Difloxacin Hydrochloride: adverse event reports that FDA received

Name: Difloxacin Hydrochloride: adverse event reports that FDA received, by year and species
Creator: Pet Drug Reports
License: https://creativecommons.org/publicdomain/zero/1.0/

Active ingredient

The Green Book lists no brand name for exactly this active ingredient.

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.

Read this first. FDA says this about the data:

An API dataset query result cannot be used to estimate the risk associated with the product or compare one drug or device product with another. When looking at the results, be aware that there is no certainty that the reported drug or device caused the adverse event. This dataset should not be the sole source of information for clinical decision-making or other assumptions about the safety or effectiveness of a product. 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 publishes these words. Source: Adverse Event Reports for Animal Drugs and Devices, read on 2 Oct 2026. The data have the reports that FDA received through 26 Jun 2026.

This page is not veterinary advice. For an animal that is ill, speak to a veterinarian.

Contacting a veterinarian How to report to FDA

From March 1998 to February 2011, FDA received 91 adverse event reports that name a drug with difloxacin hydrochloride as its active ingredient. Of the 91 reports, 73 (80.2%) are about dogs. 3 reports are about cats (3.3%).

In January to March 2026, FDA received no reports that name this drug. The signs that appear in the largest number of the 91 reports are "Anorexia", "Depression" and "Vomiting". A report is not proof that a drug caused a sign.

Fewer than 20 reports named this drug in the 12 months before June 2026, so this page gives no change. Reports about dogs are 80.2% of the reports that name this drug, and 72.6% of all reports.

Search engines list a drug page with 500 reports or more in all years. The page also needs 30 reports or more in the 12 months to June 2026. This page is under one of these numbers. The site keeps the page and keeps it out of search engines.

Since the last update of the FDA data

The latest update of the FDA data, recorded on 11 Oct 2026, changed no count of this page.

January to March 2026 is the latest closed quarter in the data. In that quarter FDA received 0 reports that name difloxacin hydrochloride: 0 dog, 0 cat, 0 horse, 0 other or not given.

All updates Feed of updates (RSS)

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 91 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.

Anorexia[not eating]14.3%13 reports
Depression[dull, quiet or withdrawn]13.2%12 reports
Vomiting11%10 reports
Convulsion[seizure]7.7%7 reports
Death7.7%7 reports
Death by euthanasia[the animal was euthanized]7.7%7 reports
Lack of efficacy (bacteria) - NOS[the product did not have the expected effect: target not specified]7.7%7 reports
Elevated serum alkaline phosphatase (SAP)[a liver and bone enzyme above the normal range]6.6%6 reports
Fever5.5%5 reports
Tablets, Abnormal[a product quality report, not a sign in an animal]5.5%5 reports
Anaemia NOS[low red blood cell count]4.4%4 reports
Ataxia[unsteady, uncoordinated movement]4.4%4 reports
Leucocytosis NOS[high white blood cell count]4.4%4 reports
Weight loss4.4%4 reports

Show the next 16 signs

Blindness3.3%3 reports
Crystalluria3.3%3 reports
Diarrhoea[diarrhea]3.3%3 reports
Dyspnoea[difficulty breathing]3.3%3 reports
Elevated alanine aminotransferase (ALT)[a liver enzyme above the normal range]3.3%3 reports
Haematuria[blood in the urine]3.3%3 reports
Head tilt - ear disorder3.3%3 reports
Hypoalbuminaemia[low blood albumin]3.3%3 reports
Lameness3.3%3 reports
Locomotor disturbance3.3%3 reports
Neurological signs NOS[NOS: not otherwise specified]3.3%3 reports
PR-liver, lesion(s)[legacy FDA term: lesions found in the liver]3.3%3 reports
Physical label missing3.3%3 reports
Seal, Abnormal[a product quality report, not a sign in an animal]3.3%3 reports
Abdominal pain2.2%2 reports
Acidic urine2.2%2 reports

The list shows 30 of 141 coded signs. A report is not proof that a drug caused a sign. Download all signs (CSV)

Reports by species

Dog80.2%73
Cat3.3%3
Human exposure1.1%1

The share is of all 91 reports that name difloxacin hydrochloride. The other reports give a different species or no species.

Reports for each month, Jul 2021 to Jun 2026

Dog0 reports

No chart: no month has 5 or more reports.

Cat0 reports

No chart: no month has 5 or more reports.

Horse0 reports

No chart: no month has 5 or more reports.

Other or not given0 reports

No chart: no month has 5 or more reports.

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

Reports that name difloxacin hydrochloride, by the year in which FDA received them and by species
Year	Dog	Cat	Other or not given	All species
2011	1	0	0	1
2009	2	0	0	2
2008	3	0	1	4
2006	1	0	0	1
2005	2	0	2	4
2004	11	0	2	13
2003	9	0	0	9
2002	7	0	5	12
2001	11	0	1	12
2000	2	1	1	4
1999	17	0	1	18
1998	7	2	2	11

2011 has the reports that FDA received through Feb 2011. Download the years (CSV)

What the reports record

Outcome at the time of the report

Recovered/Normal0%0
Recovered with Sequela[recovered, with a lasting effect]0%0
Ongoing0%0
Died16.5%15
Euthanized0%0
Outcome Unknown0%0

An outcome in a report is not proof that the drug caused it. The person who sends the report gives the outcome. Each share is of the 91 reports that name difloxacin hydrochloride.

A report about more than one animal can have more than one outcome.

Kind of report

Safety issue84.6%77
Lack of expected effectiveness0%0
Both safety and lack of expected effectiveness0%0
Manufacturing or product defect15.4%14
Other0%0

Show age, weight, breed and route

Age of the animal

Under 1 year1.1%1
1 to 3 years11%10
4 to 7 years15.4%14
8 to 11 years25.3%23
12 years and over7.7%7
Age not given39.6%36

Weight of the animal

Under 5 kg (11 lb)5.5%5
5 to 9.9 kg (11 to 22 lb)8.8%8
10 to 24.9 kg (22 to 55 lb)15.4%14
25 to 44.9 kg (55 to 99 lb)20.9%19
45 kg and over (99 lb and over)7.7%7
Weight not given41.8%38

Breed, where the report gives one breed

A breed with many animals has many reports.

Route in the report

Oral82.4%75

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

Approved animal drugs with this active ingredient (FDA Green Book)

This section is reference data. It has no report count.

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.

Applications in the Green Book of 2 Nov 2026, pioneer applications (NADA) first
Brand name	Active ingredients	Sponsor	Approved species	Application
Dicural Tabletsapproval withdrawn	Difloxacin Hydrochloride	Boehringer Ingelheim Animal Health USA Inc.	Dogs	NADA 141-096

Next in the A to Z list

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.
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. Difloxacin Hydrochloride: adverse event reports that FDA received. https://petdrugreports.com/drug/difloxacin-hydrochloride/ 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

The counts come from the openFDA Animal and Veterinary adverse event files, export of 30 Oct 2026. The files have the reports that the FDA Center for Veterinary Medicine received through 26 Jun 2026. The files mask brand and manufacturer names. The site counts a drug by the active ingredients that each record gives, and gives no count to a brand, an application or a company. Ingredient names and the lists of approved products follow the FDA Green Book of 2 Nov 2026. The site does not use the application number that a record has.

The site does not publish report text, lot numbers or details of a reporter. FDA's record is the authority. See how the site counts reports, the data sources and the corrections page.

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 lists no brand name for exactly 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 no reports in the 12 months to June 2026. It received no 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 91 reports received from March 1998 to February 2011, 84.6% are about a safety issue only. 15.4% are about a defect of the product or its package.