Eosinophilia adverse event reports that record this term

Kind of term: MedDRA preferred term

What a report is

A report is not proof that the drug was the cause of the event.

FDA says:

Adverse event reports submitted to FDA do not undergo extensive validation or verification. Therefore, a causal relationship cannot be established between product and reactions listed in a report. While a suspected relationship may exist, it is not medically validated and should not be the sole source of information for clinical decision making or other assumptions about the safety or efficacy of a product. Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.
Source: openFDA, Drug Adverse Event Overview, section "Responsible use of the data". The site read the page on 2 Oct 2026. The data have the reports that FDA received through 30 Jun 2026.

FDA also says:

There is no certainty that the reported event (adverse event or medication error) was actually due to the product. FDA does not require that a causal relationship between a product and event be proven, and reports do not always contain enough detail to properly evaluate an event. The information in these reports has not been scientifically or otherwise verified as to a cause and effect relationship and cannot be used to estimate the incidence of these events.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

Do not rely on openFDA to make decisions regarding medical care. While we make every effort to ensure that data is accurate, you should assume all results are unvalidated.
Source: openFDA, Response of the drug event API (meta.disclaimer). The site read the page on 2 Oct 2026.

Not medical advice. This site counts what was reported to FDA. Questions about a medicine or device belong with a pharmacist or clinician.

Reports on file

From January 2004 to June 2026, FDA received 17,165 adverse event reports that record the MedDRA preferred term Eosinophilia. The person who codes a report selects the term that agrees best with the description of the reporter.

FDA received 1,136 reports in the 12 months to June 2026 and 1,170 in the 12 months before. FDA releases FAERS data every quarter, so the newest months are not complete. They grow in later releases.

The number of people who use the product is not in the data. A count is not a rate.

MedDRA

The Medical Dictionary for Regulatory Activities. The person who codes a report selects the preferred term that agrees best with the description of the reporter. FDA does not publish the description.

Data version

openFDA FAERS release of 1 Oct 2026. Reports received through 30 Jun 2026.

Drugs in these reports

The table has the 123 drug pages with 100 or more reports that record this term. The rows are in order of name. A drug page with fewer reports for this term is not in the table. The counts are the counts that the site keeps for each reaction term, and a count can be lower than the count of FDA.

FDA says:

Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

Importantly, the AEMS data by themselves are not an indicator of the safety profile of the drug or biologic.
Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of 11 Mar 2026. The site read the page on 2 Oct 2026.

