Drug profile

The FDA adverse-event record for Fluralaner 13.64% 12-Week Chew

26,358 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Fluralaner 13.64% 12-Week Chew. See the species affected, top reactions, and outcomes below.

26,358
adverse-event reports
2.5%
death-coded share
Dog
most-reported species
7,207
Lack of efficacy (ectoparasite) - flea - top reaction
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Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
26,358
Total Reports
667
Deaths Reported
2.5%
Death Rate

Active Ingredients

Fluralaner 13.64% 12-Week Chew

Administration Routes

OralUnknownTopicalOtherDentalImmersionOropharyngealRectal

Species Affected

Dog 24,519
Unknown 1,758
Cat 40
Human 32
Goat 3
Fox 2
Horse 1
Other 1
Chicken 1
Other Canids 1

Most Affected Breeds

Crossbred Canine/dog 6,200
Unknown 1,834
Retriever - Labrador 1,782
Dog (unknown) 1,372
Retriever - Golden 955
Chihuahua 910
Shepherd Dog - German 883
Shih Tzu 727
Terrier - Yorkshire 720
Shepherd Dog - Australian 636

Most Reported Reactions

Lack of efficacy (ectoparasite) - flea 7,207
Vomiting 6,194
Lack of efficacy (ectoparasite) - tick NOS 2,804
Emesis (multiple) 1,982
Seizure NOS 1,287
Diarrhoea 1,254
UNPALATABLE 1,207
Lethargy (see also Central nervous system depression in 'Neurological') 1,121
Product Defect, General 1,049
Lack of efficacy (bacteria) - Borrelia 892
Lack of efficacy (bacteria) - NOS 857
Drug administration error 720

Outcome Breakdown

Ongoing
14,359 (58.3%)
Recovered/Normal
8,261 (33.6%)
Outcome Unknown
1,096 (4.5%)
Euthanized
339 (1.4%)
Died
328 (1.3%)
Recovered with Sequela
235 (1.0%)

Fluralaner 13.64% 12-Week Chew Adverse Event Insights

26,358 reports name Fluralaner 13.64% 12-Week Chew; 667 recorded a death outcome (2.5% of reported events, not a population-level mortality rate). Active ingredient: Fluralaner 13.64% 12-Week Chew. Administration routes: Oral, Unknown, Topical, Other.

By species: Dog (24,519 reports), Unknown (1,758 reports), Cat (40 reports). By breed: Crossbred Canine/dog (6,200), Unknown (1,834), Retriever - Labrador (1,782).

Leading clinical signs: Lack of efficacy (ectoparasite) - flea (7,207), Vomiting (6,194), Lack of efficacy (ectoparasite) - tick NOS (2,804), Emesis (multiple) (1,982). Outcome, 24,618 coded reports: Ongoing leads at 58.3%.

Read these counts as reporting volume, not risk: per our methodology, a widely-prescribed drug will rack up more raw FDA reports in a given year than a rarely-used one at an identical true rate, so we recommend comparing within similar-exposure products rather than across the full 2025 catalog.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

Every figure on PlainBreed is rendered directly from FDA openFDA adverse event data, no number is typed in by an editor. This page draws directly on FDA openFDA data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.