Pet Drug Reports

Maropitant (Cerenia)adverse event reports that FDA received

Active ingredient

The name in brackets is a brand name with 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 . 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.

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From May 2007 to June 2026, FDA received 16,807 adverse event reports that name a drug with maropitant as its active ingredient. Of the 16,807 reports, 11,884 (70.7%) are about dogs. 3,847 reports are about cats (22.9%).

In January to March 2026, FDA received 515 reports that name this drug. The signs that appear in the largest number of the 16,807 reports are "Vomiting", "Lethargy" and "Anorexia". A report is not proof that a drug caused a sign.

Reports that name this drug rose by 0.9% 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 cats are 22.9% of the reports that name this drug, and 11% of all reports.

Since the last update of the FDA data

The site recorded an update of the FDA data on . FDA changed these counts for January to March 2026:

  • All species: from 438 to 515.
  • Dog: from 248 to 295.
  • Cat: from 169 to 192.
  • Other species or species not given: from 21 to 28.

January to March 2026 is the latest closed quarter in the data. In that quarter FDA received 515 reports that name maropitant: 295 dog, 192 cat, 0 horse, 28 other or not given.

All updatesFeed 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 16,807 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. Vomiting24%4,027 reports
  2. Lethargy[unusually tired or inactive]21.5%3,607 reports
  3. Anorexia[not eating]12.6%2,120 reports
  4. Diarrhoea[diarrhea]11.9%2,000 reports
  5. Death by euthanasia[the animal was euthanized]10.6%1,785 reports
  6. Death9.5%1,601 reports
  7. Lack of efficacy - NOS[the product did not have the expected effect]9.1%1,534 reports
  8. Not eating8.6%1,452 reports
  9. Elevated alanine aminotransferase (ALT)[a liver enzyme above the normal range]7.7%1,298 reports
  10. Other abnormal test result NOS[abnormal laboratory result, type not specified]6.8%1,141 reports
  11. Weight loss6.3%1,053 reports
  12. Ataxia[unsteady, uncoordinated movement]5.7%955 reports
  13. Decreased appetite5.7%955 reports
  14. Fever5.7%954 reports
Show the next 16 signs
  1. Elevated blood urea nitrogen (BUN)[a kidney value above the normal range]5.2%870 reports
  2. Abnormal radiograph finding5.1%864 reports
  3. Dehydration5.1%862 reports
  4. Leucocytosis NOS[high white blood cell count]5%841 reports
  5. Hypersalivation[drooling]4.9%823 reports
  6. Elevated total bilirubin[bilirubin above the normal range]4.9%816 reports
  7. Elevated serum alkaline phosphatase (SAP)[a liver and bone enzyme above the normal range]4.7%793 reports
  8. Anaemia NOS[low red blood cell count]4.5%761 reports
  9. Abnormal ultrasound finding4.3%721 reports
  10. Ineffective, antiemetic[legacy FDA term: the product did not have the expected effect (antiemetic)]4.2%710 reports
  11. Behavioural disorder NOS[behaviour change, type not specified]4.2%707 reports
  12. Seizure NOS[seizure, type not specified]4.2%706 reports
  13. Elevated creatinine[a kidney value above the normal range]4.1%683 reports
  14. Neutrophilia[high neutrophil count]4%678 reports
  15. Bloody diarrhoea[diarrhea with blood]3.8%644 reports
  16. Anaphylaxis[sudden severe allergic-type reaction]3.7%630 reports

The list shows 30 of 2,108 coded signs. A report is not proof that a drug caused a sign. Download all signs (CSV)

Reports by species

  • Dog70.7%11,884
  • Cat22.9%3,847
  • Human exposure1.2%208
  • Otherunder 0.1%7
  • Rabbitunder 0.1%7
  • Mouseunder 0.1%2

The share is of all 16,807 reports that name maropitant. The other reports give a different species or no species.

Reports for each month, Jul 2021 to Jun 2026

Dog4,810 reports. Largest count in one month: 124 (Dec 2024)
Cat2,154 reports. Largest count in one month: 69 (Oct 2025)
Horse0 reports

No chart: no month has 5 or more reports.

