Reported Reactions

Drugs › Influenza A M2 protein inhibitor

Brand name · Amantadine

Gocovri: adverse event reports filed with FDA

1,633 reports list it as a suspect or interacting product, 2017–2026. Class: Influenza A M2 protein inhibitor.

1,633
reports as suspect product
0% of all reports · about 183 a year
75
reports, 12 months to June 2026
61 in the 12 months before
44%
marked serious by the reporter
67.8% across the class
11.5%
record death among outcomes, as reported
187 reports · not verified by FDA

1,633 adverse event reports received by FDA list the brand name Gocovri (amantadine) as a suspect or interacting product, from August 2017 to June 2026. A further 1,168 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, 75 reports listed it, up 23% from 61 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 183 reports a year and 0% of the 20,646,523 reports in the database, and 35.7% of the reports for the influenza A M2 protein inhibitor class. How many people take it is not in the data, so a count is not a rate of occurrence.

The MedDRA terms listed most often are fall (19%), hallucination (14.8%) and dizziness (12.5%). A report can list several reactions, so shares add to more than 100%; 428 different terms appear across these reports. Fall is recorded in 19% of these reports, a larger share than in the median influenza A M2 protein inhibitor drug (8.3%).

44% of the reports are marked serious by the reporter (67.8% across the class); 11.5% record death among the outcomes and 24.7% record hospitalisation, as reported. 66.4% of the reports came from consumers, and the largest patient age group is 65 to 74 (26.7%). 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

076152Jul 2021: 32Aug 2021: 17Sep 2021: 33Oct 2021: 106Nov 2021: 14Dec 2021: 202022Jan 2022: 16Feb 2022: 25Mar 2022: 12Apr 2022: 12May 2022: 7Jun 2022: 6Jul 2022: 3Aug 2022: 5Sep 2022: 6Oct 2022: 152Nov 2022: 6Dec 2022: 222023Jan 2023: 2Feb 2023: 3Mar 2023: 8Apr 2023: 0May 2023: 3Jun 2023: 5Jul 2023: 2Aug 2023: 1Sep 2023: 2Oct 2023: 50Nov 2023: 2Dec 2023: 42024Jan 2024: 0Feb 2024: 5Mar 2024: 2Apr 2024: 5May 2024: 5Jun 2024: 4Jul 2024: 2Aug 2024: 2Sep 2024: 3Oct 2024: 20Nov 2024: 5Dec 2024: 32025Jan 2025: 7Feb 2025: 5Mar 2025: 2Apr 2025: 4May 2025: 1Jun 2025: 7Jul 2025: 9Aug 2025: 2Sep 2025: 22Oct 2025: 8Nov 2025: 7Dec 2025: 42026Jan 2026: 2Feb 2026: 2Mar 2026: 7Apr 2026: 3May 2026: 4Jun 2026: 5

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

01833662017: 320172018: 24320182019: 26520192020: 24520202021: 36620212022: 27220222023: 8220232024: 5620242025: 7820252026: 232026

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Gocovri reports recording the termmedian drug in influenza a m2 protein inhibitor

  1. Falla fall19%311
  2. Hallucinationseeing or hearing things that are not there14.8%242
  3. Dizzinesslight-headedness or unsteadiness12.5%204
  4. Dyskinesiainvoluntary movements10.6%173
  5. Dry mouthdry mouth10.2%167
  6. Tremorshaking8.6%140
  7. Constipationconstipation8.2%134
  8. Insomniadifficulty sleeping8.1%133
  9. Fatiguetiredness8%131
  10. Deaththe patient died; cause not stated by this term7.6%124
  11. Balance disorderproblems with balance7.5%122
  12. Confusional stateconfusion6.9%112
  13. Gait disturbancedifficulty walking6.8%111
  14. Somnolencedrowsiness6.4%104
  15. Peripheral swellingswelling of the arms or legs6.2%101
  16. Drug ineffectivethe medicine did not work as expected5.9%97
  17. Nauseafeeling sick5.6%91
  18. Astheniaweakness or lack of energy5.5%89
  19. Product dose omission issuea dose was missed4.9%80
  20. Urinary tract infectionbladder or urinary infection4.8%78
  21. Feeling abnormalfeeling odd or not right4.1%67
  22. Anxietyanxiety3.9%63
  23. Weight decreasedweight loss3.7%60
  24. Product dose omissiona dose was missed3.4%56
  25. Vision blurredblurred vision3.4%55
  26. Hypotensionlow blood pressure3.2%52
  27. Decreased appetitereduced appetite2.9%48
  28. Malaisegeneral feeling of being unwell2.9%47

Top 30 of 428 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 3 drugs in the influenza a m2 protein inhibitor 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

Death11.5%187
Life-threatening0.1%1
Hospitalisation (initial or prolonged)24.7%403
Disability0.1%2
Congenital anomaly0%0
Other serious20.9%342
Not serious56%915

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 4,578 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

Under 20%0
2 to 110%0
12 to 170%0
18 to 440.6%10
45 to 6413.3%218
65 to 7426.7%436
75 and over24.1%393
Age not given35.3%576

Patient sex

Female52.2%852
Male41.9%684
Not given5.9%97

Who reported

Physician6.6%108
Pharmacist10.8%176
Other health professional12.1%198
Lawyer0%0
Consumer or non-health professional66.4%1,084
Not given4.1%67

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 96.4% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Dyskinesia85452.3%
Parkinson's disease20612.6%
Tardive dyskinesia80.5%
Dystonia30.2%
On and off phenomenon20.1%

The indication field is filled in by the reporter and is often blank; shares are of all 1,633 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Gocovri reports
Rytary37523%
Carbidopa levodopa28217.3%
Sinemet23714.5%
Carbidopa and levodopa22814%
Ergocalciferol20512.6%
Gabapentin16810.3%
Aspirin1619.9%
Atorvastatin1489.1%
Clonazepam1448.8%
Melatonin1358.3%

Other products listed in reports where Gocovri 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

MeasureGocovriInfluenza A M2 protein inhibitorAll reports
Reports as suspect product1,6334,57820,646,523
Share of that pool—35.7%0%
Reports, latest 12 months75—1,332,454
Marked serious44%67.8%57.4%
Death recorded among outcomes, per 1,000 reports1159591
Hospitalisation recorded, per 1,000 reports247340213
Consumer-filed share66.4%40.3%45.8%
Top term, share of reportsFall 19%median 8.3%1.6%

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 influenza a m2 protein inhibitor class

DrugName typeReportsLatest 12 monthsMarked serious
Amantadinegeneric2,20520082%
Amantadine hydrochloridegeneric7408178.1%

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 Gocovri reports

How many adverse event reports has FDA received for Gocovri?

1,633 reports list Gocovri as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 75 of them arrived in the latest 12 months. Another 1,168 list it only as a concomitant medication.

What reactions are recorded in Gocovri reports?

fall (19%), hallucination (14.8%), dizziness (12.5%), dyskinesia (10.6%) and dry mouth (10.2%). 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 Gocovri was responsible.

How serious are the reports?

44% are marked serious by the reporter. Among the outcomes recorded, 11.5% of reports include death and 24.7% 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 (66.4%), other health professional (12.1%) and pharmacist (10.8%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Gocovri rising?

75 reports in the 12 months to June 2026, up 23% from 61 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 Gocovri 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 Gocovri?

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 Gocovri as a suspect or interacting product; reports listing it only as a concomitant medication (1,168) 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.