Mometasone Furoate side effects: what 41,415 FDA adverse event reports show
Drug class
Corticosteroid
Brand names
Asmanex
Who reports
41,415 reports · 56% serious · 1,576 with death outcome · 66% female
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.
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.
Boxed warning
None in the current label
Causality screen of the 40 strongest signals
What the badges mean
- Labeled (related wording) The label describes this effect under different wording (e.g. 'neutropenia' for 'neutrophil count decreased'). Treated as known.
- Likely indication confounding The term appears in the label's indications: reports probably describe the disease being treated (or its progression), not a drug effect. Classic confounding by indication.
- Lab value / disease marker A laboratory result, investigation or disease-activity marker (antibody positive, CRP abnormal, swollen joint count) not described in the label. These usually mirror the monitored disease or testing protocol rather than a drug effect; not screened further.
- Not in label — unassessed Not found in the label text, not an artifact pattern. This is a genuine candidate for a formal causality assessment (Bradford Hill / WHO-UMC); it has NOT had one here.
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.
| Reaction | Reports | PRR 95% CI · ROR · χ²/p | EBGM EB05 · IC025 | Label screen | Serious-only & strata | Trial cross-check |
|---|---|---|---|---|---|---|
| Fractional exhaled nitric oxide increased | 120 | 1,172.9 845.3–1,627.3ROR 1,176.3 · calibrated p 2e-17 ✓ | 331.9 EB05 285.0 · IC025 +6.9 3/3 methods agree | Not in label — unassessed | serious n=120 · ♀ 0% (drug 66%) | not reported in cached trials |
| Total lung capacity increased | 157 | 692.6 543.9–881.8ROR 695.2 · calibrated p 4e-15 ✓ | 280.5 EB05 245.6 · IC025 +7.0 3/3 methods agree | Not in label — unassessed | serious n=157 · ♀ 100% (drug 66%) | not reported in cached trials |
| Ejection fraction | 256 | 397.5 337.4–468.4ROR 400.0 · calibrated p 8e-13 ✓ | 218.0 EB05 196.5 · IC025 +7.1 3/3 methods agree | Not in label — unassessed | serious n=256 · ♀ 100% (drug 66%) | not reported in cached trials |
| Presbyacusis | 135 | 391.2 312.4–490.0ROR 392.5 · calibrated p 1e-12 ✓ | 213.0 EB05 184.5 · IC025 +6.6 3/3 methods agree | Not in label — unassessed | serious n=135 · ♀ 100% (drug 66%) | not reported in cached trials |
| Heart sounds | 42 | 387.7 259.1–580.2ROR 388.1 · calibrated p 5e-12 ✓ | 198.9 EB05 153.3 · IC025 +5.4 3/3 methods agree | Not in label — unassessed | serious n=42 · ♀ 100% (drug 66%) | not reported in cached trials |
| Rhinitis perennial | 32 | 332.3 212.5–519.7ROR 332.6 · calibrated p 3e-11 ✓ | 178.6 EB05 132.5 · IC025 +5.0 3/3 methods agree | Not in label — unassessed | serious n=31 · ♀ 0% (drug 66%) · 100% clinician | not reported in cached trials |
| Sensitisation | 273 | 281.7 243.0–326.7ROR 283.6 · calibrated p 2e-11 ✓ | 178.1 EB05 161.1 · IC025 +6.9 3/3 methods agree | Not in label — unassessed | serious n=272 · ♀ 100% (drug 66%) | not reported in cached trials |
| Asthma-chronic obstructive pulmonary disease overlap syndrome | 172 | 250.7 208.8–301.0ROR 251.7 · calibrated p 7e-11 ✓ | 164.1 EB05 144.5 · IC025 +6.6 3/3 methods agree | Not in label — unassessed | serious n=172 · ♀ 100% (drug 66%) | not reported in cached trials |
| Poor quality device used | 2,169 | 166.3 158.6–174.4ROR 175.4 · calibrated p 1e-9 ✓ | 124.8 EB05 120.5 · IC025 +6.9 3/3 methods agree | Not in label — unassessed | serious n=97 | not reported in cached trials |
| Topical steroid withdrawal reaction | 94 | 164.4 130.2–207.5ROR 164.8 · calibrated p 3e-9 ✓ | 120.9 EB05 101.7 · IC025 +5.9 3/3 methods agree | Labeled (related wording) related wording | serious n=93 · ♀ 100% (drug 66%) · 82% consumer | not reported in cached trials |
| Pleural thickening | 138 | 128.6 106.7–155.0ROR 129.0 · calibrated p 2e-8 ✓ | 101.0 EB05 87.6 · IC025 +5.9 3/3 methods agree | Not in label — unassessed | serious n=138 | not reported in cached trials |
| Bronchopulmonary aspergillosis allergic | 173 | 117.8 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=173 | not reported in cached trials |
| Polycystic ovaries | 277 | 108.4 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 — unassessed | serious n=275 · ♀ 100% (drug 66%) | not reported in cached trials |
| Congenital hiatus hernia | 39 | 108.0 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 — unassessed | serious n=39 · ♀ 0% (drug 66%) · 100% clinician | not reported in cached trials |
| Prolonged expiration | 46 | 106.7 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 — unassessed | serious n=46 · ♀ 100% (drug 66%) | not reported in cached trials |
| Pleural fibrosis | 147 | 84.2 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 — unassessed | serious n=147 · ♀ 100% (drug 66%) | not reported in cached trials |
