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Mometasone Furoate side effects: what 41,415 FDA adverse event reports show

Mometasone Furoate · Asmanex · 1,223 reaction terms · 215,537 drug–reaction co-reports · data 2026-09-14
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Drug class

Corticosteroid

FDA label, Indications wording

Brand names

Asmanex

openFDA label

Who reports

41,415 reports · 56% serious · 1,576 with death outcome · 66% female

openFDA FAERS counts, all years, deduplication not applied

Used for

ASMANEX ® TWISTHALER ® is indicated for the maintenance treatment of asthma as prophylactic therapy in adult and pediatric patients 4 years of age and older. Limitations of Use ASMANEX TWISTHALER is not indicated for the relief of acute bronchospasm. ASMANEX TWISTHALER is not indicated in children less than 4 years of age.

FDA label, Indications and Usage

What it is

Mometasone furoate, the active component of the ASMANEX TWISTHALER product, is a corticosteroid with the chemical name 9,21-dichloro-11(Beta),17-dihydroxy-16(alpha)-methylpregna-1,4-diene-3,20.

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 (related wording) 3Likely indication confounding 2Lab value / disease marker 4Not in label — unassessed 31
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). 1,183 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
Fractional exhaled nitric oxide increased1201,172.9
845.3–1,627.3ROR 1,176.3 · calibrated p 2e-17 ✓
331.9 EB05 285.0 · IC025 +6.9
3/3 methods agree
Not in label — unassessedserious n=120 · ♀ 0% (drug 66%)not reported in cached trials
Total lung capacity increased157692.6
543.9–881.8ROR 695.2 · calibrated p 4e-15 ✓
280.5 EB05 245.6 · IC025 +7.0
3/3 methods agree
Not in label — unassessedserious n=157 · ♀ 100% (drug 66%)not reported in cached trials
Ejection fraction256397.5
337.4–468.4ROR 400.0 · calibrated p 8e-13 ✓
218.0 EB05 196.5 · IC025 +7.1
3/3 methods agree
Not in label — unassessedserious n=256 · ♀ 100% (drug 66%)not reported in cached trials
Presbyacusis135391.2
312.4–490.0ROR 392.5 · calibrated p 1e-12 ✓
213.0 EB05 184.5 · IC025 +6.6
3/3 methods agree
Not in label — unassessedserious n=135 · ♀ 100% (drug 66%)not reported in cached trials
Heart sounds42387.7
259.1–580.2ROR 388.1 · calibrated p 5e-12 ✓
198.9 EB05 153.3 · IC025 +5.4
3/3 methods agree
Not in label — unassessedserious n=42 · ♀ 100% (drug 66%)not reported in cached trials
Rhinitis perennial32332.3
212.5–519.7ROR 332.6 · calibrated p 3e-11 ✓
178.6 EB05 132.5 · IC025 +5.0
3/3 methods agree
Not in label — unassessedserious n=31 · ♀ 0% (drug 66%) · 100% cliniciannot reported in cached trials
Sensitisation273281.7
243.0–326.7ROR 283.6 · calibrated p 2e-11 ✓
178.1 EB05 161.1 · IC025 +6.9
3/3 methods agree
Not in label — unassessedserious n=272 · ♀ 100% (drug 66%)not reported in cached trials
Asthma-chronic obstructive pulmonary disease overlap syndrome172250.7
208.8–301.0ROR 251.7 · calibrated p 7e-11 ✓
164.1 EB05 144.5 · IC025 +6.6
3/3 methods agree
