Drug profile

The FDA adverse-event record for Imidacloprid + Moxidectin

18,782 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Imidacloprid + Moxidectin. See the species affected, top reactions, and outcomes below.

18,782
adverse-event reports
4.0%
death-coded share
Dog
most-reported species
2,397
Lethargy (see also Central nervous system depression in 'Neurological') - 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.
18,782
Total Reports
753
Deaths Reported
4.0%
Death Rate

Active Ingredients

ImidaclopridImidacloprid + MoxidectinMoxidectin

Administration Routes

TopicalUnknownOralOtherOphthalmicRespiratory (Inhalation)SubcutaneousTransdermalAuricular (Otic)Cutaneous

Species Affected

Dog 10,582
Cat 6,400
Unknown 1,347
Human 378
Rabbit 36
Ferret 19
Cockatiel 7
Wolf 6
Leopard 2
Mouse 2

Most Affected Breeds

Domestic Shorthair 3,794
Unknown 1,789
Retriever - Labrador 996
Cat (unknown) 927
Crossbred Canine/dog 680
Dog (unknown) 627
Chihuahua 603
Domestic Longhair 596
Terrier - Yorkshire 568
Shih Tzu 457

Most Reported Reactions

Lethargy (see also Central nervous system depression in 'Neurological') 2,397
Pruritus 2,282
Lack of efficacy (ectoparasite) - flea 2,253
Behavioural disorder NOS 1,768
Vomiting 1,503
Hypersalivation 1,096
Diarrhoea 1,027
Anorexia 986
Other abnormal test result NOS 964
Application site alopecia 900
Underfilling, Tubes 787
Ataxia 771

Outcome Breakdown

Outcome Unknown
9,187 (52.7%)
Recovered/Normal
6,881 (39.5%)
Ongoing
577 (3.3%)
Died
460 (2.6%)
Euthanized
293 (1.7%)
Recovered with Sequela
42 (0.2%)

Imidacloprid + Moxidectin Adverse Event Insights

18,782 reports name Imidacloprid + Moxidectin; 753 recorded a death outcome (4.0% of reported events, not a population-level mortality rate). Active ingredients: Imidacloprid, Imidacloprid + Moxidectin, Moxidectin. Administration routes: Topical, Unknown, Oral, Other.

By species: Dog (10,582 reports), Cat (6,400 reports), Unknown (1,347 reports). By breed: Domestic Shorthair (3,794), Unknown (1,789), Retriever - Labrador (996).

Leading clinical signs: Lethargy (see also Central nervous system depression in 'Neurological') (2,397), Pruritus (2,282), Lack of efficacy (ectoparasite) - flea (2,253), Behavioural disorder NOS (1,768). Outcome, 17,440 coded reports: Outcome Unknown leads at 52.7%.

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.