| Obstructive sleep apnoea syndrome | 188 | 78.8 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 — unassessed | serious n=188 · ♀ 45% (drug 66%) | not reported in cached trials |
| Rhinitis allergic | 597 | 78.6 72.1–85.6ROR 79.7 · calibrated p 6e-7 ✓ | 67.9 EB05 63.4 · IC025 +5.9 3/3 methods agree | Labeled (related wording) related wording | serious n=576 | NCT01471340: 1/5,868 (0.0%) on Mometasone Furoate |
| Asthma exercise induced | 43 | 71.4 51.9–98.3ROR 71.5 · calibrated p 2e-6 ✓ | 61.0 EB05 47.2 · IC025 +4.7 3/3 methods agree | Labeled (related wording) related wording | serious n=39 · ♀ 100% (drug 66%) · 100% clinician | not reported in cached trials |
| Blood magnesium increased | 108 | 68.7 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 marker | serious n=108 · ♀ 100% (drug 66%) | not reported in cached trials |
| Bronchial wall thickening | 76 | 59.2 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=76 | not reported in cached trials |
| Dust allergy | 98 | 57.2 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 — unassessed | serious n=97 · ♀ 23% (drug 66%) | not reported in cached trials |
| Spirometry abnormal | 56 | 53.3 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 marker | serious n=56 · ♀ 0% (drug 66%) | not reported in cached trials |
| Nasal crusting | 60 | 52.5 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 — unassessed | 100% consumer | not reported in cached trials |
| Nasal polyps | 442 | 51.0 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 — unassessed | serious n=416 | not reported in cached trials |
| Factor v leiden mutation | 36 | 50.3 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 — unassessed | serious n=36 · ♀ 100% (drug 66%) · 100% clinician | not reported in cached trials |
| Mite allergy | 56 | 48.6 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 — unassessed | serious n=56 · ♀ 0% (drug 66%) | not reported in cached trials |
| Alveolar osteitis | 35 | 45.2 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 — unassessed | serious n=35 · ♀ 100% (drug 66%) · 100% clinician | not reported in cached trials |
| Ejection fraction abnormal | 95 | 42.4 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 marker | serious n=95 · ♀ 87% (drug 66%) | not reported in cached trials |
| Myoglobin blood increased | 118 | 42.1 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 marker | serious n=118 · ♀ 0% (drug 66%) | not reported in cached trials |
| Urinary tract discomfort | 34 | 41.0 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 — unassessed | serious n=33 · ♀ 100% (drug 66%) · 100% clinician | not reported in cached trials |
| Mycotic allergy | 62 | 40.1 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 — unassessed | serious n=59 · ♀ 0% (drug 66%) | not reported in cached trials |
| Vital capacity decreased | 32 | 38.6 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 — unassessed | serious n=32 · ♀ 100% (drug 66%) · 100% clinician | not reported in cached trials |
| Total lung capacity decreased | 112 | 38.0 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 — unassessed | serious n=108 · ♀ 88% (drug 66%) | not reported in cached trials |
| Sinus polyp | 40 | 37.7 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 — unassessed | serious n=34 · ♀ 0% (drug 66%) | NCT00941798: 1/749 (0.1%) on Mometasone Furoate (serious AE) |
| Bone cyst | 65 | 37.5 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 — unassessed | serious n=65 · ♀ 100% (drug 66%) · 100% clinician | not reported in cached trials |
| Eosinophilic granulomatosis with polyangiitis | 124 | 33.1 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 — unassessed | serious n=124 · ♀ 17% (drug 66%) | not reported in cached trials |
| Nephrectomy | 91 | 33.0 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 — unassessed | serious n=91 · ♀ 100% (drug 66%) | not reported in cached trials |
| Obstructive airways disorder | 683 | 32.9 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 — unassessed | serious PRR 33.0 | not reported in cached trials |
| Pulmonary vasculitis | 32 | 32.6 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 — unassessed | serious n=32 · ♀ 0% (drug 66%) · 100% clinician | not 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).
- NCT01471340 — A Serious Asthma Outcome Study With Mometasone Furoate/Formoterol Versus Mometasone Furoate in Asthmatics 12 Y (N=11744, PHASE4; 249 AE terms posted; arms: MF/F MDI BID; MF MDI BID)
- NCT00941798 — Safety of QMF149 Twisthaler® in Adolescent and Adult Patients With Asthma (N=2283, PHASE2; 101 AE terms posted; arms: QMF149 Twisthaler® 500/400; Mometasone Twisthaler®)
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.
