Reported Reactions

Drugs › Androgen receptor inhibitor

Brand name · Bicalutamide

Casodex: adverse event reports filed with FDA

2,967 reports list it as a suspect or interacting product, 2004–2026. Class: Androgen receptor inhibitor. Also reported as Casodex 50.

2,967
reports as suspect product
0% of all reports · about 132 a year
24
reports, 12 months to June 2026
40 in the 12 months before
86%
marked serious by the reporter
63.3% across the class
13.6%
record death among outcomes, as reported
403 reports · not verified by FDA

2,967 adverse event reports received by FDA list the brand name Casodex (bicalutamide) as a suspect or interacting product, from January 2004 to May 2026. A further 3,720 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, 24 reports listed it, down 40% from 40 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 132 reports a year and 0% of the 20,646,523 reports in the database, and 4.8% of the reports for the androgen receptor 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 malignant neoplasm progression (7.3%), interstitial lung disease (5.8%) and prostatic specific antigen increased (5.1%). A report can list several reactions, so shares add to more than 100%; 643 different terms appear across these reports. Malignant neoplasm progression is recorded in 7.3% of these reports, about the same share as in the median androgen receptor inhibitor drug (7.3%).

86% of the reports are marked serious by the reporter (63.3% across the class); 13.6% record death among the outcomes and 42.6% record hospitalisation, as reported. 43.8% of the reports came from physicians, and the largest patient age group is 75 and over (32.8%). 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

01020Jul 2021: 7Aug 2021: 9Sep 2021: 4Oct 2021: 4Nov 2021: 20Dec 2021: 92022Jan 2022: 8Feb 2022: 5Mar 2022: 20Apr 2022: 7May 2022: 5Jun 2022: 14Jul 2022: 5Aug 2022: 9Sep 2022: 8Oct 2022: 6Nov 2022: 11Dec 2022: 92023Jan 2023: 5Feb 2023: 6Mar 2023: 16Apr 2023: 7May 2023: 3Jun 2023: 2Jul 2023: 2Aug 2023: 3Sep 2023: 6Oct 2023: 10Nov 2023: 3Dec 2023: 12024Jan 2024: 7Feb 2024: 3Mar 2024: 7Apr 2024: 4May 2024: 1Jun 2024: 5Jul 2024: 1Aug 2024: 3Sep 2024: 4Oct 2024: 1Nov 2024: 5Dec 2024: 62025Jan 2025: 6Feb 2025: 3Mar 2025: 3Apr 2025: 1May 2025: 1Jun 2025: 6Jul 2025: 0Aug 2025: 5Sep 2025: 4Oct 2025: 1Nov 2025: 5Dec 2025: 12026Jan 2026: 0Feb 2026: 1Mar 2026: 2Apr 2026: 1May 2026: 4Jun 2026: 0

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

01152292004: 12320042005: 1412006: 1242007: 11120072008: 1882009: 2292010: 17920102011: 1492012: 1302013: 11520132014: 1262015: 1572016: 17720162017: 1972018: 1952019: 15420192020: 1182021: 922022: 10720222023: 642024: 472025: 3620252026: 8

2026 covers reports received through June 2026 only.

Reactions recorded in the reports

share of Casodex reports recording the termmedian drug in androgen receptor inhibitor

  1. Interstitial lung diseasescarring or inflammation of lung tissue5.8%171
  2. Fatiguetiredness4.3%128
  3. Deaththe patient died; cause not stated by this term3.7%111
  4. Astheniaweakness or lack of energy3.6%108
  5. Hot flusha hot flush3.6%106
  6. Dyspnoeashortness of breath3.4%100
  7. Anaemialow red blood cells2.6%76
  8. Dizzinesslight-headedness or unsteadiness2.5%73
  9. Nauseafeeling sick2.3%68
  10. Malaisegeneral feeling of being unwell2.1%62
  11. Falla fall2%60
  12. Off label useused for a purpose or in a way not on the label2%60
  13. Diarrhoealoose or frequent stools2%59
  14. Drug ineffectivethe medicine did not work as expected2%59
  15. Decreased appetitereduced appetite2%58
  16. Weight decreasedweight loss2%58
  17. Platelet count decreasedlow platelet count1.9%55
  18. Cardiac failureheart failure1.8%53
  19. Condition aggravatedthe condition being treated got worse1.7%51
  20. Pyrexiafever1.7%51
  21. Arthralgiajoint pain1.7%50
  22. Haematuriablood in the urine1.7%50
  23. Oedema peripheralswelling of the legs, ankles or hands1.7%49
  24. Back painback pain1.6%47
  25. Myocardial infarctionheart attack1.6%47

