL-C) lowering therapy is not possible, as an adjunct to diet to reduce elevated LDL-C in adults with primary hyperlipidemia, including heterozygous familial hypercholesterolemia (HeFH).

FDA label, Indications and Usage

What it is

Ezetimibe, USP is in a class of lipid-lowering compounds that selectively inhibits the intestinal absorption of cholesterol and related phytosterols.

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 2Likely indication confounding 7Lab value / disease marker 4Not in label — unassessed 27
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). 1,139 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
Amyloid arthropathy572,252.3
1,027.4–4,937.7ROR 2,254.0 · calibrated p 4e-17 ✓
228.4 EB05 182.8 · IC025 +5.9
3/3 methods agree
Not in label — unassessedserious n=57 · ♀ 100% (drug 53%) · 100% cliniciannot reported in cached trials
Hyper ige syndrome55262.3
181.4–379.3ROR 262.5 · calibrated p 1e-10 ✓
129.1 EB05 103.0 · IC025 +5.5
3/3 methods agree
Likely indication confounding
term in indications; also in warnings
serious n=55 · ♀ 100% (drug 53%)not reported in cached trials
Truncus arteriosus persistent71153.4
114.8–205.0ROR 153.6 · calibrated p 8e-9 ✓
96.5 EB05 79.1 · IC025 +5.5
3/3 methods agree
Not in label — unassessedserious n=71 · 100% cliniciannot reported in cached trials
Neurologic neglect syndrome171123.8
103.4–148.3ROR 124.1 · calibrated p 3e-8 ✓
85.0 EB05 74.9 · IC025 +5.9
3/3 methods agree
Not in label — unassessedserious n=171 · ♀ 100% (drug 53%) · 100% cliniciannot reported in cached trials
Type iia hyperlipidaemia65113.1
84.7–150.9ROR 113.2 · calibrated p 8e-8 ✓
78.8 EB05 64.0 · IC025 +5.2
3/3 methods agree
Likely indication confounding
shares a disease stem with the indications wording
serious n=63 · ♀ 0% (drug 53%) · 100% cliniciannot reported in cached trials
Amaurosis fugax23980.9
70.1–93.4ROR 81.2 · calibrated p 6e-7 ✓
62.5 EB05 56.2 · IC025 +5.6
3/3 methods agree
Not in label — unassessedserious n=239 · 93% cliniciannot reported in cached trials
Lipoprotein (a) increased6375.8
57.3–100.1ROR 75.8 · calibrated p 1e-6 ✓
58.7 EB05 47.5 · IC025 +4.9
3/3 methods agree
Likely indication confounding
term in indications
serious n=51 · ♀ 0% (drug 53%)not reported in cached trials
Carotid artery thrombosis17270.9
60.0–83.8ROR 71.1 · calibrated p 2e-6 ✓
56.3 EB05 49.6 · IC025 +5.4
3/3 methods agree
Not in label — unassessedserious n=172 · ♀ 100% (drug 53%) · 100% cliniciannot reported in cached trials
Low density lipoprotein abnormal7941.4
32.7–52.4ROR 41.4 · calibrated p 5e-5 ✓
35.8 EB05 29.7 · IC025 +4.5
3/3 methods agree
Likely indication confounding
term in indications
serious n=44not reported in cached trials
Adjustment disorder16640.9
34.8–48.2ROR 41.0 · calibrated p 5e-5 ✓
35.6 EB05 31.3 · IC025 +4.8
3/3 methods agree
Not in label — unassessedserious n=166 · ♀ 100% (drug 53%) · 100% cliniciannot reported in cached trials
Vascular stent stenosis4634.9
25.7–47.4ROR 34.9 · calibrated p 2e-4 ✓
30.7 EB05 24.0 · IC025 +4.1
3/3 methods agree
Not in label — unassessedserious n=46 · ♀ 0% (drug 53%) · 100% cliniciannot reported in cached trials
Cardiac septal defect5924.9
19.1–32.5ROR 24.9 · calibrated p 8e-4 ✓
22.8 EB05 18.3 · IC025 +3.8
3/3 methods agree
