Generic name
Potassium iodide: adverse event reports filed with FDA
627 reports list it as a suspect or interacting product, 2004–2026.
- 627
- reports as suspect product
- 0% of all reports · about 29 a year
- 30
- reports, 12 months to June 2026
- 143 in the 12 months before
- 96.2%
- marked serious by the reporter
- 57.4% across all reports
- 50.4%
- record death among outcomes, as reported
- 316 reports · not verified by FDA
Between July 2004 and May 2026, 627 adverse event reports received by FDA list potassium iodide, a generic name as a suspect or interacting product. Reports that mention it only as a concomitant medication (775) are left out of every figure here.
In the 12 months to June 2026, 30 reports listed it, down 79% from 143 in 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 29 reports a year and 0% of the 20,646,523 reports in the database. 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 haemorrhagic stroke (40.4%), cardio-respiratory arrest (37.3%) and altered state of consciousness (36.7%). A report can list several reactions, so shares add to more than 100%; 157 different terms appear across these reports. Haemorrhagic stroke is recorded in 40.4% of these reports, against 0% of all reports in the database.
96.2% of the reports are marked serious by the reporter; 50.4% record death among the outcomes and 17.9% record hospitalisation, as reported. 71.3% of the reports came from other health professionals, and the largest patient age group is 45 to 64 (19.5%). 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 Potassium iodide reports recording the termall reports in the database
- Haemorrhagic stroke40.4%253
- Cardio-respiratory arrestthe heart and breathing stopped37.3%234
- Altered state of consciousness36.7%230
- Sepsisa severe body-wide response to infection36.2%227
- Tachycardiafast heart rate36.2%227
- Ocular discomfort34.4%216
- Ascitesfluid in the abdomen34.3%215
- Dyspnoeashortness of breath34.3%215
- Haematemesis34.3%215
- Amaurosis fugax34.1%214
- Blindnessloss of sight34%213
- Chillschills or shivering34%213
- Diarrhoealoose or frequent stools34%213
- Falla fall33.8%212
- Pruritusitching33.8%212
- Arthralgiajoint pain33.7%211
- Coma33.7%211
- Dizzinesslight-headedness or unsteadiness33.7%211
- Insomniadifficulty sleeping33.7%211
- Head discomfortdiscomfort in the head33.3%209
- Eye paineye pain33.2%208
- Coughcough31.9%200
- Headachehead pain31.6%198
- Fatiguetiredness31.1%195
- Blood pressure increaseda raised blood pressure reading30.6%192
- Decreased appetitereduced appetite30.6%192
- Generalised oedema30.3%190
- Myalgiamuscle pain30.3%190
- Somnolencedrowsiness30.3%190
- Haematuriablood in the urine30.1%189
Top 30 of 157 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 share of all reports in the database; 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 20,646,523 reports. 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. 22.8% of reports give the United States as the country of the event or reporter.
Reason for use recorded
| Indication as recorded (MedDRA) | Reports | Share |
|---|---|---|
| Thyrotoxic crisis | 55 | 8.8% |
| Hyperthyroidism | 39 | 6.2% |
| Pneumonia | 16 | 2.6% |
| Nutritional supplementation | 13 | 2.1% |
| Hypertension | 11 | 1.8% |
| Basedow's disease | 10 | 1.6% |
The indication field is filled in by the reporter and is often blank; shares are of all 627 reports.
In context
| Measure | Potassium iodide | All reports |
|---|---|---|
| Reports as suspect product | 627 | 20,646,523 |
| Share of that pool | — | 0% |
| Reports, latest 12 months | 30 | 1,332,454 |
| Marked serious | 96.2% | 57.4% |
| Death recorded among outcomes, per 1,000 reports | 504 | 91 |
| Hospitalisation recorded, per 1,000 reports | 179 | 213 |
| Consumer-filed share | 7.7% | 45.8% |
| Top term, share of reports | Haemorrhagic stroke 40.4% | 0% |
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."
Questions about Potassium iodide reports
How many adverse event reports has FDA received for Potassium iodide?
627 reports list Potassium iodide as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 30 of them arrived in the latest 12 months. Another 775 list it only as a concomitant medication.
What reactions are recorded in Potassium iodide reports?
haemorrhagic stroke (40.4%), cardio-respiratory arrest (37.3%), altered state of consciousness (36.7%), sepsis (36.2%) and tachycardia (36.2%). 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 Potassium iodide was responsible.
How serious are the reports?
96.2% are marked serious by the reporter. Among the outcomes recorded, 50.4% of reports include death and 17.9% 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 (71.3%), physician (16.9%) and consumer or non-health professional (7.7%). Most reports reach FDA through the manufacturer, which must forward reports it receives.
Are reports for Potassium iodide rising?
30 reports in the 12 months to June 2026, down 79% from 143 in 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 Potassium iodide 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 Potassium iodide?
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 Potassium iodide as a suspect or interacting product; reports listing it only as a concomitant medication (775) 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.