Reported Reactions

Drugs › Proton pump inhibitor

Brand name · Lansoprazole

Prevacid: adverse event reports filed with FDA

40,151 reports list it as a suspect or interacting product, 2004–2026. Class: Proton pump inhibitor. Also reported as Prevacid Tablets, Prevacid Cap.

40,151
reports as suspect product
0.2% of all reports · about 1,785 a year
273
reports, 12 months to June 2026
217 in the 12 months before
95.8%
marked serious by the reporter
86.4% across the class
12.9%
record death among outcomes, as reported
5,173 reports · not verified by FDA

Between January 2004 and June 2026, 40,151 adverse event reports received by FDA list the brand name Prevacid (lansoprazole) as a suspect or interacting product. Reports that mention it only as a concomitant medication (33,350) are left out of every figure here.

In the 12 months to June 2026, 273 reports listed it, up 26% from 217 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 1,785 reports a year and 0.2% of the 20,646,523 reports in the database, and 8.3% of the reports for the proton pump 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 chronic kidney disease (76.5%), acute kidney injury (37.1%) and renal failure (28.6%). A report can list several reactions, so shares add to more than 100%; 1,231 different terms appear across these reports. Chronic kidney disease is recorded in 76.5% of these reports, a larger share than in the median proton pump inhibitor drug (31.6%).

95.8% of the reports are marked serious by the reporter (86.4% across the class); 12.9% record death among the outcomes and 8.5% record hospitalisation, as reported. 34.2% of the reports came from other health professionals, and the largest patient age group is 45 to 64 (15.6%). 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

0118235Jul 2021: 235Aug 2021: 210Sep 2021: 143Oct 2021: 63Nov 2021: 61Dec 2021: 742022Jan 2022: 43Feb 2022: 135Mar 2022: 92Apr 2022: 57May 2022: 32Jun 2022: 17Jul 2022: 34Aug 2022: 57Sep 2022: 61Oct 2022: 28Nov 2022: 23Dec 2022: 1182023Jan 2023: 18Feb 2023: 28Mar 2023: 30Apr 2023: 11May 2023: 10Jun 2023: 17Jul 2023: 7Aug 2023: 32Sep 2023: 18Oct 2023: 21Nov 2023: 10Dec 2023: 182024Jan 2024: 35Feb 2024: 23Mar 2024: 16Apr 2024: 30May 2024: 19Jun 2024: 18Jul 2024: 39Aug 2024: 22Sep 2024: 19Oct 2024: 34Nov 2024: 13Dec 2024: 142025Jan 2025: 10Feb 2025: 7Mar 2025: 23Apr 2025: 9May 2025: 6Jun 2025: 21Jul 2025: 21Aug 2025: 26Sep 2025: 24Oct 2025: 20Nov 2025: 10Dec 2025: 312026Jan 2026: 15Feb 2026: 16Mar 2026: 14Apr 2026: 22May 2026: 36Jun 2026: 38

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

08,19116,3812004: 8520042005: 772006: 712007: 5720072008: 802009: 972010: 13420102011: 1042012: 1492013: 11720132014: 1232015: 3312016: 44120162017: 4122018: 16,3812019: 15,22820192020: 2,6362021: 2,0802022: 69720222023: 2202024: 2822025: 20820252026: 141

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Prevacid reports recording the termmedian drug in proton pump inhibitor

  1. Chronic kidney diseaselong-term kidney disease76.5%30,723
  2. Acute kidney injurysudden loss of kidney function37.1%14,895
  3. Renal failurekidney failure28.6%11,475
  4. End stage renal diseasekidney failure needing dialysis or transplant23.1%9,271
  5. Renal injury22.5%9,026
  6. Deaththe patient died; cause not stated by this term5.5%2,191
  7. Nephrogenic anaemia4.9%1,957
  8. Renal impairmentreduced kidney function4.3%1,745
  9. Rebound acid hypersecretion3.9%1,565
  10. Nephropathy2.9%1,173
  11. Dialysisdialysis2.6%1,061
  12. Painpain, site not specified2.2%902
  13. Renal haemangioma2%786
  14. Hyperparathyroidism secondary1.9%766
  15. Proteinuriaprotein in the urine1.6%625
  16. Drug dependencedependence on a medicine1.5%613
  17. Drug ineffectivethe medicine did not work as expected1.5%607
  18. Hypertensive nephropathy1.4%572
  19. Nephrolithiasiskidney stones1.4%560
  20. Diabetic nephropathy1.4%550
  21. Dyspepsiaindigestion1.3%510
  22. Condition aggravatedthe condition being treated got worse1.2%491
  23. Drug hypersensitivityan allergic-type reaction to a medicine1.2%490
  24. Chronic kidney disease-mineral and bone disorder1.2%488
  25. Depressionlow mood1.2%488