Not in label — unassessedserious n=59 · 100% cliniciannot reported in cached trials
Low density lipoprotein decreased11023.6
19.4–28.7ROR 23.6 · calibrated p 1e-3 ✓
21.7 EB05 18.5 · IC025 +4.0
3/3 methods agree
Likely indication confounding
term in indications
serious n=62 · ♀ 27% (drug 53%)not reported in cached trials
Congenital cardiovascular anomaly6322.5
17.4–29.0ROR 22.5 · calibrated p 0.001 ✓
20.7 EB05 16.8 · IC025 +3.8
3/3 methods agree
Not in label — unassessedserious n=63 · 100% cliniciannot reported in cached trials
Low density lipoprotein increased56922.4
20.6–24.4ROR 22.6 · calibrated p 0.001 ✓
20.8 EB05 19.4 · IC025 +4.2
3/3 methods agree
Likely indication confounding
term in indications
serious n=351not reported in cached trials
Restrictive pulmonary disease8221.2
16.9–26.5ROR 21.2 · calibrated p 0.002 ✓
19.7 EB05 16.3 · IC025 +3.8
3/3 methods agree
Not in label — unassessedserious n=81NCT00202878: 1/9,067 (0.0%) on Ezetimibe (serious AE)
Muscle discomfort5421.1
16.0–27.8ROR 21.1 · calibrated p 0.002 ✓
19.5 EB05 15.5 · IC025 +3.6
3/3 methods agree
Not in label — unassessed100% cliniciannot reported in cached trials
Personality disorder17720.2
17.3–23.5ROR 20.2 · calibrated p 0.002 ✓
18.8 EB05 16.6 · IC025 +3.9
3/3 methods agree
Not in label — unassessedserious n=174 · ♀ 100% (drug 53%) · 100% cliniciannot reported in cached trials
Diaphragmatic disorder5019.5
14.6–25.9ROR 19.5 · calibrated p 0.003 ✓
18.1 EB05 14.2 · IC025 +3.5
3/3 methods agree
Not in label — unassessedserious n=50 · ♀ 0% (drug 53%)NCT00202878: 1/9,077 (0.0%) on Ezetimibe (serious AE)
Necrotising myositis5217.9
13.5–23.7ROR 17.9 · calibrated p 0.004 ✓
16.8 EB05 13.2 · IC025 +3.4
3/3 methods agree
Not in label — unassessedserious n=52 · ♀ 0% (drug 53%) · 100% cliniciannot reported in cached trials
High density lipoprotein decreased17715.7
13.5–18.3ROR 15.7 · calibrated p 0.006 ✓
14.9 EB05 13.1 · IC025 +3.6
3/3 methods agree
Lab value / disease markerserious n=100not reported in cached trials
Urinary tract disorder22514.8
12.9–16.9ROR 14.8 · calibrated p 0.008 ✓
14.0 EB05 12.6 · IC025 +3.6
3/3 methods agree
Not in label — unassessedserious n=222 · 92% clinicianNCT00202878: 77/9,067 (0.8%) on Ezetimibe (serious AE)
Myopathy43114.7
13.3–16.2ROR 14.8 · calibrated p 0.008 ✓
14.0 EB05 12.9 · IC025 +3.6
3/3 methods agree
Labeled adverse reaction
exact term
serious PRR 10.5NCT00202878: 2/9,067 (0.0%) on Ezetimibe (serious AE)
Carotid arteriosclerosis4914.1
10.6–18.8ROR 14.1 · calibrated p 0.010 ✓
13.2 EB05 10.3 · IC025 +3.1
3/3 methods agree
Not in label — unassessedserious n=49 · ♀ 0% (drug 53%)not reported in cached trials
Hyperparathyroidism secondary11913.8
11.5–16.6ROR 13.9 · calibrated p 0.010 ✓
13.1 EB05 11.2 · IC025 +3.3
3/3 methods agree
Not in label — unassessedserious n=119NCT00202878: 2/9,067 (0.0%) on Ezetimibe (serious AE)
Pulmonary pain13213.5
11.3–16.1ROR 13.5 · calibrated p 0.011 ✓
12.9 EB05 11.1 · IC025 +3.3
3/3 methods agree
Not in label — unassessedserious n=129not reported in cached trials
Muscle cramp7912.9
10.3–16.1ROR 12.9 · calibrated p 0.014 ✓
12.2 EB05 10.0 · IC025 +3.2
3/3 methods agree
Not in label — unassessed100% cliniciannot reported in cached trials
Dyslipidaemia22112.7
11.1–14.6ROR 12.8 · calibrated p 0.014 ✓
