Drug profile

The FDA adverse-event record for S-Adenosylmethionine/ Silybin

14 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference S-Adenosylmethionine/ Silybin. See the species affected, top reactions, and outcomes below.

14
adverse-event reports
7.1%
death-coded share
Dog
most-reported species
4
Other abnormal test result 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.
14
Total Reports
1
Deaths Reported
7.1%
Death Rate

Active Ingredients

S-Adenosylmethionine/ Silybin

Administration Routes

Oral

Species Affected

Dog 13
Cat 1

Most Affected Breeds

Terrier - Yorkshire 2
Pekingese 1
Spitz - German Pomeranian 1
Crossbred Canine/dog 1
Terrier - Tibetan 1
Maltese 1
Terrier - Jack Russell 1
Shepherd Dog - Australian 1
Retriever - Labrador 1
Pug 1

Most Reported Reactions

Other abnormal test result NOS 4
Emesis 4
Elevated alanine aminotransferase (ALT) 3
Lethargy (see also Central nervous system depression in 'Neurological') 3
Elevated serum alkaline phosphatase (SAP) 3
Diarrhoea 2
Tense abdomen 2
Decreased appetite 2
Elevated liver enzymes 2
Elevated aspartate aminotransferase (AST) 2
Elevated bile acids 1
Hyperpigmentation 1

Outcome Breakdown

Ongoing
9 (64.3%)
Recovered/Normal
4 (28.6%)
Euthanized
1 (7.1%)

S-Adenosylmethionine/ Silybin Adverse Event Insights

14 reports name S-Adenosylmethionine/ Silybin; 1 recorded a death outcome (7.1% of reported events, not a population-level mortality rate). Active ingredient: S-Adenosylmethionine/ Silybin. Administration route: Oral.

By species: Dog (13 reports), Cat (1 reports). By breed: Terrier - Yorkshire (2), Pekingese (1), Spitz - German Pomeranian (1).

Leading clinical signs: Other abnormal test result NOS (4), Emesis (4), Elevated alanine aminotransferase (ALT) (3), Lethargy (see also Central nervous system depression in 'Neurological') (3). Outcome, 14 coded reports: Ongoing leads at 64.3%.

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.