Drugs › Histamine-1 receptor antagonist
Brand name · Fexofenadine hydrochloride and pseudoephedrine hydrochloride
Allegra-D: adverse event reports filed with FDA
1,414 reports list it as a suspect or interacting product, 2004–2026. Class: Histamine-1 receptor antagonist. Also reported as Allegra-D /01367401/.
- 1,414
- reports as suspect product
- 0% of all reports · about 63 a year
- 21
- reports, 12 months to June 2026
- 14 in the 12 months before
- 11.7%
- marked serious by the reporter
- 57.7% across the class
- 0.5%
- record death among outcomes, as reported
- 7 reports · not verified by FDA
1,414 adverse event reports received by FDA list the brand name Allegra-D (fexofenadine hydrochloride and pseudoephedrine hydrochloride) as a suspect or interacting product, from February 2004 to May 2026. A further 2,053 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, 21 reports listed it, up 50% from 14 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 63 reports a year and 0% of the 20,646,523 reports in the database, and 1% of the reports for the histamine-1 receptor antagonist class. How many people take it is not in the data, so a count is not a rate of occurrence.
Reporters most often recorded drug ineffective (27.1%), insomnia (13%) and medication residue present (9.3%). A report can list several reactions, so shares add to more than 100%; 221 different terms appear across these reports. Drug ineffective is recorded in 27.1% of these reports, a larger share than in the median histamine-1 receptor antagonist drug (15.9%).
11.7% of the reports are marked serious by the reporter (57.7% across the class); 0.5% record death among the outcomes and 2.1% record hospitalisation, as reported. 94.4% of the reports came from consumers, and the largest patient age group is 45 to 64 (15.1%). 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 Allegra-D reports recording the termmedian drug in histamine-1 receptor antagonist
- Drug ineffectivethe medicine did not work as expected27.1%383
- Insomniadifficulty sleeping13%184
- Medication residue present9.3%131
- Feeling abnormalfeeling odd or not right5.7%80
- Therapeutic response decreasedthe medicine worked less well4%56
- Extra dose administered3.8%54
- Headachehead pain3.5%50
- Dizzinesslight-headedness or unsteadiness3.1%44
- Dyspnoeashortness of breath2.7%38
- Somnolencedrowsiness2.4%34
- Malaisegeneral feeling of being unwell2.3%33
- Nervousnessnervousness2.1%30
- Dry mouthdry mouth2.1%29
- Fatiguetiredness2%28
- Nauseafeeling sick2%28
- Sleep disordera sleep problem1.7%24
- Coughcough1.6%23
- Wrong technique in drug usage processthe medicine was used in the wrong way1.6%23
- Feeling jittery1.5%21
- Condition aggravatedthe condition being treated got worse1.4%20
- Heart rate increaseda fast heart rate reading1.4%20
- Hypersensitivityan allergic-type reaction1.4%20
- Anxietyanxiety1.3%18
- Drug hypersensitivityan allergic-type reaction to a medicine1.3%18
- Blood pressure increaseda raised blood pressure reading1.2%17
- Abdominal discomfortstomach discomfort1.1%16
- Abdominal pain upperupper stomach pain1.1%16
- Palpitationsawareness of the heartbeat1.1%16
- Unevaluable eventthe event could not be assessed1.1%15
- Adverse eventan unwanted medical event, type not specified1%14
Top 30 of 221 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 34 drugs in the histamine-1 receptor antagonist 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 135,666 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. 95.7% of reports give the United States as the country of the event or reporter.
Reason for use recorded
| Indication as recorded (MedDRA) | Reports | Share |
|---|---|---|
| Hypersensitivity | 200 | 14.1% |
| Multiple allergies | 152 | 10.7% |
| Nasal congestion | 42 | 3% |
| Seasonal allergy | 24 | 1.7% |
| Rhinorrhoea | 18 | 1.3% |
| Sinusitis | 16 | 1.1% |
The indication field is filled in by the reporter and is often blank; shares are of all 1,414 reports.
In context
| Measure | Allegra-D | Histamine-1 receptor antagonist | All reports |
|---|---|---|---|
| Reports as suspect product | 1,414 | 135,666 | 20,646,523 |
| Share of that pool | — | 1% | 0% |
| Reports, latest 12 months | 21 | — | 1,332,454 |
| Marked serious | 11.7% | 57.7% | 57.4% |
| Death recorded among outcomes, per 1,000 reports | 5 | 190 | 91 |
| Hospitalisation recorded, per 1,000 reports | 21 | 203 | 213 |
| Consumer-filed share | 94.4% | 50.8% | 45.8% |
| Top term, share of reports | Drug ineffective 27.1% | median 15.9% | 6.3% |
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 histamine-1 receptor antagonist class
| Drug | Name type | Reports | Latest 12 months | Marked serious |
|---|---|---|---|---|
| Zyrtec | brand | 20,342 | 929 | 16.7% |
| Cetirizine hydrochloride | generic | 19,092 | 2,043 | 77.5% |
| Diphenhydramine | generic | 15,339 | 1,157 | 96% |
| Cetirizine | generic | 12,522 | 1,548 | 91.7% |
| Benadryl | brand | 9,612 | 432 | 66.6% |
| Allegra Allergy | brand | 7,868 | 304 | 3.6% |
| Diphenhydramine hydrochloride | generic | 5,556 | 538 | 94.6% |
| Xyzal Allergy 24HR | brand | 5,302 | 147 | 3.3% |
| Cetirizine hydrochloride, pseudoephedrine hydrochloride | generic | 4,914 | 909 | 99.3% |
| Xyzal | brand | 3,824 | 181 | 44.6% |
| Fexofenadine | generic | 3,142 | 335 | 62.5% |
| Diphenhydramine hcl | generic | 2,741 | 0 | 91% |
| Desloratadine | generic | 2,699 | 190 | 93.6% |
| Azelastine hydrochloride | generic | 2,502 | 151 | 5.7% |
| Aleve PM | brand | 1,877 | 13 | 6.4% |
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 Allegra-D reports
How many adverse event reports has FDA received for Allegra-D?
1,414 reports list Allegra-D as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 21 of them arrived in the latest 12 months. Another 2,053 list it only as a concomitant medication.
What reactions are recorded in Allegra-D reports?
drug ineffective (27.1%), insomnia (13%), medication residue present (9.3%), feeling abnormal (5.7%) and therapeutic response decreased (4%). 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 Allegra-D was responsible.
How serious are the reports?
11.7% are marked serious by the reporter. Among the outcomes recorded, 0.5% of reports include death and 2.1% 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 (94.4%), physician (1.8%) and other health professional (1.6%). Most reports reach FDA through the manufacturer, which must forward reports it receives.
Are reports for Allegra-D rising?
21 reports in the 12 months to June 2026, up 50% from 14 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 Allegra-D 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 Allegra-D?
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 Allegra-D as a suspect or interacting product; reports listing it only as a concomitant medication (2,053) 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.