Firocoxib (Previcox, Firox): adverse event reports that FDA received

Signs that the reports list

A sign is a coded term from the report. The words in brackets are a plain gloss of the term. The percentage is the share of the 9,582 reports that list the sign. One report can list more than one sign.

The sign that is in the largest number of the reports comes first.

1. Vomiting26.6%2,545 reports
2. Anorexia[not eating]14.2%1,359 reports
3. Elevated blood urea nitrogen (BUN)[a kidney value above the normal range]11.4%1,097 reports
4. Diarrhoea[diarrhea]10.1%972 reports
5. Elevated creatinine[a kidney value above the normal range]8.7%830 reports
6. Death8.4%809 reports
7. Elevated serum alkaline phosphatase (SAP)[a liver and bone enzyme above the normal range]8.3%795 reports
8. Death by euthanasia[the animal was euthanized]7.6%724 reports
9. Elevated alanine aminotransferase (ALT)[a liver enzyme above the normal range]7.5%723 reports
10. Depression[dull, quiet or withdrawn]7.5%715 reports
11. Lethargy[unusually tired or inactive]6.7%645 reports
12. Other abnormal test result NOS[abnormal laboratory result, type not specified]4.7%447 reports
13. Anaemia NOS[low red blood cell count]4.3%411 reports
14. Ataxia[unsteady, uncoordinated movement]4%382 reports

The list shows 30 of 1,494 coded signs. A report is not proof that a drug caused a sign. Download all signs (CSV)

Reports by species

• Dog83.6%8,006
• Horse5.2%497
• Cat0.5%52
• Human exposure0.4%37
• Muleunder 0.1%3
• Donkeyunder 0.1%2

The share is of all 9,582 reports that name firocoxib. The other reports give a different species or no species.

Reports for each month, Jul 2021 to Jun 2026

The month is the month in which FDA received the report. Each chart has its own scale. FDA says that a report can take 3 to 6 months to reach the public data. The newest months can get more reports in a later update.

Reports by year

• Dog
• Cat
• Horse
• Other or not given

2026 has the reports that FDA received through Jun 2026. Download the years (CSV)

What the reports record

Each bar is on a scale of 0 to 100%.

Next in the A to Z list

• Fenbendazole
• Fenprostalene
• Fentanyl
• Fenthion
• Florfenicol
• Florfenicol + Flunixin
• Florfenicol + Mometasone furoate + Terbinafine
• Florfenicol + Terbinafine

All drugs by active ingredient. Brand names A to Z

FDA pages for this drug

• How to Report Animal Drug and Device Side Effects and Product ProblemsThe FDA page that tells an owner or a veterinarian how to send a report.
• Green Book record of NADA 141-230The FDA record of the application for Previcox.Client Information Sheet of Previcox (PDF): a label document that FDA posts with the record.Package Insert of Previcox (PDF): a label document that FDA posts with the record.
• Green Book record of ANADA 200-722The FDA record of the application for Firox.Client Information Sheet of Firox (PDF): a label document that FDA posts with the record.Package Insert of Firox (PDF): a label document that FDA posts with the record.
• Green Book record of ANADA 200-751The FDA record of the application for Firocoxib Chewable Tablets for Dogs.Package Insert of Firocoxib Chewable Tablets for Dogs (PDF): a label document that FDA posts with the record.
• Green Book record of ANADA 200-755The FDA record of the application for Firocoxib.Client Information Sheet of Firocoxib (PDF): a label document that FDA posts with the record.Package Insert of Firocoxib (PDF): a label document that FDA posts with the record.
• Green Book record of ANADA 200-756The FDA record of the application for Firodyl.
• Green Book record of ANADA 200-861The FDA record of the application for Firocoxib Chewable Tablets.
• Animal Drugs @ FDAThe search page of the Green Book, the FDA list of approved animal drugs.

The site checked these addresses on 2 Oct 2026. The links open in a new tab.

Cite this page

Pet Drug Reports. Firocoxib: adverse event reports that FDA received. https://petdrugreports.com/drug/firocoxib/ Source: FDA Center for Veterinary Medicine, openFDA Animal and Veterinary adverse event reports, export of 30 Oct 2026. Reports received through 26 Jun 2026.

Where the data come from

Questions about these reports

Which brand are these reports about?

The openFDA records give the value "MSK" for the brand name and for the manufacturer name of each drug. FDA says that MSK means "masked". So the site cannot count a report for a brand. The Green Book section of this page lists the brand names with this active ingredient.

Do the reports show that the drug caused the signs?

No. FDA states this about the data.

When looking at the results, be aware that there is no certainty that the reported drug or device caused the adverse event.

The adverse event may have been related to an underlying disease, other drugs used at the same time or other non-drug related sources.

FDA Center for Veterinary Medicine. Source: Adverse Event Reports for Animal Drugs and Devices

How many reports did FDA receive in the latest 12 months?

FDA received 176 reports in the 12 months to June 2026. It received 167 reports in the 12 months before. FDA says that a report can take 3 to 6 months to reach the public data. The newest months can get more reports in a later update.

What kinds of report are in the count?

Of the 9,582 reports received from January 2005 to June 2026, 87.4% are about a safety issue only. 2.1% are about a lack of expected effectiveness, alone or with a safety issue. 10.5% are about a defect of the product or its package.