Pet Drug Reports

Pacing: in adverse event reports for animal drugs

Clinical sign, a VeDDRA term

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 . The data have the reports that FDA received through .

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

Contacting a veterinarianHow to report to FDA

From October 1987 to June 2026, FDA received 3,663 adverse event reports for animal drugs that list this sign. That is 0.3% of the 1,378,761 reports that FDA received from January 1987 to June 2026. In the 12 months to June 2026, FDA received 305 reports that list this sign.

Of the 3,663 reports, 88.2% 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 172 of 1,149 clinical signs with a page. Reports that list this sign fell by 12.6% in the 12 months to June 2026, compared with the 12 months before. Reports for all animal drugs fell by 4.6% in the same periods. The newest months can get more reports in a later update. Reports about dogs are 88.2% of the reports that list this sign, and 72.6% of all reports.

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 63 drug pages.

Show the 63 drug pages
Drug pages with 20 or more reports that list this sign, in order of name
Active ingredientsReports that list the sign
(S) - methoprene54
Acepromazine Maleate24
Afoxolaner310
Afoxolaner + Moxidectin + Pyrantel Pamoate33
Amoxicillin + Clavulanate Potassium20
Atipamezole Hydrochloride33
Bedinvetmab286
Buprenorphine197
Butorphanol Tartrate64
Carprofen318
Cefovecin sodium84
Cefpodoxime proxetil27
Cyclosporine72
Deracoxib60
Dexmedetomidine40
Dexmedetomidine hydrochloride22
Diphenhydramine36
Enalapril Maleate20
Enrofloxacin31
Famotidine23
Febantel + Praziquantel + Pyrantel Pamoate75
Firocoxib49
Florfenicol + Mometasone furoate + Terbinafine25
Fluoxetine hydrochloride28
Fluralaner201
Frunevetmab41
Gabapentin141
Grapiprant72
Imidacloprid27
Imidacloprid + Moxidectin98
Insulin25
Isoflurane53
Ivermectin36
Ivermectin + Pyrantel Pamoate205
Ketamine Hydrochloride33
Levothyroxine sodium36
Lotilaner42
Lufenuron + Milbemycin Oxime45
Maropitant133
Melarsomine Dihydrochloride138
Meloxicam87
Metronidazole28
Midazolam32
Milbemycin Oxime38
Milbemycin Oxime + Praziquantel54
Milbemycin Oxime + Spinosad139
Mirtazapine28
Moxidectin120
Nitenpyram52
Oclacitinib121
Pimobendan30
Polysulfated Glycosaminoglycan33
Prednisone63
Propofol37
Pyrantel Pamoate + Sarolaner139
Robenacoxib33
Sarolaner83
Selamectin122
Selegiline Hydrochloride104
Spinosad70
Tramadol40
Trazodone28
Trilostane106

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 63 ingredients.

Show the 63 ingredients

Reports by species

The share is of the 3,663 reports that list this sign. The sign is in 0.3% of all reports about the species dog. The sign is in 0.3% 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.

Reports that list Pacing, by the year in which FDA received them
YearReports
2026157
2025318
2024388
2023255
2022170
2021167
2020187
2019169
2018145
2017230
2016194
2015191
2014144
201320
201248
201164
201087
200996
200878
200772
200670
200572
200458
200325
200238
200131
200064
199965
199833
199716
19963
19953
19931
19921
19892
19871

What these reports record

Outcome at the time of the report

  • Reports with this sign
  • All reports
  • Recovered/Normal24%879, All reports: 20.7%
  • Recovered with Sequela[recovered, with a lasting effect]1.1%41, All reports: 2.3%
  • Ongoing21.4%784, All reports: 17.4%
  • Died6.4%235, All reports: 4.9%
  • Euthanized4.6%169, All reports: 1.5%
  • Outcome Unknown21.3%780, 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 3,663 reports that list this sign.

Age of the animal

  • Reports with this sign
  • All reports
  • Under 1 year5.5%201, All reports: 9.5%
  • 1 to 3 years18.2%665, All reports: 23.9%
  • 4 to 7 years21.8%800, All reports: 20.2%
  • 8 to 11 years22.4%822, All reports: 15.4%
  • 12 years and over29.3%1,074, All reports: 10.7%
  • Age not given2.8%101, 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

All clinical signs

Cite this page

Pet Drug Reports. Pacing: adverse event reports for animal drugs. https://petdrugreports.com/reaction/pacing/ Source: FDA Center for Veterinary Medicine, openFDA Animal and Veterinary adverse event reports, export of . Reports received through .

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?

It is a term from VeDDRA, the list of terms that FDA and drug companies use to code a report. 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 305 reports in the 12 months to June 2026. It received 349 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 2,724 reports that say if the event was serious, 51% 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