Not in label — unassessedserious n=172 · ♀ 100% (drug 66%)not reported in cached trials
Poor quality device used2,169166.3
158.6–174.4ROR 175.4 · calibrated p 1e-9 ✓
124.8 EB05 120.5 · IC025 +6.9
3/3 methods agree
Not in label — unassessedserious n=97not reported in cached trials
Pleural thickening138128.6
106.7–155.0ROR 129.0 · calibrated p 2e-8 ✓
101.0 EB05 87.6 · IC025 +5.9
3/3 methods agree
Not in label — unassessedserious n=138not reported in cached trials
Bronchopulmonary aspergillosis allergic173117.8
99.8–139.0ROR 118.3 · calibrated p 4e-8 ✓
94.5 EB05 83.3 · IC025 +6.0
3/3 methods agree
Likely indication confounding
shares a disease stem with the indications wording
serious n=173not reported in cached trials
Polycystic ovaries277108.4
95.2–123.4ROR 109.1 · calibrated p 6e-8 ✓
88.7 EB05 80.2 · IC025 +6.1
3/3 methods agree
Not in label — unassessedserious n=275 · ♀ 100% (drug 66%)not reported in cached trials
Congenital hiatus hernia39108.0
76.4–152.7ROR 108.1 · calibrated p 1e-7 ✓
85.3 EB05 65.1 · IC025 +4.9
3/3 methods agree
Not in label — unassessedserious n=39 · ♀ 0% (drug 66%) · 100% cliniciannot reported in cached trials
Prolonged expiration46106.7
77.6–146.6ROR 106.8 · calibrated p 1e-7 ✓
85.0 EB05 66.3 · IC025 +5.0
3/3 methods agree
Not in label — unassessedserious n=46 · ♀ 100% (drug 66%)not reported in cached trials
Pleural fibrosis14784.2
70.7–100.3ROR 84.5 · calibrated p 5e-7 ✓
71.6 EB05 62.4 · IC025 +5.6
3/3 methods agree
Not in label — unassessedserious n=147 · ♀ 100% (drug 66%)not reported in cached trials
Obstructive sleep apnoea syndrome18878.8
67.5–91.8ROR 79.1 · calibrated p 7e-7 ✓
67.7 EB05 60.0 · IC025 +5.6
3/3 methods agree
Not in label — unassessedserious n=188 · ♀ 45% (drug 66%)not reported in cached trials
Blood magnesium increased10868.7
56.2–83.9ROR 68.8 · calibrated p 2e-6 ✓
59.9 EB05 51.0 · IC025 +5.3
3/3 methods agree
Lab value / disease markerserious n=108 · ♀ 100% (drug 66%)not reported in cached trials
Bronchial wall thickening7659.2
46.7–75.1ROR 59.3 · calibrated p 6e-6 ✓
52.4 EB05 43.2 · IC025 +4.9
3/3 methods agree
Likely indication confounding
shares a disease stem with the indications wording
serious n=76not reported in cached trials
Dust allergy9857.2
46.4–70.5ROR 57.3 · calibrated p 7e-6 ✓
50.9 EB05 43.0 · IC025 +5.0
3/3 methods agree
Not in label — unassessedserious n=97 · ♀ 23% (drug 66%)not reported in cached trials
Spirometry abnormal5653.3
40.4–70.2ROR 53.3 · calibrated p 1e-5 ✓
47.5 EB05 37.9 · IC025 +4.6
3/3 methods agree
Lab value / disease markerserious n=56 · ♀ 0% (drug 66%)not reported in cached trials
Nasal crusting6052.5
40.2–68.4ROR 52.5 · calibrated p 1e-5 ✓
46.9 EB05 37.8 · IC025 +4.7
3/3 methods agree
Not in label — unassessed100% consumernot reported in cached trials
Nasal polyps44251.0
46.3–56.2ROR 51.5 · calibrated p 1e-5 ✓
46.3 EB05 42.8 · IC025 +5.3
3/3 methods agree
Not in label — unassessedserious n=416not reported in cached trials
Factor v leiden mutation3650.3
35.7–70.8ROR 50.3 · calibrated p 2e-5 ✓
44.7 EB05 33.8 · IC025 +4.3
