Florfenicol: adverse event reports in all combinations

Drug pages with florfenicol

A report names a drug by its set of active ingredients. Each set with florfenicol that has a drug page is in the table, in order of name. The table has 5 sets.

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 9,997 reports that list the sign. One report can list more than one sign and more than one drug.

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

1. Lack of efficacy - NOS[the product did not have the expected effect]21.7%2,173 reports
2. Ataxia[unsteady, uncoordinated movement]8.3%833 reports
3. Lethargy[unusually tired or inactive]6.8%678 reports
4. Death6.5%649 reports
5. Vomiting6.5%645 reports
6. Tubes, Leaking[a product quality report, not a sign in an animal]6.4%636 reports
7. Head tilt - ear disorder6%597 reports
8. Ear discharge5%502 reports
9. Head shake - ear disorder4.8%478 reports
10. Nystagmus[rapid involuntary eye movement]4.3%431 reports
11. Anorexia[not eating]4.2%424 reports
12. Behavioural disorder NOS[behaviour change, type not specified]4.1%414 reports
13. Deafness3.8%381 reports
14. Lack of efficacy (bacteria) - NOS[the product did not have the expected effect: target not specified]3.8%377 reports

Download all signs (CSV)

Reports by species

• Dog59.8%5,983
• Cat9.6%961
• Cattle8%795
• Human exposure3.7%366
• Fish0.7%67
• Goat0.4%38

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 share of kind and age is of the 9,997 reports that name florfenicol.

FDA pages for this ingredient

• 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 141-437The FDA record of the application for Osurnia.
• Green Book record of NADA 141-440The FDA record of the application for Claro.
• Green Book record of ANADA 200-719The FDA record of the application for Simplera.
• Green Book record of ANADA 200-829The FDA record of the application for Klentz.
• Green Book record of ANADA 200-848The FDA record of the application for Florfinasone Otic.
• Green Book record of NADA 141-063The FDA record of the application for Nuflor, Nuflor-S.
• 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. Florfenicol, all combinations: adverse event reports that FDA received. https://petdrugreports.com/ingredient/florfenicol/ 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 brand names with this active ingredient.

Do the reports show that the ingredient caused the signs?

No. A report can name more than one drug, and a drug can have more than one active ingredient. 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 615 reports in the 12 months to June 2026. It received 765 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 9,997 reports received from January 1996 to June 2026, 63.4% are about a safety issue only. 18.7% are about a lack of expected effectiveness, alone or with a safety issue. 17.9% are about a defect of the product or its package.