Reported Reactions

Drugs › Hedgehog pathway inhibitor

Brand name · Vismodegib

Erivedge: adverse event reports filed with FDA

7,857 reports list it as a suspect or interacting product, 2012–2026. Class: Hedgehog pathway inhibitor.

7,857
reports as suspect product
0% of all reports · about 555 a year
282
reports, 12 months to June 2026
452 in the 12 months before
36.9%
marked serious by the reporter
42.3% across the class
10.7%
record death among outcomes, as reported
841 reports · not verified by FDA

7,857 adverse event reports received by FDA list the brand name Erivedge (vismodegib) as a suspect or interacting product, from May 2012 to June 2026. A further 106 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, 282 reports listed it, down 38% from 452 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 555 reports a year and 0% of the 20,646,523 reports in the database, and 80.7% of the reports for the hedgehog pathway inhibitor class. How many people take it is not in the data, so a count is not a rate of occurrence.

Reporters most often recorded muscle spasms (24.8%), alopecia (16.7%) and ageusia (12.7%). A report can list several reactions, so shares add to more than 100%; 487 different terms appear across these reports. Muscle spasms is recorded in 24.8% of these reports, a larger share than in the median hedgehog pathway inhibitor drug (12.7%).

36.9% of the reports are marked serious by the reporter (42.3% across the class); 10.7% record death among the outcomes and 9.4% record hospitalisation, as reported. 57% of the reports came from consumers, and the largest patient age group is 75 and over (19.8%). 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

0222444Jul 2021: 27Aug 2021: 26Sep 2021: 21Oct 2021: 15Nov 2021: 22Dec 2021: 212022Jan 2022: 11Feb 2022: 39Mar 2022: 441Apr 2022: 35May 2022: 17Jun 2022: 15Jul 2022: 21Aug 2022: 31Sep 2022: 21Oct 2022: 34Nov 2022: 25Dec 2022: 282023Jan 2023: 25Feb 2023: 15Mar 2023: 444Apr 2023: 16May 2023: 25Jun 2023: 20Jul 2023: 17Aug 2023: 26Sep 2023: 24Oct 2023: 7Nov 2023: 13Dec 2023: 112024Jan 2024: 9Feb 2024: 10Mar 2024: 268Apr 2024: 10May 2024: 22Jun 2024: 27Jul 2024: 64Aug 2024: 55Sep 2024: 46Oct 2024: 33Nov 2024: 42Dec 2024: 252025Jan 2025: 32Feb 2025: 25Mar 2025: 35Apr 2025: 35May 2025: 44Jun 2025: 16Jul 2025: 23Aug 2025: 17Sep 2025: 24Oct 2025: 30Nov 2025: 20Dec 2025: 282026Jan 2026: 18Feb 2026: 19Mar 2026: 26Apr 2026: 33May 2026: 25Jun 2026: 19

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

06931,3852012: 3820122013: 1422014: 18620142015: 3942016: 44920162017: 1,3852018: 81120182019: 7262020: 65820202021: 6272022: 71820222023: 6432024: 61120242025: 3292026: 1402026

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Erivedge reports recording the termmedian drug in hedgehog pathway inhibitor

  1. Muscle spasmsmuscle cramps24.8%1,946
  2. Alopeciahair loss16.7%1,314
  3. Ageusialoss of taste12.7%995
  4. Fatiguetiredness11.4%896
  5. Deaththe patient died; cause not stated by this term8.8%695
  6. Weight decreasedweight loss8.7%682
  7. Dysgeusiaaltered taste8.5%669
  8. Nauseafeeling sick8.3%653
  9. Decreased appetitereduced appetite8.3%652
  10. Diarrhoealoose or frequent stools5.5%433
  11. Constipationconstipation4.6%363
  12. Off label useused for a purpose or in a way not on the label4.3%340
  13. Astheniaweakness or lack of energy3.4%271
  14. Arthralgiajoint pain3.4%269
  15. No adverse eventno adverse event was reported3.3%256
  16. Painpain, site not specified2.8%220
  17. Vomitingbeing sick2.6%204
  18. Myalgiamuscle pain2.5%195
  19. Drug ineffectivethe medicine did not work as expected2.1%164
  20. Headachehead pain2.1%164
  21. Malaisegeneral feeling of being unwell2%154
  22. Falla fall1.6%127
  23. Rashskin rash1.6%127
  24. Abdominal pain upperupper stomach pain1.5%118
  25. Dizzinesslight-headedness or unsteadiness1.4%113
  26. Insomniadifficulty sleeping1.3%101
  27. Intentional product use issuedeliberate use not as intended1.3%101
  28. Pruritusitching1.2%93

Top 30 of 487 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 hedgehog pathway 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

Death10.7%841
Life-threatening0.5%42
Hospitalisation (initial or prolonged)9.4%737
Disability0.8%59
Congenital anomaly0%1
Other serious18%1,414
Not serious63.1%4,955

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 9,739 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%3
2 to 110%0
12 to 170%3
18 to 442%161
45 to 6410%783
65 to 749.6%758
75 and over19.8%1,556
Age not given58.5%4,593

Patient sex

Female36.9%2,897
Male56.3%4,425
Not given6.8%535

Who reported

Physician24%1,884
Pharmacist4.6%365
Other health professional13.1%1,031
Lawyer0%2
Consumer or non-health professional57%4,476
Not given1.3%99

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 93.5% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Basal cell carcinoma5,00863.7%
Skin cancer4165.3%
Neoplasm malignant971.2%
Basal cell naevus syndrome921.2%
Congenital anomaly490.6%
Malignant melanoma300.4%

The indication field is filled in by the reporter and is often blank; shares are of all 7,857 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Erivedge reports
Lisinopril3023.8%
Aspirin2653.4%
Atorvastatin2493.2%
Amlodipine2112.7%
Gabapentin1942.5%
Furosemide1932.5%
Omeprazole1902.4%
Simvastatin1882.4%
Metoprolol1481.9%
Levothyroxine1371.7%

Other products listed in reports where Erivedge 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

MeasureErivedgeHedgehog pathway inhibitorAll reports
Reports as suspect product7,8579,73920,646,523
Share of that pool—80.7%0%
Reports, latest 12 months282—1,332,454
Marked serious36.9%42.3%57.4%
Death recorded among outcomes, per 1,000 reports10710991
Hospitalisation recorded, per 1,000 reports94129213
Consumer-filed share57%51.8%45.8%
Top term, share of reportsMuscle spasms 24.8%median 12.7%0.9%

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 hedgehog pathway inhibitor class

DrugName typeReportsLatest 12 monthsMarked serious
Odomzobrand1,02524642.9%
Vismodegibgeneric8572290.7%

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 Erivedge reports

How many adverse event reports has FDA received for Erivedge?

7,857 reports list Erivedge as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 282 of them arrived in the latest 12 months. Another 106 list it only as a concomitant medication.

What reactions are recorded in Erivedge reports?

muscle spasms (24.8%), alopecia (16.7%), ageusia (12.7%), fatigue (11.4%) and death (8.8%). 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 Erivedge was responsible.

How serious are the reports?

36.9% are marked serious by the reporter. Among the outcomes recorded, 10.7% of reports include death and 9.4% 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 (57%), physician (24%) and other health professional (13.1%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Erivedge rising?

282 reports in the 12 months to June 2026, down 38% from 452 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 Erivedge 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 Erivedge?

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 Erivedge as a suspect or interacting product; reports listing it only as a concomitant medication (106) 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.