Drugs that the reports with the term Eosinophilia name as a suspect product, in order of name
Drug	Class	Reports with this term
Acetaminophen		201
Advair Hfa	Corticosteroid	116
Albuterol	beta2-Adrenergic agonist	446
Albuterol sulfate	beta2-Adrenergic agonist	438
Allopurinol	Xanthine oxidase inhibitor	621
Alvesco		198
Ambroxol hydrochloride		119
Amlodipine	Calcium channel blocker	183
Amoxicillin	Penicillin-class antibacterial	373
Aspirin	Nonsteroidal anti-inflammatory drug	226
Atorvastatin		294
Augmentin	Penicillin-class antibacterial	167
Azithromycin	Macrolide antimicrobial	226
Azithromycin Anhydrous		157
Aztreonam		106
Bactrim	Dihydrofolate reductase inhibitor antibacterial	402
Biotin	Arteriolar vasodilator	119
Bisoprolol	beta-Adrenergic blocker	228
Bisoprolol fumarate	beta-Adrenergic blocker	122
Breo Ellipta	Corticosteroid	139
Budesonide	Corticosteroid	362
Budesonide Formoterol Fumarate		211
Calcium carbonate	Blood coagulation factor	120
Carbamazepine	Mood stabilizer	279
Ceftriaxone	Cephalosporin antibacterial	297
Ceftriaxone sodium	Cephalosporin antibacterial	198
Ciprofloxacin	Fluoroquinolone antibacterial	253
Clonazepam	Benzodiazepine	132
Clopidogrel	P2Y12 platelet inhibitor	140
Clozapine	Atypical antipsychotic	378
Clozaril	Atypical antipsychotic	553
Colesevelam hydrochloride		110
Crestor	HMG-CoA reductase inhibitor	148
Cubicin		201
Daptomycin		328
Dexamethasone	Corticosteroid	118
Diclofenac	Nonsteroidal anti-inflammatory drug	124
Dupilumab	Interleukin-4 receptor alpha antagonist	111
Dupixent	Interleukin-4 receptor alpha antagonist	407
Ergocalciferol	Provitamin D2 compound	191
Esomeprazole	Proton pump inhibitor	139
Fluconazole	Azole antifungal	134
Fluticasone Propionate Salmeterol Xinafoate		142
Furosemide	Loop diuretic	418
Ginkgo		103
Herbals		119
Humira		123
Hydrochlorothiazide	Thiazide diuretic	129
Hydroxychloroquine	Antimalarial	101
Ibuprofen	Nonsteroidal anti-inflammatory drug	333
Inexium		149
Iomeron	Radiographic contrast agent	103
Ipratropium		108
Ipratropium bromide	Anticholinergic	336
Isoniazid	Antimycobacterial	100
Kardegic		199
Keytruda	Programmed death Receptor-1 blocking antibody	116
Lamictal	Anti-epileptic agent	142
Lamotrigine	Anti-epileptic agent	241
Lansoprazole	Proton pump inhibitor	272
Lenalidomide	Thalidomide analog	122
Levetiracetam		218
Levofloxacin	Fluoroquinolone antibacterial	245
Linezolid	Oxazolidinone antibacterial	153
Lovenox	Low molecular weight heparin	301
Mepolizumab	Interleukin-5 antagonist	165
Meropenem	Penem antibacterial	316
Metformin	Biguanide	134
Methotrexate	Folate analog metabolic inhibitor	211
Methylprednisolone	Corticosteroid	113
Metronidazole	Nitroimidazole antimicrobial	125
Mometasone		128
Mometasone furoate	Corticosteroid	141
Montelukast	Leukotriene receptor antagonist	139
Montelukast sodium	Leukotriene receptor antagonist	190
Nucala	Interleukin-5 antagonist	490
Olanzapine	Atypical antipsychotic	171
Omalizumab	Anti-IgE	236
Omeprazole	Proton pump inhibitor	244
Opdivo	Programmed death Receptor-1 blocking antibody	118
Pantoprazole	Proton pump inhibitor	541
Paracetamol		120
Perindopril		170
Phenytoin	Anti-epileptic agent	112
Piperacillin and tazobactam	Penicillin-class antibacterial	205
Piperacillin sodium,tazobactam sodium		216
Plavix	P2Y12 platelet inhibitor	125
Praluent	PCSK9 inhibitor	116
Prednisolone	Corticosteroid	133
Prednisone	Corticosteroid	834
Pregabalin		180
Pulmicort Turbuhaler		247
Ramipril	Angiotensin converting enzyme inhibitor	196
Revlimid	Thalidomide analog	160
Rifampicin		163
Rifampin	Rifamycin antibacterial	165
Rituximab	CD20-directed cytolytic antibody	200
Rivaroxaban	Factor Xa inhibitor	138
Rosuvastatin calcium	HMG-CoA reductase inhibitor	166
Rupatadine		151
Rupatadine Fumarate		155
Salbutamol		144
Salbutamol sulfate		135
Sertraline	Serotonin reuptake inhibitor	108
Sertraline hydrochloride	Serotonin reuptake inhibitor	116
Singulair	Leukotriene receptor antagonist	669
Spironolactone	Aldosterone antagonist	162
Symbicort	Corticosteroid	373
Tacrolimus	Calcineurin inhibitor immunosuppressant	110
Tadalafil	Phosphodiesterase 5 inhibitor	107
Tamiflu	Neuraminidase inhibitor	186
Tamsulosin		108
Tazocilline		144
Tegretol	Mood stabilizer	134
Tiotropium bromide	Anticholinergic	490
Tylenol	Expectorant	115
Valacyclovir hydrochloride	Herpes simplex virus nucleoside analog DNA polymerase inhibitor	100
Vancomycin	Glycopeptide antibacterial	627
Vancomycin hydrochloride	Glycopeptide antibacterial	104
Xarelto	Factor Xa inhibitor	210
Xolair	Anti-IgE	128
Zenhale		128
Zopiclone		107

The page of each drug has the count of each reaction term in its reaction lookup.

Drug classes in these reports

The table has the 41 pharmacologic classes with 250 or more reports that record this term. The rows are in order of name.

FDA says:

Additionally, it is important to remember that adverse event reports represent a small percentage of total usage numbers of a product. Common products may have a higher number of adverse events due to the higher total number of people using the product.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

Importantly, the AEMS data by themselves are not an indicator of the safety profile of the drug or biologic.
Source: FDA, FDA Adverse Event Monitoring System (AEMS) Public Dashboard. Content current as of 11 Mar 2026. The site read the page on 2 Oct 2026.