12.2 EB05 10.9 · IC025 +3.4
3/3 methods agree
Labeled adverse reaction
exact term
serious n=215not reported in cached trials
Haemorrhagic stroke33512.5
11.2–13.9ROR 12.5 · calibrated p 0.014 ✓
12.0 EB05 10.9 · IC025 +3.4
3/3 methods agree
Not in label — unassessedserious PRR 10.6not reported in cached trials
Blood cholesterol decreased7611.9
9.5–15.0ROR 11.9 · calibrated p 0.018 ✓
11.3 EB05 9.2 · IC025 +3.0
3/3 methods agree
Likely indication confounding
term in indications
serious n=40 · ♀ 33% (drug 53%)not reported in cached trials
Blood pressure systolic abnormal9711.4
9.3–13.9ROR 11.4 · calibrated p 0.022 ✓
10.8 EB05 9.1 · IC025 +3.0
3/3 methods agree
Lab value / disease markerserious n=94 · ♀ 100% (drug 53%) · 100% cliniciannot reported in cached trials
Polycystic ovaries6011.1
8.6–14.4ROR 11.1 · calibrated p 0.024 ✓
10.5 EB05 8.3 · IC025 +2.9
3/3 methods agree
Not in label — unassessedserious n=60 · ♀ 100% (drug 53%)not reported in cached trials
Angina unstable24711.0
9.7–12.5ROR 11.0 · calibrated p 0.024 ✓
10.5 EB05 9.5 · IC025 +3.2
3/3 methods agree
Not in label — unassessedserious n=246 · ♀ 27% (drug 53%)not reported in cached trials
Nephrogenic anaemia17510.9
9.4–12.7ROR 10.9 · calibrated p 0.024 ✓
10.4 EB05 9.2 · IC025 +3.1
3/3 methods agree
Not in label — unassessedserious n=175not reported in cached trials
Immune-mediated myositis9510.5
8.5–12.9ROR 10.5 · calibrated p 0.029 ✓
9.9 EB05 8.3 · IC025 +2.9
3/3 methods agree
Not in label — unassessedserious n=94 · 100% cliniciannot reported in cached trials
Left atrial dilatation4510.2
7.6–13.7ROR 10.2 · calibrated p 0.034 ✓
9.4 EB05 7.2 · IC025 +2.7
3/3 methods agree
Not in label — unassessedserious n=45 · ♀ 0% (drug 53%) · 100% cliniciannot reported in cached trials
Blood creatine phosphokinase increased1,0019.9
9.3–10.6ROR 10.1 · calibrated p 0.032 ✓
9.6 EB05 9.1 · IC025 +3.2
3/3 methods agree
Lab value / disease markerage-adj. PRR 8.3 · serious PRR 7.1NCT00202878: 4/9,067 (0.0%) on Ezetimibe (serious AE)
Arterial occlusive disease2659.7
8.6–11.0ROR 9.8 · calibrated p 0.036 ✓
9.4 EB05 8.4 · IC025 +3.0
3/3 methods agree
Not in label — unassessedserious PRR 8.5 · ♀ 76% (drug 53%)NCT00202878: 1/9,067 (0.0%) on Ezetimibe (serious AE)
Gangrene1959.3
8.1–10.7ROR 9.3 · calibrated p 0.042 ✓
8.9 EB05 7.9 · IC025 +2.9
3/3 methods agree
Not in label — unassessedserious n=195 · ♀ 100% (drug 53%)NCT00202878: 1/9,077 (0.0%) on Ezetimibe (serious AE)
Myoglobin blood increased478.9
6.6–11.8ROR 8.9 · calibrated p 0.053
8.2 EB05 6.3 · IC025 +2.5
3/3 methods agree
Lab value / disease markerserious n=44 · ♀ 0% (drug 53%) · 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
Rhabdomyolysis / myopathy2,4298.78.3–9.0signal
Pancreatitis8503.02.8–3.2signal
Myocardial infarction2,0452.82.7–3.0signal
Kidney injury3,9192.42.4–2.5signal
Gi bleeding1,4962.32.2–2.4signal
Liver injury2,2222.12.0–2.2raised
Arrhythmia / qt1,3632.01.9–2.1raised
Stroke1,7512.01.9–2.1raised
Tendon disorder2631.91.7–2.2raised
Fall / fracture2,5881.91.8–2.0raised
Hypoglycaemia6441.91.8–2.0raised
Heart failure1,1721.81.7–2.0raised
Hyperglycaemia / diabetes2,2641.81.8–1.9raised
Hyponatraemia4501.61.4–1.7raised
Anaemia1,6101.51.4–1.6raised
Interstitial lung disease4891.41.3–1.6raised