3/3 methods agree
Not in label — unassessedserious n=36 · ♀ 100% (drug 66%) · 100% cliniciannot reported in cached trials
Mite allergy5648.6
37.0–64.0ROR 48.7 · calibrated p 2e-5 ✓
43.8 EB05 35.0 · IC025 +4.6
3/3 methods agree
Not in label — unassessedserious n=56 · ♀ 0% (drug 66%)not reported in cached trials
Alveolar osteitis3545.2
32.0–63.9ROR 45.2 · calibrated p 4e-5 ✓
40.7 EB05 30.6 · IC025 +4.2
3/3 methods agree
Not in label — unassessedserious n=35 · ♀ 100% (drug 66%) · 100% cliniciannot reported in cached trials
Ejection fraction abnormal9542.4
34.4–52.2ROR 42.5 · calibrated p 4e-5 ✓
38.8 EB05 32.7 · IC025 +4.7
3/3 methods agree
Lab value / disease markerserious n=95 · ♀ 87% (drug 66%)not reported in cached trials
Myoglobin blood increased11842.1
34.9–50.8ROR 42.3 · calibrated p 4e-5 ✓
38.7 EB05 33.2 · IC025 +4.8
3/3 methods agree
Lab value / disease markerserious n=118 · ♀ 0% (drug 66%)not reported in cached trials
Urinary tract discomfort3441.0
28.9–58.2ROR 41.1 · calibrated p 7e-5 ✓
37.3 EB05 27.9 · IC025 +4.1
3/3 methods agree
Not in label — unassessedserious n=33 · ♀ 100% (drug 66%) · 100% cliniciannot reported in cached trials
Mycotic allergy6240.1
31.0–52.0ROR 40.2 · calibrated p 7e-5 ✓
36.8 EB05 29.8 · IC025 +4.4
3/3 methods agree
Not in label — unassessedserious n=59 · ♀ 0% (drug 66%)not reported in cached trials
Vital capacity decreased3238.6
27.0–55.3ROR 38.7 · calibrated p 1e-4 ✓
35.2 EB05 26.1 · IC025 +4.0
3/3 methods agree
Not in label — unassessedserious n=32 · ♀ 100% (drug 66%) · 100% cliniciannot reported in cached trials
Total lung capacity decreased11238.0
31.4–46.0ROR 38.1 · calibrated p 8e-5 ✓
35.2 EB05 30.1 · IC025 +4.6
3/3 methods agree
Not in label — unassessedserious n=108 · ♀ 88% (drug 66%)not reported in cached trials
Sinus polyp4037.7
27.3–52.0ROR 37.7 · calibrated p 1e-4 ✓
34.6 EB05 26.5 · IC025 +4.1
3/3 methods agree
Not in label — unassessedserious n=34 · ♀ 0% (drug 66%)NCT00941798: 1/749 (0.1%) on Mometasone Furoate (serious AE)
Bone cyst6537.5
29.2–48.3ROR 37.6 · calibrated p 1e-4 ✓
34.7 EB05 28.1 · IC025 +4.4
3/3 methods agree
Not in label — unassessedserious n=65 · ♀ 100% (drug 66%) · 100% cliniciannot reported in cached trials
Eosinophilic granulomatosis with polyangiitis12433.1
27.6–39.7ROR 33.2 · calibrated p 2e-4 ✓
30.9 EB05 26.6 · IC025 +4.5
3/3 methods agree
Not in label — unassessedserious n=124 · ♀ 17% (drug 66%)not reported in cached trials
Nephrectomy9133.0
26.7–40.8ROR 33.1 · calibrated p 2e-4 ✓
30.9 EB05 25.9 · IC025 +4.4
3/3 methods agree
Not in label — unassessedserious n=91 · ♀ 100% (drug 66%)not reported in cached trials
Obstructive airways disorder68332.9
30.5–35.6ROR 33.5 · calibrated p 1e-4 ✓
30.9 EB05 29.0 · IC025 +4.8
3/3 methods agree
Not in label — unassessedserious PRR 33.0not reported in cached trials
Pulmonary vasculitis3232.6
22.8–46.5ROR 32.6 · calibrated p 3e-4 ✓
30.1 EB05 22.3 · IC025 +3.8
3/3 methods agree
Not in label — unassessedserious n=32 · ♀ 0% (drug 66%) · 100% cliniciannot reported in cached trials