Pharmacologic classes of the drugs that the reports with the term Eosinophilia name, in order of name
Class	Reports with this term
Aldosterone antagonist	281
Angiotensin 2 receptor blocker	286
Angiotensin converting enzyme inhibitor	273
Anti-epileptic agent	839
Anti-IgE	364
Anticholinergic	1,004
Atypical antipsychotic	1,395
Benzodiazepine	584
beta-Adrenergic blocker	480
beta2-Adrenergic agonist	1,004
Cephalosporin antibacterial	875
Corticosteroid	2,648
Dihydrofolate reductase inhibitor antibacterial	527
Factor Xa inhibitor	491
Fluoroquinolone antibacterial	588
Folate analog metabolic inhibitor	276
Glycopeptide antibacterial	731
Herpes simplex virus nucleoside analog DNA polymerase inhibitor	265
Histamine-1 receptor antagonist	278
HMG-CoA reductase inhibitor	598
Interleukin-4 receptor alpha antagonist	518
Interleukin-5 antagonist	655
Kinase inhibitor	312
Leukotriene receptor antagonist	998
Loop diuretic	518
Low molecular weight heparin	378
Macrolide antimicrobial	305
Mood stabilizer	468
Nonsteroidal anti-inflammatory drug	928
P2Y12 platelet inhibitor	413
PCSK9 inhibitor	256
Penem antibacterial	354
Penicillin-class antibacterial	795
Programmed death Receptor-1 blocking antibody	411
Proton pump inhibitor	1,404
Provitamin D2 compound	266
Radiographic contrast agent	283
Serotonin reuptake inhibitor	383
Thalidomide analog	292
Tumor necrosis factor blocker	287
Xanthine oxidase inhibitor	650

A class with many reports in all has many reports for almost every term.

Reports by month

Reports that record Eosinophilia, by month, five years to June 2026

FDA releases FAERS data every quarter, so the newest months are not complete. They grow in later releases.

Patients in these reports

Age of the patient in the reports that record Eosinophilia
Age	Reports	Share
Under 2	113	0.7%
2 to 11	378	2.2%
12 to 17	330	1.9%
18 to 44	2,886	16.8%
45 to 64	4,705	27.4%
65 to 74	2,800	16.3%
75 and over	3,017	17.6%
Age not given	2,936	17.1%

Sex of the patient in the reports that record Eosinophilia
Sex	Reports	Share
Female	7,372	42.9%
Male	8,244	48%
Unknown or not given	1,549	9%

Age and sex are as the report gives them. 16.2% of these reports give the United States as the country.

Terms near this one

These are the next terms in the A to Z list. The links are for navigation.

Official pages

MedWatch Online Voluntary Reporting FormThe online form of FDA for a voluntary report.
MedWatch: The FDA Safety Information and Adverse Event Reporting ProgramThe page of the FDA program that receives reports about drugs and devices.
FDA Adverse Event Monitoring System (AEMS) Public DashboardThe public dashboard of FDA for adverse event reports on drugs and biologics.

The site checked these addresses on 2 Oct 2026. The links open in a new tab.

Cite this page

Reported Reactions. Eosinophilia: adverse event reports that record this term. https://reportedreactions.com/reaction/eosinophilia/ Source: U.S. Food and Drug Administration, openFDA Drug Adverse Event (FAERS) files, release of 1 Oct 2026. Reports received through 30 Jun 2026.

Where the data come from

The counts come from the openFDA Drug Adverse Event (FAERS) bulk files, release of 1 Oct 2026. The files have the reports that FDA received through 30 Jun 2026. A drug name is the name on the report. The site matches it to a brand name or a generic name of the National Drug Code Directory of 2 Oct 2026. A class is the pharmacologic class (EPC) of the FDA label.

The count has the reports with each spelling of one MedDRA preferred term. The site does not publish a report narrative, a lot number, a detail of a patient or the identity of a reporter. The record of FDA is the authority. See how the site counts reports, the data sources and the corrections page.

Questions

What does Eosinophilia mean in an adverse event report?

It is a MedDRA preferred term. FDA codes the description of a reporter with the MedDRA dictionary. The openFDA files do not have the description itself, and this site does not show it.

Does a drug in the table mean that the drug was responsible for this reaction?

No. FDA says:

No individual drug is connected to any individual reaction.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

When a report lists multiple drugs and multiple reactions, there is no way to conclude from the data therein that a given drug is responsible for a given reaction.
Source: openFDA, Drug Adverse Event Overview. The site read the page on 2 Oct 2026.

What does this page tell a person who has this symptom?

This page gives counts of reports. It cannot assess a person. A pharmacist or a clinician can assess a person.

If this is a medical emergency, please call 911.
Source: FDA, MedWatch Online Voluntary Reporting Form. The site read the page on 2 Oct 2026.

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