Olanzapine: adverse event reports filed with FDA

46,837

reports as suspect product

0.2% of all reports · about 2,082 a year

4,087

reports, 12 months to June 2026

4,626 in the 12 months before

95.3%

marked serious by the reporter

70.7% across the class

14.1%

record death among outcomes, as reported

6,587 reports · not verified by FDA

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 Olanzapine reports recording the termmedian drug in atypical antipsychotic

1. Drug ineffectivethe medicine did not work as expected10.6%4,947
2. Toxicity to various agentspoisoning or toxic effect of one or more substances7.5%3,494
3. Off label useused for a purpose or in a way not on the label6%2,800
4. Drug interactionan interaction between medicines5.8%2,713
5. Weight increasedweight gain5.2%2,436
6. Somnolencedrowsiness4.6%2,161
7. Suicide attempta suicide attempt4.3%1,999
8. Neuroleptic malignant syndromea rare severe reaction with fever and rigidity4.2%1,971
9. Condition aggravatedthe condition being treated got worse4%1,884
10. Overdosea dose above the recommended amount3.9%1,807
11. Completed suicidedeath by suicide3.8%1,802
12. Intentional overdosea deliberate overdose3.8%1,785
13. Drug abusemisuse of a medicine3.8%1,778
14. Sedationdrowsiness from a medicine3.5%1,662
15. Schizophreniaschizophrenia3.4%1,570
16. Electrocardiogram QT prolongeda QT prolongation on the ECG3.3%1,532
17. Confusional stateconfusion3.2%1,495
18. Agitationrestlessness3.1%1,462
19. Psychotic disordera loss of contact with reality3%1,428
20. Tachycardiafast heart rate2.9%1,381
21. Extrapyramidal disordermovement problems such as stiffness or tremor2.7%1,287
22. Anxietyanxiety2.7%1,275
23. Hypotensionlow blood pressure2.6%1,236
24. Vomitingbeing sick2.5%1,191
25. Coma2.4%1,126
26. Tremorshaking2.4%1,113
27. Neutropenialow neutrophils, a type of white blood cell2.3%1,082
28. Akathisiainner restlessness and an urge to move2.3%1,057
29. Nauseafeeling sick2.3%1,057
30. Suicidal ideationthoughts of suicide2.3%1,054

Top 30 of 2,884 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 37 drugs in the atypical antipsychotic 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 683,680 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

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 20.6% of reports give the United States as the country of the event or reporter.

Reason for use recorded

The indication field is filled in by the reporter and is often blank; shares are of all 46,837 reports.

Drugs most often listed in the same reports

Other products listed in reports where Olanzapine 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

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 atypical antipsychotic class

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.

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 Olanzapine as a suspect or interacting product; reports listing it only as a concomitant medication (22,258) 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.