Reported Reactions

Drugs › HMG-CoA reductase inhibitor

Brand name · Simvastatin

Zocor: adverse event reports filed with FDA

10,348 reports list it as a suspect or interacting product, 2004–2026. Class: HMG-CoA reductase inhibitor. Also reported as Zocor 10mg, Zocor Tablet, Zocor 20mg.

10,348
reports as suspect product
0.1% of all reports · about 460 a year
108
reports, 12 months to June 2026
85 in the 12 months before
75%
marked serious by the reporter
74% across the class
8%
record death among outcomes, as reported
825 reports · not verified by FDA

10,348 adverse event reports received by FDA list the brand name Zocor (simvastatin) as a suspect or interacting product, from January 2004 to June 2026. A further 37,296 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, 108 reports listed it, up 27% from 85 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 460 reports a year and 0.1% of the 20,646,523 reports in the database, and 5.1% of the reports for the HMG-CoA reductase inhibitor class. 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 myalgia (14.7%), rhabdomyolysis (13.2%) and drug hypersensitivity (10.1%). A report can list several reactions, so shares add to more than 100%; 1,308 different terms appear across these reports. Myalgia is recorded in 14.7% of these reports, about the same share as in the median HMG-CoA reductase inhibitor drug (13.7%).

75% of the reports are marked serious by the reporter (74% across the class); 8% record death among the outcomes and 36.3% record hospitalisation, as reported. 29.5% of the reports came from other health professionals, and the largest patient age group is 45 to 64 (25.1%). 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

01632Jul 2021: 17Aug 2021: 25Sep 2021: 32Oct 2021: 15Nov 2021: 20Dec 2021: 242022Jan 2022: 9Feb 2022: 8Mar 2022: 12Apr 2022: 18May 2022: 16Jun 2022: 15Jul 2022: 8Aug 2022: 16Sep 2022: 10Oct 2022: 12Nov 2022: 13Dec 2022: 182023Jan 2023: 16Feb 2023: 10Mar 2023: 9Apr 2023: 7May 2023: 13Jun 2023: 15Jul 2023: 7Aug 2023: 16Sep 2023: 8Oct 2023: 15Nov 2023: 3Dec 2023: 122024Jan 2024: 2Feb 2024: 4Mar 2024: 9Apr 2024: 3May 2024: 6Jun 2024: 7Jul 2024: 4Aug 2024: 2Sep 2024: 6Oct 2024: 8Nov 2024: 7Dec 2024: 142025Jan 2025: 12Feb 2025: 2Mar 2025: 3Apr 2025: 5May 2025: 0Jun 2025: 22Jul 2025: 13Aug 2025: 6Sep 2025: 3Oct 2025: 22Nov 2025: 15Dec 2025: 42026Jan 2026: 7Feb 2026: 5Mar 2026: 6Apr 2026: 6May 2026: 9Jun 2026: 12

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

05461,0912004: 77120042005: 1,0912006: 8572007: 61720072008: 6232009: 4252010: 60120102011: 5682012: 9442013: 52820132014: 4232015: 4002016: 47320162017: 3332018: 2942019: 36820192020: 2442021: 2782022: 15520222023: 1312024: 722025: 10720252026: 45

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Zocor reports recording the termmedian drug in hmg-coa reductase inhibitor

  1. Myalgiamuscle pain14.7%1,526
  2. Rhabdomyolysismuscle breakdown13.2%1,365
  3. Drug hypersensitivityan allergic-type reaction to a medicine10.1%1,045
  4. Astheniaweakness or lack of energy5.7%588
  5. Drug interactionan interaction between medicines5.2%538
  6. Pain in extremitypain in an arm or leg5.2%535
  7. Muscle spasmsmuscle cramps5.1%529
  8. Nauseafeeling sick5.1%528
  9. Muscular weaknessmuscle weakness4.8%498
  10. Arthralgiajoint pain4.7%483
  11. Fatiguetiredness4.6%478
  12. Drug ineffectivethe medicine did not work as expected4.6%472
  13. Painpain, site not specified4.5%464
  14. Dyspnoeashortness of breath4%412
  15. Vomitingbeing sick3.4%348
  16. Abdominal painstomach or belly pain3%313
  17. Headachehead pain2.9%303
  18. Dizzinesslight-headedness or unsteadiness2.7%276
  19. Myocardial infarctionheart attack2.6%273
  20. Blood cholesterol increasedraised cholesterol2.6%271
  21. Constipationconstipation2.6%268
  22. Hypertensionhigh blood pressure2.6%265
  23. Myopathy2.5%259
  24. Diarrhoealoose or frequent stools2.5%258
  25. Malaisegeneral feeling of being unwell2.5%258
  26. Off label useused for a purpose or in a way not on the label2.4%252
  27. Back painback pain2.4%247
  28. Oedema peripheralswelling of the legs, ankles or hands2.3%239

