Drug profile

The FDA adverse-event record for S-Adenosyl-Methionine (Same) + Silybin

19 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference S-Adenosyl-Methionine (Same) + Silybin. See the species affected, top reactions, and outcomes below.

19
adverse-event reports
15.8%
death-coded share
Dog
most-reported species
10
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.
19
Total Reports
3
Deaths Reported
15.8%
Death Rate

Active Ingredients

S-Adenosyl-Methionine (Same) + Silybin

Administration Routes

OralTopical

Species Affected

Dog 19

Most Affected Breeds

Terrier - Boston 2
Poodle - Miniature 2
Shih Tzu 2
Dachshund - Miniature 1
Brittany 1
Dog (other) 1
Schnauzer - Miniature 1
Crossbred Canine/dog 1
Retriever - Golden 1
Chihuahua 1

Most Reported Reactions

Lethargy (see also Central nervous system depression in 'Neurological') 10
Elevated serum alkaline phosphatase (SAP) 5
Decreased appetite 5
Anorexia 5
Diarrhoea 4
Hyperglycaemia 4
Elevated alanine aminotransferase (ALT) 3
Elevated blood urea nitrogen (BUN) 3
Hyponatremia 3
Elevated liver enzymes 3
Death by euthanasia 3
Underdose 3

Outcome Breakdown

Outcome Unknown
13 (68.4%)
Recovered/Normal
3 (15.8%)
Euthanized
3 (15.8%)

S-Adenosyl-Methionine (Same) + Silybin Adverse Event Insights

19 reports name S-Adenosyl-Methionine (Same) + Silybin; 3 recorded a death outcome (15.8% of reported events, not a population-level mortality rate). Active ingredient: S-Adenosyl-Methionine (Same) + Silybin. Administration routes: Oral, Topical.

By species: Dog (19 reports). By breed: Terrier - Boston (2), Poodle - Miniature (2), Shih Tzu (2).

Leading clinical signs: Lethargy (see also Central nervous system depression in 'Neurological') (10), Elevated serum alkaline phosphatase (SAP) (5), Decreased appetite (5), Anorexia (5). Outcome, 19 coded reports: Outcome Unknown leads at 68.4%.

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.