Drug profile

The FDA adverse-event record for S-Adenosyl-Methione

36 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference S-Adenosyl-Methione. See the species affected, top reactions, and outcomes below.

36
adverse-event reports
2.8%
death-coded share
Dog
most-reported species
11
Emesis - 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.
36
Total Reports
1
Deaths Reported
2.8%
Death Rate

Active Ingredients

S-Adenosyl-Methione

Administration Routes

OralUnknown

Species Affected

Dog 36

Most Affected Breeds

Retriever - Labrador 8
Schnauzer - Miniature 3
Shih Tzu 2
Terrier - Yorkshire 2
Maltese 2
Boxer (German Boxer) 2
Terrier - Boston 1
Terrier - Jack Russell 1
Poodle (unspecified) 1
Crossbred Canine/dog 1

Most Reported Reactions

Emesis 11
Vomiting 9
Lack of efficacy - NOS 5
Elevated liver enzymes 4
Diarrhoea 2
Lack of efficacy (endoparasite) - hookworm 2
INEFFECTIVE, ASCARIDS NOS 2
Lethargy (see also Central nervous system depression in 'Neurological') 2
INEFFECTIVE, HEARTWORM LARVAE 2
Weight loss 2
Elevated alanine aminotransferase (ALT) 2
Elevated renal parameters 2

Outcome Breakdown

Recovered/Normal
21 (58.3%)
Ongoing
7 (19.4%)
Outcome Unknown
6 (16.7%)
Died
1 (2.8%)
Recovered with Sequela
1 (2.8%)

S-Adenosyl-Methione Adverse Event Insights

36 reports name S-Adenosyl-Methione; 1 recorded a death outcome (2.8% of reported events, not a population-level mortality rate). Active ingredient: S-Adenosyl-Methione. Administration routes: Oral, Unknown.

By species: Dog (36 reports). By breed: Retriever - Labrador (8), Schnauzer - Miniature (3), Shih Tzu (2).

Leading clinical signs: Emesis (11), Vomiting (9), Lack of efficacy - NOS (5), Elevated liver enzymes (4). Outcome, 36 coded reports: Recovered/Normal 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.