Top 30 of 1,308 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 13 drugs in the hmg-coa reductase 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

Death8%825
Life-threatening9.4%975
Hospitalisation (initial or prolonged)36.3%3,756
Disability14.8%1,530
Congenital anomaly1%101
Other serious39.7%4,107
Not serious25%2,589

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 204,462 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%2
2 to 110.1%6
12 to 170.1%12
18 to 444.1%422
45 to 6425.1%2,597
65 to 7418%1,860
75 and over18.9%1,957
Age not given33.7%3,492

Patient sex

Female46.5%4,816
Male46.1%4,768
Not given7.4%764

Who reported

Physician27.8%2,875
Pharmacist4.8%500
Other health professional29.5%3,050
Lawyer1.4%145
Consumer or non-health professional28.2%2,920
Not given8.3%858

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 56.1% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Blood cholesterol increased1,68316.3%
Hypercholesterolaemia1,11610.8%
Hyperlipidaemia7707.4%
Blood cholesterol2702.6%
Dyslipidaemia1651.6%
Blood cholesterol abnormal870.8%

The indication field is filled in by the reporter and is often blank; shares are of all 10,348 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Zocor reports
Aspirin1,54915%
Lipitor9058.7%
Allopurinol4754.6%
Furosemide4624.5%
Acetaminophen4304.2%
Simvastatin3873.7%
Atenolol3783.7%
Omeprazole3703.6%
Plavix3633.5%
Crestor3453.3%

Other products listed in reports where Zocor 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

MeasureZocorHMG-CoA reductase inhibitorAll reports
Reports as suspect product10,348204,46220,646,523
Share of that pool—5.1%0.1%
Reports, latest 12 months108—1,332,454
Marked serious75%74%57.4%
Death recorded among outcomes, per 1,000 reports806591
Hospitalisation recorded, per 1,000 reports363246213
Consumer-filed share28.2%35.7%45.8%
Top term, share of reportsMyalgia 14.7%median 13.7%0.8%

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 hmg-coa reductase inhibitor class

DrugName typeReportsLatest 12 monthsMarked serious
Lipitorbrand55,17235671.8%
Crestorbrand44,25968157.6%
Simvastatingeneric35,5011,03288.7%
Rosuvastatingeneric20,1832,91688.3%
Atorvastatin calciumgeneric20,12059569%
Rosuvastatin calciumgeneric7,92390691.3%
Pravastatin sodiumgeneric3,76715677.6%
Lovastatingeneric1,9723066.5%
Livalobrand1,7993046.9%
Fluvastatingeneric1,4216179.6%
Fluvastatin sodiumgeneric1,2662489.9%
Pitavastatingeneric7318394.7%

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 Zocor reports

How many adverse event reports has FDA received for Zocor?

10,348 reports list Zocor as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 108 of them arrived in the latest 12 months. Another 37,296 list it only as a concomitant medication.

What reactions are recorded in Zocor reports?

myalgia (14.7%), rhabdomyolysis (13.2%), drug hypersensitivity (10.1%), asthenia (5.7%) and blood creatine phosphokinase increased (5.5%). 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 Zocor was responsible.

How serious are the reports?

75% are marked serious by the reporter. Among the outcomes recorded, 8% of reports include death and 36.3% 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 (29.5%), consumer or non-health professional (28.2%) and physician (27.8%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Zocor rising?

108 reports in the 12 months to June 2026, up 27% from 85 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 Zocor 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 Zocor?

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 Zocor as a suspect or interacting product; reports listing it only as a concomitant medication (37,296) 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.