Drug profile

The FDA adverse-event record for Unspecified Flea Collar

50 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Unspecified Flea Collar. See the species affected, top reactions, and outcomes below.

50
adverse-event reports
2.0%
death-coded share
Cat
most-reported species
35
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.
50
Total Reports
1
Deaths Reported
2.0%
Death Rate

Active Ingredients

Unspecified Flea Collar

Administration Routes

TopicalUnknown

Species Affected

Cat 27
Dog 23

Most Affected Breeds

Cat (unknown) 10
Domestic Shorthair 10
Maine Coon 3
Retriever - Golden 3
Shepherd Dog - Australian 2
Domestic Mediumhair 2
Shepherd Dog (unspecified) 2
Dog (unknown) 2
Dachshund - Miniature 2
Chihuahua 2

Most Reported Reactions

Lack of efficacy (ectoparasite) - flea 35
Diarrhoea 4
Pruritus 4
Lack of efficacy (endoparasite) - tapeworm 3
INEFFECTIVE, WORMS NOS 2
Panting 2
Localised hair loss 2
Drug administration error 2
Lack of efficacy (ectoparasite) - tick NOS 2
Generalised itching 2
Biting - pruritus (see also 'Behavioural disorders') 2
Excessive chewing, licking and/or grooming 2

Outcome Breakdown

Outcome Unknown
45 (90.0%)
Recovered/Normal
3 (6.0%)
Ongoing
1 (2.0%)
Died
1 (2.0%)

Unspecified Flea Collar Adverse Event Insights

50 reports name Unspecified Flea Collar; 1 recorded a death outcome (2.0% of reported events, not a population-level mortality rate). Active ingredient: Unspecified Flea Collar. Administration routes: Topical, Unknown.

By species: Cat (27 reports), Dog (23 reports). By breed: Cat (unknown) (10), Domestic Shorthair (10), Maine Coon (3).

Leading clinical signs: Lack of efficacy (ectoparasite) - flea (35), Diarrhoea (4), Pruritus (4), Lack of efficacy (endoparasite) - tapeworm (3). Outcome, 50 coded reports: Outcome Unknown leads at 90.0%.

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.