Drug profile

The FDA adverse-event record for Anti-Seizure Medication (Unknown)

41 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Anti-Seizure Medication (Unknown). See the species affected, top reactions, and outcomes below.

41
adverse-event reports
14.6%
death-coded share
Dog
most-reported species
17
Seizure NOS - 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.
41
Total Reports
6
Deaths Reported
14.6%
Death Rate

Active Ingredients

Anti-Seizure Medication (Unknown)

Administration Routes

UnknownOral

Species Affected

Dog 39
Cat 2

Most Affected Breeds

Crossbred Canine/dog 5
Dog (unknown) 3
Spitz - German Pomeranian 2
Terrier - Yorkshire 2
Domestic Shorthair 2
Boxer (German Boxer) 2
Chihuahua 2
Siberian Husky 2
Collie - Border 2
Shepherd Dog - German 2

Most Reported Reactions

Seizure NOS 17
Behavioural disorder NOS 7
Lethargy (see also Central nervous system depression in 'Neurological') 6
Emesis 4
Death by euthanasia 4
Diarrhoea 4
Ataxia 3
Lack of efficacy (ectoparasite) - flea 3
Decreased appetite 3
Lack of efficacy - NOS 2
Depression 2
Vomiting 2

Outcome Breakdown

Outcome Unknown
14 (34.1%)
Recovered/Normal
11 (26.8%)
Ongoing
10 (24.4%)
Euthanized
4 (9.8%)
Died
2 (4.9%)

Anti-Seizure Medication (Unknown) Adverse Event Insights

41 reports name Anti-Seizure Medication (Unknown); 6 recorded a death outcome (14.6% of reported events, not a population-level mortality rate). Active ingredient: Anti-Seizure Medication (Unknown). Administration routes: Unknown, Oral.

By species: Dog (39 reports), Cat (2 reports). By breed: Crossbred Canine/dog (5), Dog (unknown) (3), Spitz - German Pomeranian (2).

Leading clinical signs: Seizure NOS (17), Behavioural disorder NOS (7), Lethargy (see also Central nervous system depression in 'Neurological') (6), Emesis (4). Outcome, 41 coded reports: Outcome Unknown leads at 34.1%.

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.