Drugs › Radiographic contrast agent
Brand name · Iohexol
Omnipaque: adverse event reports filed with FDA
7,562 reports list it as a suspect or interacting product, 2004–2026. Class: Radiographic contrast agent. Also reported as Omnipaque 180, Omnipaque 300, Omnipaque 350.
- 7,562
- reports as suspect product
- 0% of all reports · about 336 a year
- 661
- reports, 12 months to June 2026
- 637 in the 12 months before
- 80.7%
- marked serious by the reporter
- 77% across the class
- 5.9%
- record death among outcomes, as reported
- 448 reports · not verified by FDA
7,562 adverse event reports received by FDA list the brand name Omnipaque (iohexol) as a suspect or interacting product, from January 2004 to June 2026. A further 809 reports list it only as a concomitant medication, and those are not counted in the figures on this page.
In the 12 months to June 2026, 661 reports listed it, close to the 637 of the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Over its reporting history that is about 336 reports a year and 0% of the 20,646,523 reports in the database, and 28% of the reports for the radiographic contrast agent class. How many people take it is not in the data, so a count is not a rate of occurrence.
The reactions recorded most often are urticaria (13.5%), pruritus (11.7%) and dyspnoea (10%). A report can list several reactions, so shares add to more than 100%; 656 different terms appear across these reports. Urticaria is recorded in 13.5% of these reports, a larger share than in the median radiographic contrast agent drug (7.2%).
80.7% of the reports are marked serious by the reporter (77% across the class); 5.9% record death among the outcomes and 30.2% record hospitalisation, as reported. 66% of the reports came from other health professionals, and the largest patient age group is 45 to 64 (28.1%). FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event."
Reports by month, five years
Reports by the month FDA received them. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases.
By year received
2026 covers reports received through June 2026 only.
Reactions recorded in the reports
share of Omnipaque reports recording the termmedian drug in radiographic contrast agent
- Urticariahives13.5%1,019
- Pruritusitching11.7%883
- Dyspnoeashortness of breath10%757
- Sneezing8.1%609
- Erythemaskin redness7.6%576
- Nauseafeeling sick6.1%463
- Vomitingbeing sick5.6%421
- Rashskin rash4.9%368
- Chillschills or shivering4.5%344
- Coughcough3.9%298
- Contrast media reaction3.7%279
- Anaphylactic reactiona severe, sudden allergic reaction3.4%259
- Hypotensionlow blood pressure3.3%247
- Chest discomfortchest discomfort3.2%245
- Dizzinesslight-headedness or unsteadiness3.2%244
- Throat irritationan irritated throat3.2%243
- Hypersensitivityan allergic-type reaction3.2%241
- Contrast media allergy3.1%235
- Pyrexiafever2.7%204
- Throat tightnessa tight throat2.7%202
- Anaphylactic shocka severe allergic reaction with collapse2.7%201
- Blood pressure decreaseda low blood pressure reading2.6%193
- Headachehead pain2.5%192
- Loss of consciousnesspassing out2.5%188
- Acute kidney injurysudden loss of kidney function2.2%169
- Extravasation2%152
- Dysphagiadifficulty swallowing1.9%140
- Malaisegeneral feeling of being unwell1.8%138
- Flushingsudden reddening or warmth of the skin1.8%137
- Hyperhidrosisexcessive sweating1.7%131
Top 30 of 656 MedDRA preferred terms recorded across these reports, with a plain-language gloss where one is available. One report can record several terms. The hollow bar is the median share across the 11 drugs in the radiographic contrast agent class; it describes the reports, not the patients. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."
Outcomes recorded
Outcome flags as the reporter set them; a report can carry several, and "other serious" is FDA's own category for serious reports outside the named outcomes. Grey bar: all 26,987 reports in the class. FDA has not verified any outcome and states that the reports "cannot be used to estimate the incidence of these events."
Patients and reporters
Patient age
Patient sex
Who reported
Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 37% of reports give the United States as the country of the event or reporter.
Reason for use recorded
| Indication as recorded (MedDRA) | Reports | Share |
|---|---|---|
| Diagnostic procedure | 982 | 13% |
| Computerised tomogram | 761 | 10.1% |
| Computerised tomogram abdomen | 485 | 6.4% |
| Abdominal pain | 182 | 2.4% |
| Computerised tomogram thorax | 179 | 2.4% |
| Scan with contrast | 94 | 1.2% |
The indication field is filled in by the reporter and is often blank; shares are of all 7,562 reports.
Drugs most often listed in the same reports
| Drug (any role in the report) | Reports | Share of Omnipaque reports |
|---|---|---|
| Aspirin | 111 | 1.5% |
| Metformin | 109 | 1.4% |
| Furosemide | 105 | 1.4% |
| Sodium chloride | 89 | 1.2% |
| Kardegic | 84 | 1.1% |
| Amlodipine | 70 | 0.9% |
| Atorvastatin | 70 | 0.9% |
| Acetaminophen | 63 | 0.8% |
| Pantoprazole | 62 | 0.8% |
| Lansoprazole | 59 | 0.8% |
Other products listed in reports where Omnipaque is a suspect product, whatever their own role. Co-listing means the two were recorded together; it says nothing about either product's part in the event. Only the 2,500 most-reported names are counted here.