Other or not given444 reports. Largest count in one month: 15 (Aug 2022)

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 maropitant, by the year in which FDA received them and by species
YearDogCatHorseOther or not givenAll species
2026606307046959
20251,31260001102,022
20241,1554820711,708
20238594530841,396
2022613228099940
2021580157072809
2020574202165842
2019647217094958
2018676192058926
2017658153064875
2016597155055807
2015508127044679
2014455117040612
2013471108026605
2012379104031514
201131478029421
201037570034479
200932646024396
200847541024540
20073041005319

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

What the reports record

Outcome at the time of the report

  • Recovered/Normal17.7%2,980
  • Recovered with Sequela[recovered, with a lasting effect]0.2%32
  • Ongoing33%5,547
  • Died11.2%1,882
  • Euthanized9.6%1,621
  • Outcome Unknown13.6%2,290

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 16,807 reports that name maropitant.

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

Kind of report

  • Safety issue84.2%14,149
  • Lack of expected effectiveness3.6%601
  • Both safety and lack of expected effectiveness6.7%1,125
  • Manufacturing or product defect5.5%920
  • Other0.1%12

13,775 reports say if the event was serious. 59.1% of them have the serious flag. The person who sends the report sets the flag.

Show age, weight, breed and route

Age of the animal

  • Under 1 year10.9%1,828
  • 1 to 3 years18.1%3,041
  • 4 to 7 years20.1%3,384
  • 8 to 11 years20.7%3,481
  • 12 years and over19.5%3,271
  • Age not given10.7%1,802

Weight of the animal

  • Under 5 kg (11 lb)23.9%4,011
  • 5 to 9.9 kg (11 to 22 lb)24.3%4,088
  • 10 to 24.9 kg (22 to 55 lb)19%3,200
  • 25 to 44.9 kg (55 to 99 lb)17%2,865
  • 45 kg and over (99 lb and over)2.2%362
  • Weight not given13.6%2,281

Breed, where the report gives one breed

A breed with many animals has many reports.

Route in the report

  • Subcutaneous37.3%6,270
  • Oral25.5%4,290
  • Intravenous7.4%1,246
  • Parenteral2%337
  • Other0.5%87
  • Intramuscular0.3%54

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.

Brand names

  • Cerenia

What the Green Book records give

Applications with an approval in force
6
Approved species
Dogs, Cats
Dose forms
Tablet, Chewable Tablets, Injectable Solution, Liquid (Solution)
Routes
Oral, Intravenous, Subcutaneous
Sale
RX (prescription)
Earliest approval date in the records

The species, dose forms and routes are the words of the Green Book records for all the applications together. One product can have fewer. The label of a product gives its approved use.

Applications in the Green Book of 2 Nov 2026, pioneer applications (NADA) first
Brand nameActive ingredientsSponsorApproved speciesApplication
Cerenia TabletsMaropitantZoetis Inc.DogsNADA 141-262
Cerenia Injectable SolutionMaropitantZoetis Inc.Dogs, CatsNADA 141-263
Maropitant CitrateMaropitantDechra Veterinary Products LLCDogs, CatsANADA 200-710
Maropitant CitrateMaropitantZyVet Animal Health, Inc.DogsANADA 200-747
Maropitant Citrate TabletsMaropitantFelix Pharmaceuticals Pvt. Ltd.DogsANADA 200-785
Maropitant Citrate TabletsMaropitantFelix Pharmaceuticals Pvt. Ltd.DogsANADA 200-833

Next in the A to Z list

All drugs by active ingredient. Brand names A to Z

FDA pages for this drug

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

Cite this page

Pet Drug Reports. Maropitant: adverse event reports that FDA received. https://petdrugreports.com/drug/maropitant/ Source: FDA Center for Veterinary Medicine, openFDA Animal and Veterinary adverse event reports, export of . Reports received through .

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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 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 1,951 reports in the 12 months to June 2026. It received 1,934 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 16,807 reports received from May 2007 to June 2026, 84.2% are about a safety issue only. 10.3% are about a lack of expected effectiveness, alone or with a safety issue. 5.5% are about a defect of the product or its package.