Eprinomectin + Esafoxolaner + Praziquantel (NexGard Combo): adverse event reports that FDA received
Combination of 3 active ingredients
The name in brackets is a brand name with these active ingredients.
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.
Contacting a veterinarianHow to report to FDAFrom May 2023 to June 2026, FDA received 3,445 adverse event reports that name a drug with eprinomectin, esafoxolaner and praziquantel as its active ingredients. Of the 3,445 reports, 3,247 (94.3%) are about cats. 46 reports are about people who were exposed to the drug (1.3%).
In January to March 2026, FDA received 234 reports that name this drug. The signs that appear in the largest number of the 3,445 reports are "Lethargy", "Vomiting" and "Application site hair loss". A report is not proof that a drug caused a sign.
Reports that name this drug fell by 9.5% 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 94.3% 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 189 to 234.
- Cat: from 179 to 221.
January to March 2026 is the latest closed quarter in the data. In that quarter FDA received 234 reports that name eprinomectin + esafoxolaner + praziquantel: 1 dog, 221 cat, 0 horse, 12 other or not given.
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 3,445 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.
- Lethargy[unusually tired or inactive]15.4%531 reports
- Vomiting12.2%419 reports
- Application site hair loss[hair loss where the product was applied]8.6%296 reports
- Hypersalivation[drooling]8.5%292 reports
- Foaming at the mouth7.4%255 reports
- Drooling6.3%218 reports
- Not eating6.3%217 reports
- Lack of efficacy (ectoparasite) - flea[the product did not have the expected effect: fleas]6.2%213 reports
- Ataxia[unsteady, uncoordinated movement]6%205 reports
- Accidental exposure[exposure that was not intended]5.6%193 reports
- Lack of efficacy (endoparasite) - roundworm NOS[the product did not have the expected effect: roundworms]5.1%176 reports
- Lack of efficacy (endoparasite) - tapeworm[the product did not have the expected effect: tapeworms]4.9%169 reports
- Death by euthanasia[the animal was euthanized]3.9%133 reports
- Hiding3.8%132 reports
Show the next 16 signs
- Seizure NOS[seizure, type not specified]3.7%128 reports
- Behavioural disorder NOS[behaviour change, type not specified]3.6%125 reports
- Tremor3.4%116 reports
- Diarrhoea[diarrhea]3.3%113 reports
- Death3.3%112 reports
- Licking at application site3.2%110 reports
- Dilated pupils3%102 reports
- Anorexia[not eating]2.8%98 reports
- Hyperglycaemia[high blood sugar]2.5%86 reports
- Incorrect route of drug administration2.5%85 reports
- Vocalisation[crying out or unusual noise]2.4%82 reports
- Twitching2.4%81 reports
- Decreased appetite2.3%80 reports
- Not drinking2.1%71 reports
- Inappetence[reduced appetite]2%69 reports
- Fever1.9%66 reports
The list shows 30 of 952 coded signs. A report is not proof that a drug caused a sign. Download all signs (CSV)
Reports by species
The share is of all 3,445 reports that name eprinomectin + esafoxolaner + praziquantel. The other reports give a different species or no species.
Reports for each month, Jul 2021 to Jun 2026
No chart: no month has 5 or more 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
| Year | Dog | Cat | Horse | Other or not given | All species |
|---|---|---|---|---|---|
| 2026 | 2 | 415 | 0 | 23 | 440 |
| 2025 | 4 | 1,051 | 0 | 51 | 1,106 |
| 2024 | 7 | 1,199 | 0 | 69 | 1,275 |
| 2023 | 6 | 582 | 0 | 36 | 624 |
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/Normal27%929
- Recovered with Sequela[recovered, with a lasting effect]0.1%5
- Ongoing8%277
- Died3.7%129
- Euthanized3.8%130
- Outcome Unknown53.9%1,857
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 3,445 reports that name eprinomectin + esafoxolaner + praziquantel.
A report about more than one animal can have more than one outcome.
Kind of report
- Safety issue75.5%2,601
- Lack of expected effectiveness17.3%597
- Both safety and lack of expected effectiveness2.3%78
- Manufacturing or product defect4.8%166
- Other0.1%3
3,308 reports say if the event was serious. 14.8% 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 year23.8%821
- 1 to 3 years25.7%884
- 4 to 7 years16.4%565
- 8 to 11 years10.9%374
- 12 years and over9.7%335
- Age not given13.5%466
Weight of the animal
- Under 5 kg (11 lb)59.5%2,050
- 5 to 9.9 kg (11 to 22 lb)24.9%858
- 10 to 24.9 kg (22 to 55 lb)0.4%14
- 25 to 44.9 kg (55 to 99 lb)0%0
- 45 kg and over (99 lb and over)0.8%27
- Weight not given14.4%496
Breed, where the report gives one breed
- Domestic Shorthair57.1%1,968
- Domestic Longhair6.7%230
- Domestic Mediumhair5.7%197
- Siamese1%35
- Maine Coon1%34
- Ragdoll0.8%29
- American Shorthair0.5%18
- Persian0.5%16
A breed with many animals has many reports.
Route in the report
- Topical79.9%2,753
- Oral5.8%199
- Ophthalmic0.3%11
- Subcutaneous0.2%6
- Intraocular0.1%4
- Parenteralunder 0.1%1
Each bar is on a scale of 0 to 100%.
Approved animal drugs with these active ingredients (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
- NexGard Combo
What the Green Book records give
- Applications with an approval in force
- 1
- Approved species
- Cats
- Dose forms
- Topical Solution
- Routes
- Topical
- 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.
| Brand name | Active ingredients | Sponsor | Approved species | Application |
|---|---|---|---|---|
| NexGard Combo | Eprinomectin, Esafoxolaner, Praziquantel | Boehringer Ingelheim Animal Health USA, Inc. | Cats | NADA 141-570 |
Other pages with one of these ingredients
A report names a drug by its set of active ingredients. Each set has its own page. The list is in order of name.
- Eprinomectin, all combinations
- Praziquantel, all combinations
- Emodepside + Praziquantel
- Eprinomectin
- Eprinomectin + Praziquantel
- Febantel + Praziquantel + Pyrantel Pamoate
- Ivermectin + Praziquantel
- Ivermectin + Praziquantel + Pyrantel Pamoate
- Lotilaner + Moxidectin + Praziquantel + Pyrantel Pamoate
- Lufenuron + Milbemycin Oxime + Praziquantel
- Lufenuron + Praziquantel
- Milbemycin Oxime + Praziquantel
- Praziquantel
- Praziquantel + Pyrantel Pamoate
Next in the A to Z list
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.
- Green Book record of NADA 141-570The FDA record of the application for NexGard Combo.
- Animal Drugs @ FDAThe search page of the Green Book, the FDA list of approved animal drugs.
The site checked these addresses on . The links open in a new tab.
Cite this page
Pet Drug Reports. Eprinomectin + Esafoxolaner + Praziquantel: adverse event reports that FDA received. https://petdrugreports.com/drug/eprinomectin-esafoxolaner-praziquantel/ 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 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 these active ingredients.
- 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 1,062 reports in the 12 months to June 2026. It received 1,173 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 3,445 reports received from May 2023 to June 2026, 75.5% are about a safety issue only. 19.6% are about a lack of expected effectiveness, alone or with a safety issue. 4.8% are about a defect of the product or its package.