Trial evidence (ClinicalTrials.gov)

✓ Trial adverse-event data found on ClinicalTrials.gov

Largest completed trials with posted results that list Ezetimibe 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 (8 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
Fatigue (tiredness)4,9811.8
1.8–1.9ROR 1.9 · calibrated p 0.869
1.8 EB05 1.8 · IC025 +0.8Labeled adverse reaction
exact term
age-adj. PRR 1.6 · serious PRR 2.0NCT00202878: 9/9,067 (0.1%) on Ezetimibe (serious AE)
Myalgia (muscle pain)4,4927.6
7.4–7.8ROR 8.0 · calibrated p 0.066
7.4 EB05 7.2 · IC025 +2.8
3/3 methods agree
Labeled adverse reaction
exact term
age-adj. PRR 6.2 · serious PRR 6.9NCT00202878: 1/9,067 (0.0%) on Ezetimibe (serious AE)
Nausea4,4501.6
1.5–1.6ROR 1.6 · calibrated p 0.724
1.6 EB05 1.5 · IC025 +0.6Labeled adverse reaction
exact term
age-adj. PRR 1.5 · serious PRR 1.8NCT00202878: 8/9,067 (0.1%) on Ezetimibe (serious AE)
Diarrhoea (diarrhea)3,9541.7
1.7–1.8ROR 1.8 · calibrated p 0.815
1.7 EB05 1.7 · IC025 +0.7Labeled adverse reaction
exact term
age-adj. PRR 1.4 · serious PRR 1.7NCT00202878: 23/9,067 (0.3%) on Ezetimibe (serious AE)
Drug ineffective (drug did not work)3,7100.8
0.8–0.8ROR 0.8 · calibrated p 0.173
0.8 EB05 0.8 · IC025 -0.4
PRR-only: not supported by EBGM or IC
Reporting / coding artifactage-adj. PRR 0.9 · serious PRR 1.1not reported in cached trials
Dizziness3,5852.0
2.0–2.1ROR 2.1 · calibrated p 0.990
2.0 EB05 2.0 · IC025 +1.0Labeled adverse reaction
exact term
age-adj. PRR 1.7 · serious PRR 2.2NCT00202878: 30/9,067 (0.3%) on Ezetimibe (serious AE)
Dyspnoea (shortness of breath)3,4691.7
1.7–1.8ROR 1.8 · calibrated p 0.809
1.7 EB05 1.7 · IC025 +0.7Not in label — unassessedage-adj. PRR 1.4 · serious PRR 1.7NCT00202878: 47/9,067 (0.5%) on Ezetimibe (serious AE)
Headache3,3851.5
1.5–1.6ROR 1.5 · calibrated p 0.673
1.5 EB05 1.5 · IC025 +0.5Labeled adverse reaction
exact term
age-adj. PRR 1.5 · serious PRR 1.8NCT00202878: 11/9,067 (0.1%) on Ezetimibe (serious AE)
Arthralgia (joint pain)3,0532.1
2.0–2.2ROR 2.1 · calibrated p 0.988
2.1 EB05 2.0 · IC025 +1.0
3/3 methods agree
Labeled adverse reaction
exact term
age-adj. PRR 1.7 · serious PRR 2.1NCT00202878: 25/9,067 (0.3%) on Ezetimibe (serious AE)
Asthenia (weakness)2,9372.2
2.1–2.3ROR 2.3 · calibrated p 0.924
2.2 EB05 2.1 · IC025 +1.1
3/3 methods agree
Not in label — unassessedage-adj. PRR 1.7 · serious PRR 2.1NCT00202878: 14/9,067 (0.2%) on Ezetimibe (serious AE)
Pain2,9041.3
1.3–1.4ROR 1.3 · calibrated p 0.537
1.3 EB05 1.3 · IC025 +0.3Labeled adverse reaction
exact term
age-adj. PRR 1.5 · serious PRR 1.3NCT00202878: 41/9,067 (0.5%) on Ezetimibe (serious AE)
Fall2,4512.1
2.0–2.2ROR 2.1 · calibrated p 0.993
2.1 EB05 2.0 · IC025 +1.0
3/3 methods agree
Not in label — unassessedage-adj. PRR 1.4 · serious PRR 2.0NCT00202878: 11/9,067 (0.1%) on Ezetimibe (serious AE)
Pain in extremity2,4482.3
2.3–2.4ROR 2.4 · calibrated p 0.861
2.3 EB05 2.3 · IC025 +1.2
3/3 methods agree
Labeled adverse reaction
exact term
age-adj. PRR 2.0 · serious PRR 2.4NCT00202878: 10/9,067 (0.1%) on Ezetimibe (serious AE)
Off label use (used outside approved label)2,4020.8
0.7–0.8ROR 0.8 · calibrated p 0.167
0.8 EB05 0.8 · IC025 -0.4
PRR-only: not supported by EBGM or IC
Reporting / coding artifactage-adj. PRR 0.7 · serious PRR 0.9not reported in cached trials
Vomiting2,3951.4
1.4–1.5ROR 1.5 · calibrated p 0.611
1.4 EB05 1.4 · IC025 +0.5Not in label — unassessedage-adj. PRR 1.4 · serious PRR 1.5NCT00202878: 1/9,067 (0.0%) on Ezetimibe (serious AE)

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.

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 Ezetimibe?

In FDA FAERS, the most frequently co-reported reaction terms for Ezetimibe are fatigue, myalgia, nausea, diarrhoea, dizziness, dyspnoea. 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 Ezetimibe have an FDA boxed warning?

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

Do FAERS signals prove that Ezetimibe 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.