Top 30 of 1,231 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 22 drugs in the proton pump 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

Death12.9%5,173
Life-threatening1.7%685
Hospitalisation (initial or prolonged)8.5%3,397
Disability2.3%931
Congenital anomaly0.7%282
Other serious93.9%37,698
Not serious4.2%1,700

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 484,090 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%78
2 to 110.2%66
12 to 170.2%61
18 to 444.5%1,815
45 to 6415.6%6,278
65 to 746.1%2,463
75 and over3.1%1,242
Age not given70.1%28,148

Patient sex

Female31.5%12,629
Male21.3%8,567
Not given47.2%18,955

Who reported

Physician2.7%1,068
Pharmacist0.4%141
Other health professional9.6%3,869
Lawyer34.2%13,737
Consumer or non-health professional27.2%10,908
Not given26%10,428

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 97.3% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Gastrooesophageal reflux disease11,18027.8%
Dyspepsia8002%
Gastrointestinal disorder5401.3%
Antacid therapy1390.3%
Gastric ph decreased780.2%
Ulcer710.2%

The indication field is filled in by the reporter and is often blank; shares are of all 40,151 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Prevacid reports
Nexium29,15172.6%
Prilosec28,26070.4%
Pantoprazole sodium24,43560.9%
Nexium 24HR19,44348.4%
Dexilant17,36843.3%
Prevacid 24 HR17,09042.6%
Prilosec OTC13,98634.8%
Omeprazole11,22828%
Pantoprazole7,49518.7%
Aciphex5,58213.9%

Other products listed in reports where Prevacid 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

MeasurePrevacidProton pump inhibitorAll reports
Reports as suspect product40,151484,09020,646,523
Share of that pool—8.3%0.2%
Reports, latest 12 months273—1,332,454
Marked serious95.8%86.4%57.4%
Death recorded among outcomes, per 1,000 reports12910591
Hospitalisation recorded, per 1,000 reports85199213
Consumer-filed share27.2%26.2%45.8%
Top term, share of reportsChronic kidney disease 76.5%median 31.6%0.4%

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 proton pump inhibitor class

DrugName typeReportsLatest 12 monthsMarked serious
Nexiumbrand85,36757668.6%
Omeprazolegeneric61,1762,50689.4%
Pantoprazolegeneric44,9802,71095.2%
Pantoprazole sodiumgeneric44,0981,62990.9%
Prilosecbrand42,34311588.3%
Nexium 24HRbrand27,75330085.1%
Lansoprazolegeneric26,5701,74994.8%
Prilosec OTCbrand24,54911978.4%
Dexilantbrand23,62123391.5%
Prevacid 24 HRbrand20,1361392.6%
Esomeprazolegeneric17,1931,29396.8%
Aciphexbrand7,246392.1%
Esomeprazole magnesiumgeneric5,01436882.5%
Omeprazole magnesiumgeneric4,12017574.9%
Rabeprazolegeneric2,69318090.8%

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 Prevacid reports

How many adverse event reports has FDA received for Prevacid?

40,151 reports list Prevacid as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 273 of them arrived in the latest 12 months. Another 33,350 list it only as a concomitant medication.

What reactions are recorded in Prevacid reports?

chronic kidney disease (76.5%), acute kidney injury (37.1%), renal failure (28.6%), end stage renal disease (23.1%) and renal injury (22.5%). 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 Prevacid was responsible.

How serious are the reports?

95.8% are marked serious by the reporter. Among the outcomes recorded, 12.9% of reports include death and 8.5% 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?

lawyer (34.2%), consumer or non-health professional (27.2%) and not given (26%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Prevacid rising?

273 reports in the 12 months to June 2026, up 26% from 217 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 Prevacid 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 Prevacid?

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 Prevacid as a suspect or interacting product; reports listing it only as a concomitant medication (33,350) 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.