| Reaction | Reports | PRR 95% CI · ROR · χ²/p | EBGM EB05 · IC025 | Label screen | Serious-only & strata | Trial cross-check |
|---|---|---|---|---|---|---|
| Product quality issue | 4,345 | 16.8 16.4–17.3ROR 18.7 · calibrated p 0.003 ✓ | 16.3 EB05 15.9 · IC025 +4.0 3/3 methods agree | Reporting / coding artifact | serious PRR 3.7 | not reported in cached trials |
| No adverse event | 4,335 | 12.7 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) | 3,949 | 3.6 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 3.9 | NCT01471340: 4/5,868 (0.1%) on Mometasone Furoate |
| Drug ineffective (drug did not work) | 3,020 | 1.2 1.1–1.2ROR 1.2 · calibrated p 0.422 | 1.2 EB05 1.1 · IC025 +0.2 | Reporting / coding artifact | serious PRR 1.9 | not reported in cached trials |
| Drug dose omission | 2,907 | 8.9 8.6–9.2ROR 9.5 · calibrated p 0.038 ✓ | 8.8 EB05 8.5 · IC025 +3.1 3/3 methods agree | Reporting / coding artifact | serious PRR 2.4 | not reported in cached trials |
| Headache | 2,865 | 2.3 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 3.7 | NCT01471340: 1/5,868 (0.0%) on Mometasone Furoate (serious AE) |
| Asthma | 2,852 | 13.2 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 16.3 | NCT01471340: 32/5,868 (0.5%) on Mometasone Furoate (serious AE) |
| Cough | 2,735 | 5.0 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 6.6 | NCT01471340: 2/5,868 (0.0%) on Mometasone Furoate |
| Fatigue (tiredness) | 2,582 | 1.7 1.6–1.7ROR 1.7 · calibrated p 0.788 | 1.7 EB05 1.6 · IC025 +0.7 | Labeled adverse reaction exact term | serious PRR 2.5 | not reported in cached trials |
| Nausea | 2,324 | 1.5 1.4–1.6ROR 1.5 · calibrated p 0.656 | 1.5 EB05 1.4 · IC025 +0.5 | Labeled adverse reaction exact term | serious PRR 2.2 | NCT01471340: 1/5,868 (0.0%) on Mometasone Furoate |
| Poor quality device used | 2,169 | 166.3 158.6–174.4ROR 175.4 · calibrated p 1e-9 ✓ | 124.8 EB05 120.5 · IC025 +6.9 3/3 methods agree | Not in label — unassessed | serious n=97 | not reported in cached trials |
| Wheezing | 1,928 | 17.0 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 20.7 | NCT01471340: 3/5,861 (0.1%) on Mometasone Furoate |
| Pain | 1,901 | 1.6 1.5–1.6ROR 1.6 · calibrated p 0.702 | 1.6 EB05 1.5 · IC025 +0.6 | Labeled adverse reaction exact term | serious PRR 2.1 | NCT01471340: 2/5,868 (0.0%) on Mometasone Furoate (serious AE) |
| Pneumonia (lung infection) | 1,772 | 2.8 2.7–2.9ROR 2.9 · calibrated p 0.672 | 2.8 EB05 2.7 · IC025 +1.4 3/3 methods agree | Labeled (related wording) related wording | serious PRR 2.9 | NCT01471340: 10/5,868 (0.2%) on Mometasone Furoate (serious AE) |
| Off label use (used outside approved label) | 1,666 | 1.0 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 artifact | serious PRR 1.4 | not 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.
- Fractional exhaled nitric oxide increased — n=120, PRR 1,172.9
- Total lung capacity increased — n=157, PRR 692.6
- Ejection fraction — n=256, PRR 397.5
- Presbyacusis — n=135, PRR 391.2
- Heart sounds — n=42, PRR 387.7
- Rhinitis perennial — n=32, PRR 332.3
- Sensitisation — n=273, PRR 281.7
- Asthma-chronic obstructive pulmonary disease overlap syndrome — n=172, PRR 250.7
- Poor quality device used — n=2,169, PRR 166.3
- Pleural thickening — n=138, PRR 128.6
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
- FDA label via openFDA (set ID 10b36fb2-6b0d-4f20-b197-3564d6f594b9, effective 20260707; matched on
openfda.generic_name.exact:"MOMETASONE FUROATE") - Bayesian shrinkage measures computed offline over all 1,317,300 cached pairs: BCPNN information component (IC, with Norén closed-form IC025) and MGPS empirical-Bayes geometric mean (EBGM, EB05) with a two-component gamma prior fitted by maximum marginal likelihood (α₁=0.57, β₁=0.02, α₂=1.42, β₂=0.70, w=0.17); unstratified
- FAERS pair statistics from the OpenPV build of 2026-09-14 (openFDA
count=aggregation, fieldpatient.drug.openfda.generic_name.exact, 1,223 reaction terms, min 3 co-reports); PRR/ROR with 95% CI, chi-square with Yates correction - Serious-only and stratified counts (serious:1, patient.patientsex, primarysource.qualification) from openFDA count queries; serious-only PRR uses the drug serious report total and the term global serious total (N_serious=11,882,979); strata shown only when n ≥ 20
- Seriousness and sex counts from openFDA
count=serious,patient.patientsex,seriousnessdeath - ClinicalTrials.gov API v2 (query
MOMETASONE FUROATE, results-bearing studies sorted by enrollment)
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.