Ineffective, atopy control: in adverse event reports for animal drugs

Clinical sign, a term of older FDA reports

In plain words: the product did not have the expected effect (atopy control).

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 April 2004 to May 2026, FDA received 3,326 adverse event reports for animal drugs that list this sign. That is 0.2% of the 1,378,761 reports that FDA received from January 1987 to June 2026. In the 12 months to June 2026, FDA received 15 reports that list this sign.

Of the 3,326 reports, 97.8% are about dogs. A report can list more than one sign and more than one drug. A report is not proof that a drug caused a sign.

By number of reports in all years, this sign is number 193 of 1,149 clinical signs with a page. Fewer than 20 reports listed this sign in the 12 months before June 2026, so this page gives no change. Reports about dogs are 97.8% of the reports that list this sign, and 72.6% of all reports.

Search engines list a sign page with 3,000 reports or more in all years. The page also needs 300 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.

Drug pages with reports that list this sign

The table has every drug page with 20 or more reports that list this sign, in order of name. No count decides which drug is in the table. The table has 20 drug pages.

Drug pages with 20 or more reports that list this sign, in order of name
Active ingredients	Reports that list the sign
Afoxolaner	47
Carprofen	33
Cefovecin sodium	52
Cefpodoxime proxetil	91
Cephalexin	59
Cetirizine	31
Cyclosporine	653
Diphenhydramine	61
Fluralaner	20
Hydroxyzine	33
Ivermectin	27
Ketoconazole	84
Levothyroxine sodium	20
Methylprednisolone Acetate	26
Milbemycin Oxime + Spinosad	22
Oclacitinib	2,707
Prednisolone	26
Prednisolone + Trimeprazine Tartrate	88
Prednisone	89
Selamectin	44

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. A report can name more than one drug.

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.
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

Ingredients, all combinations

The list has every active ingredient with 20 or more reports that list this sign, in order of name. It has 25 ingredients.

Show the 25 ingredients

Reports by species

Dog97.8%3,253
Cat2%68
Monkey0.1%2
Horseunder 0.1%1
Other Mammalsunder 0.1%1

The share is of the 3,326 reports that list this sign. The sign is in 0.3% of all reports about the species dog. The sign is in 0% of all reports about the species cat.

Reports by month and by year

Reports for each month, Jul 2021 to Jun 2026. The month is the month in which FDA received the report.

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. New reports use VeDDRA terms, so a term of older reports has few reports in the latest years.

Reports that list Ineffective, atopy control, by the year in which FDA received them
Year	Reports
2026	7
2025	15
2024	17
2023	125
2022	234
2021	131
2020	116
2019	212
2018	333
2017	971
2016	241
2015	391
2014	149
2013	47
2012	45
2011	25
2010	44
2009	22
2008	24
2007	28
2006	37
2005	71
2004	41

What these reports record

Outcome at the time of the report

Reports with this sign
All reports

Recovered/Normal3.9%129, All reports: 20.7%
Recovered with Sequela[recovered, with a lasting effect]under 0.1%1, All reports: 2.3%
Ongoing59.4%1,976, All reports: 17.4%
Died0.6%19, All reports: 4.9%
Euthanized0.5%16, All reports: 1.5%
Outcome Unknown26.5%880, All reports: 22.7%

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 3,326 reports that list this sign.

Age of the animal

Reports with this sign
All reports

Under 1 year0.9%31, All reports: 9.5%
1 to 3 years16.2%539, All reports: 23.9%
4 to 7 years32.4%1,076, All reports: 20.2%
8 to 11 years26.3%874, All reports: 15.4%
12 years and over10.1%336, All reports: 10.7%
Age not given14.1%470, All reports: 20.3%

The outcome is for the full report, not for this sign only.

Next in the A to Z list of signs

Ineffective, antiinflammatory[legacy FDA term: the product did not have the expected effect (antiinflammatory)]
Ineffective, appetite suppression[legacy FDA term: the product did not have the expected effect (appetite suppression)]
Ineffective, ascarids[legacy FDA term: the product did not have the expected effect (ascarids)]
Ineffective, ascarids NOS[legacy FDA term: the product did not have the expected effect (ascarids nos)]
Ineffective, coccidia[legacy FDA term: the product did not have the expected effect (coccidia)]
Ineffective, cognitive dysfunc[legacy FDA term: the product did not have the expected effect (cognitive dysfunc)]
Ineffective, cushings[legacy FDA term: the product did not have the expected effect (cushings)]
Ineffective, delayed effect[legacy FDA term: the product did not have the expected effect (delayed effect)]

All clinical signs

Cite this page

Pet Drug Reports. Ineffective, atopy control: adverse event reports for animal drugs. https://petdrugreports.com/reaction/ineffective-atopy-control/ 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 counts the different spellings of one VeDDRA term together.

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 this sign

What does this term mean in a report?: In plain words: the product did not have the expected effect (atopy control). It is a term from older FDA reports, from before FDA used the VeDDRA list. The person who coded the report selected the term.
How does the count of the latest 12 months compare with the 12 months before?: FDA received 15 reports in the 12 months to June 2026. It received 17 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.
How many of these reports have a serious flag?: Of the 3,012 reports that say if the event was serious, 14.8% have the serious flag. The person who sends a report sets the flag.
Does a drug in the table cause this sign?: The reports do not show that. A report can name more than one drug. 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