Trial evidence (ClinicalTrials.gov)

✓ Trial adverse-event data found on ClinicalTrials.gov

Largest completed trials with posted results that list Mometasone Furoate 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 (2 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
Product quality issue4,34516.8
16.4–17.3ROR 18.7 · calibrated p 0.003 ✓
16.3 EB05 15.9 · IC025 +4.0
3/3 methods agree
Reporting / coding artifactserious PRR 3.7not reported in cached trials
No adverse event4,33512.7
12.3–13.0ROR 14.0 · calibrated p 0.009 ✓
12.4 EB05 12.1 · IC025 +3.6
3/3 methods agree
Reporting / coding artifact–NCT01471340: 1/5,861 (0.0%) on Mometasone Furoate
Dyspnoea (shortness of breath)3,9493.6
3.4–3.7ROR 3.8 · calibrated p 0.413
3.5 EB05 3.4 · IC025 +1.8
3/3 methods agree
Labeled adverse reaction
exact term
serious PRR 3.9NCT01471340: 4/5,868 (0.1%) on Mometasone Furoate
Drug ineffective (drug did not work)3,0201.2
1.1–1.2ROR 1.2 · calibrated p 0.422
1.2 EB05 1.1 · IC025 +0.2Reporting / coding artifactserious PRR 1.9not reported in cached trials
Drug dose omission2,9078.9
8.6–9.2ROR 9.5 · calibrated p 0.038 ✓
8.8 EB05 8.5 · IC025 +3.1
3/3 methods agree
Reporting / coding artifactserious PRR 2.4not reported in cached trials
Headache2,8652.3
2.2–2.4ROR 2.4 · calibrated p 0.848
2.3 EB05 2.2 · IC025 +1.1
3/3 methods agree
Labeled adverse reaction
exact term
serious PRR 3.7NCT01471340: 1/5,868 (0.0%) on Mometasone Furoate (serious AE)
Asthma2,85213.2
12.7–13.7ROR 14.1 · calibrated p 0.009 ✓
12.9 EB05 12.5 · IC025 +3.6
3/3 methods agree
Likely indication confounding
term in indications; also in warnings
serious PRR 16.3NCT01471340: 32/5,868 (0.5%) on Mometasone Furoate (serious AE)
Cough2,7355.0
4.8–5.2ROR 5.3 · calibrated p 0.207
4.9 EB05 4.8 · IC025 +2.2
3/3 methods agree
Labeled adverse reaction
exact term
serious PRR 6.6NCT01471340: 2/5,868 (0.0%) on Mometasone Furoate
Fatigue (tiredness)2,5821.7
1.6–1.7ROR 1.7 · calibrated p 0.788
1.7 EB05 1.6 · IC025 +0.7Labeled adverse reaction
exact term
serious PRR 2.5not reported in cached trials
Nausea2,3241.5
1.4–1.6ROR 1.5 · calibrated p 0.656
1.5 EB05 1.4 · IC025 +0.5Labeled adverse reaction
exact term
serious PRR 2.2NCT01471340: 1/5,868 (0.0%) on Mometasone Furoate
Poor quality device used2,169166.3
158.6–174.4ROR 175.4 · calibrated p 1e-9 ✓
124.8 EB05 120.5 · IC025 +6.9
3/3 methods agree
Not in label — unassessedserious n=97not reported in cached trials
Wheezing1,92817.0
16.3–17.8ROR 17.8 · calibrated p 0.003 ✓
16.5 EB05 15.9 · IC025 +4.0
3/3 methods agree
Labeled adverse reaction
exact term
serious PRR 20.7NCT01471340: 3/5,861 (0.1%) on Mometasone Furoate
Pain1,9011.6
1.5–1.6ROR 1.6 · calibrated p 0.702
1.6 EB05 1.5 · IC025 +0.6Labeled adverse reaction
exact term
serious PRR 2.1NCT01471340: 2/5,868 (0.0%) on Mometasone Furoate (serious AE)
Off label use (used outside approved label)1,6661.0
0.9–1.0ROR 1.0 · calibrated p 0.287
1.0 EB05 0.9 · IC025 -0.1
PRR-only: not supported by EBGM or IC
Reporting / coding artifactserious 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.

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 Mometasone Furoate?

In FDA FAERS, the most frequently co-reported reaction terms for Mometasone Furoate are dyspnoea, headache, asthma, cough, fatigue, nausea. 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 Mometasone Furoate have an FDA boxed warning?

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

Do FAERS signals prove that Mometasone Furoate 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.