Top 30 of 643 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 5 drugs in the androgen receptor 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

Death13.6%403
Life-threatening5.7%168
Hospitalisation (initial or prolonged)42.6%1,263
Disability3.2%95
Congenital anomaly0%1
Other serious39.3%1,166
Not serious14%416

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 61,805 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 20.1%2
2 to 110%0
12 to 170%0
18 to 440.3%8
45 to 6411.1%328
65 to 7424.9%739
75 and over32.8%973
Age not given30.9%917

Patient sex

Female1.1%32
Male93%2,760
Not given5.9%175

Who reported

Physician43.8%1,301
Pharmacist8.9%265
Other health professional11.2%333
Lawyer0%0
Consumer or non-health professional21.4%635
Not given14.6%433

Age and sex as stated in the report; the reporter's qualification is the primary source recorded by FDA. 38% of reports give the United States as the country of the event or reporter.

Reason for use recorded

Indication as recorded (MedDRA)ReportsShare
Prostate cancer1,59953.9%
Prostate cancer metastatic973.3%
Hormone-refractory prostate cancer160.5%
Prostatic specific antigen increased80.3%
Neoplasm malignant50.2%
Hormone-dependent prostate cancer40.1%

The indication field is filled in by the reporter and is often blank; shares are of all 2,967 reports.

Drugs most often listed in the same reports

Drug (any role in the report)ReportsShare of Casodex reports
Zoladex58019.5%
Leuprolide acetate41113.9%
Aspirin1675.6%
Lupron1575.3%
Eligard1374.6%
Taxotere953.2%
Xtandi913.1%
Leuplin903%
Docetaxel883%
Zytiga782.6%

Other products listed in reports where Casodex 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

MeasureCasodexAndrogen receptor inhibitorAll reports
Reports as suspect product2,96761,80520,646,523
Share of that pool—4.8%0%
Reports, latest 12 months24—1,332,454
Marked serious86%63.3%57.4%
Death recorded among outcomes, per 1,000 reports13618891
Hospitalisation recorded, per 1,000 reports426201213
Consumer-filed share21.4%63.1%45.8%
Top term, share of reportsMalignant neoplasm progression 7.3%median 7.3%0.5%

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 androgen receptor inhibitor class

DrugName typeReportsLatest 12 monthsMarked serious
Xtandibrand43,7101,11454.2%
Enzalutamidegeneric10,81142092.7%
Bicalutamidegeneric2,97818493.5%
Winlevibrand1,3392452.7%

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 Casodex reports

How many adverse event reports has FDA received for Casodex?

2,967 reports list Casodex as a suspect or interacting product in the openFDA FAERS release of 28 Sep 2026, covering reports received through June 2026. 24 of them arrived in the latest 12 months. Another 3,720 list it only as a concomitant medication.

What reactions are recorded in Casodex reports?

malignant neoplasm progression (7.3%), interstitial lung disease (5.8%), prostatic specific antigen increased (5.1%), fatigue (4.3%) and death (3.7%). 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 Casodex was responsible.

How serious are the reports?

86% are marked serious by the reporter. Among the outcomes recorded, 13.6% of reports include death and 42.6% 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?

physician (43.8%), consumer or non-health professional (21.4%) and not given (14.6%). Most reports reach FDA through the manufacturer, which must forward reports it receives.

Are reports for Casodex rising?

24 reports in the 12 months to June 2026, down 40% from 40 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 Casodex 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 Casodex?

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 Casodex as a suspect or interacting product; reports listing it only as a concomitant medication (3,720) 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.