In context
| Measure | Omnipaque | Radiographic contrast agent | All reports |
|---|---|---|---|
| Reports as suspect product | 7,562 | 26,987 | 20,646,523 |
| Share of that pool | — | 28% | 0% |
| Reports, latest 12 months | 661 | — | 1,332,454 |
| Marked serious | 80.7% | 77% | 57.4% |
| Death recorded among outcomes, per 1,000 reports | 59 | 63 | 91 |
| Hospitalisation recorded, per 1,000 reports | 302 | 296 | 213 |
| Consumer-filed share | 4.4% | 6.7% | 45.8% |
| Top term, share of reports | Urticaria 13.5% | median 7.2% | 0.8% |
Shares are of reports, not of patients treated. The number of people taking a product is not in the data, so none of these figures is a rate, and differences between columns reflect who takes a product, who reports and how long it has been sold. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic."
Other drugs in the radiographic contrast agent class
| Drug | Name type | Reports | Latest 12 months | Marked serious |
|---|---|---|---|---|
| Ultravist | brand | 7,221 | 470 | 63% |
| Visipaque | brand | 2,877 | 214 | 91.6% |
| Optiray | brand | 2,247 | 56 | 72.8% |
| Ioversol | generic | 1,389 | 54 | 74.5% |
| Iomeron | brand | 1,257 | 301 | 99.8% |
| Isovue | brand | 1,139 | 162 | 56.5% |
| Iopamidol | generic | 1,081 | 89 | 80.9% |
| Lipiodol | brand | 1,069 | 158 | 96.9% |
| Iopromide | generic | 622 | 21 | 94.7% |
| Iohexol | generic | 523 | 47 | 81.5% |
Ordered by report count for navigation only. FDA states that adverse event reports "represent a small percentage of total usage numbers of a product", that "common products may have a higher number of adverse events due to the higher total number of people using the product", and that the data "by themselves are not an indicator of the safety profile of the drug or biologic." A brand and its generic are separate rows because reporters name them separately.
Questions about Omnipaque reports
How many adverse event reports has FDA received for Omnipaque?
7,562 reports list Omnipaque as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 661 of them arrived in the latest 12 months. Another 809 list it only as a concomitant medication.
What reactions are recorded in Omnipaque reports?
urticaria (13.5%), pruritus (11.7%), dyspnoea (10%), sneezing (8.1%) and erythema (7.6%). These are MedDRA preferred terms coded from what the reporter described; a report can list several, and a term's presence is not a finding that Omnipaque was responsible.
How serious are the reports?
80.7% are marked serious by the reporter. Among the outcomes recorded, 5.9% of reports include death and 30.2% include hospitalisation. FDA has not verified these outcomes and states that the reports "cannot be used to estimate the incidence" of the events.
Who files these reports?
other health professional (66%), physician (20.1%) and pharmacist (5.9%). Most reports reach FDA through the manufacturer, which must forward reports it receives.
Are reports for Omnipaque rising?
661 reports in the 12 months to June 2026, close to the 637 of the 12 months before. FDA releases FAERS data quarterly, so the newest months are incomplete and grow in later releases. Counts also move with how many people take a product, its time on the market and publicity.
Do these reports show that Omnipaque was responsible for these reactions?
No. FDA states that "a causal relationship cannot be established between product and reactions listed in a report" and that for any given report "there is no certainty that a suspected drug caused the event." The reaction may relate to the condition being treated, to other medicines, or to something else.
Is this a list of the side effects of Omnipaque?
No. It is a count of what was reported to FDA. The adverse reactions observed in clinical studies are printed on the FDA-approved label, which a pharmacist or clinician can go through with you.
How do I report an adverse event?
Consumers and health professionals can report to FDA through MedWatch (Form FDA 3500 online, or 1-800-FDA-1088), or to the manufacturer, which must pass reports on. See the guide on how to report.
Where this comes from. Counts are built from the openFDA Drug Adverse Event (FAERS) bulk export released 28 Sep 2026, which holds reports FDA received through 30 Jun 2026. Drug names are as reported, resolved to the brand or generic name on the FDA label where openFDA's harmonisation matched them; classes are the pharmacologic class (EPC) from the label and the National Drug Code Directory of 17 Sep 2026. A report counts here when it lists Omnipaque as a suspect or interacting product; reports listing it only as a concomitant medication (809) are excluded. No report narrative, lot number, patient detail or reporter identity is published. See the methodology and sources; FDA's record is authoritative, and corrections are handled within five working days.
Drug data (FAERS) through 30 Jun 2026; device data (MAUDE) through 31 Aug 2026. Not medical advice.