Generic name
Estradiol hemihydrate: adverse event reports filed with FDA
480 reports list it as a suspect or interacting product, 2012–2026.
- 480
- reports as suspect product
- 0% of all reports · about 35 a year
- 16
- reports, 12 months to June 2026
- 16 in the 12 months before
- 42.1%
- marked serious by the reporter
- 57.4% across all reports
- 5.8%
- record death among outcomes, as reported
- 28 reports · not verified by FDA
Between September 2012 and June 2026, 480 adverse event reports received by FDA list estradiol hemihydrate, a generic name as a suspect or interacting product. Reports that mention it only as a concomitant medication (76) are left out of every figure here.
In the 12 months to June 2026, 16 reports listed it, close to the 16 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 35 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.
Reporters most often recorded product adhesion issue (26%), device adhesion issue (9.8%) and hot flush (9.8%). A report can list several reactions, so shares add to more than 100%; 142 different terms appear across these reports. Product adhesion issue is recorded in 26% of these reports, against 0.2% of all reports in the database.
42.1% of the reports are marked serious by the reporter; 5.8% record death among the outcomes and 17.7% record hospitalisation, as reported. 54.8% of the reports came from consumers, and the largest patient age group is 45 to 64 (41%). 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 Estradiol hemihydrate reports recording the termall reports in the database
- Product adhesion issue26%125
- Device adhesion issue9.8%47
- Hot flusha hot flush9.8%47
- Drug ineffectivethe medicine did not work as expected7.5%36
- Product dose omission issuea dose was missed5.8%28
- Application site rash5.4%26
- Wrong technique in product usage processthe product was used in the wrong way5%24
- Incorrect dose administered by devicethe device gave the wrong dose4.6%22
- Application site pruritusitching where the product was applied4%19
- Deaththe patient died; cause not stated by this term3.8%18
- Application site erythemaredness where the product was applied3.5%17
- Headachehead pain2.9%14
- Product physical issuea physical defect in the product2.7%13
- Covid-19COVID-19 infection2.5%12
- Product dose omissiona dose was missed2.3%11
- Rashskin rash2.3%11
- Feeling abnormalfeeling odd or not right2.1%10
- Foetal exposure during pregnancythe unborn baby was exposed to the medicine1.9%9
- Insomniadifficulty sleeping1.9%9
- Premature babya baby born early1.9%9
- Hypospadias1.7%8
- Incorrect dose administeredthe wrong dose was given1.7%8
- Night sweatssweating at night1.5%7
- Ovarian hyperstimulation syndrome1.5%7
- Palpitationsawareness of the heartbeat1.5%7
- Product use issuea problem in how the product was used1.5%7
- Small for dates baby1.5%7
- Alopeciahair loss1.3%6
- Irritabilityirritability1.3%6
Top 30 of 142 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. 60.4% of reports give the United States as the country of the event or reporter.
Reason for use recorded
| Indication as recorded (MedDRA) | Reports | Share |
|---|---|---|
| Hormone replacement therapy | 78 | 16.3% |
| Hormone therapy | 17 | 3.5% |
| Hot flush | 12 | 2.5% |
| Assisted reproductive technology | 7 | 1.5% |
| Assisted fertilisation | 5 | 1% |
| Gender dysphoria | 3 | 0.6% |
The indication field is filled in by the reporter and is often blank; shares are of all 480 reports.
In context
| Measure | Estradiol hemihydrate | All reports |
|---|---|---|
| Reports as suspect product | 480 | 20,646,523 |
| Share of that pool | — | 0% |
| Reports, latest 12 months | 16 | 1,332,454 |
| Marked serious | 42.1% | 57.4% |
| Death recorded among outcomes, per 1,000 reports | 58 | 91 |
| Hospitalisation recorded, per 1,000 reports | 177 | 213 |
| Consumer-filed share | 54.8% | 45.8% |
| Top term, share of reports | Product adhesion issue 26% | 0.2% |
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 Estradiol hemihydrate reports
How many adverse event reports has FDA received for Estradiol hemihydrate?
480 reports list Estradiol hemihydrate as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 16 of them arrived in the latest 12 months. Another 76 list it only as a concomitant medication.
What reactions are recorded in Estradiol hemihydrate reports?
product adhesion issue (26%), device adhesion issue (9.8%), hot flush (9.8%), drug ineffective (7.5%) and product dose omission issue (5.8%). 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 Estradiol hemihydrate was responsible.
How serious are the reports?
42.1% are marked serious by the reporter. Among the outcomes recorded, 5.8% of reports include death and 17.7% 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?
consumer or non-health professional (54.8%), other health professional (29.8%) and physician (10.6%). Most reports reach FDA through the manufacturer, which must forward reports it receives.
Are reports for Estradiol hemihydrate rising?
16 reports in the 12 months to June 2026, close to the 16 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 Estradiol hemihydrate 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 Estradiol hemihydrate?
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 Estradiol hemihydrate as a suspect or interacting product; reports listing it only as a concomitant medication (76) 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.