Drug profile

The FDA adverse-event record for Sentinel

88 FDA reports name Sentinel, a high-volume drug in the CVM extract. Species, reactions, and outcomes follow.

#833 of 2,679
by report volume (all drugs)
88
adverse-event reports
5.7%
death-coded share
Dog
most-reported species

Corpus placement

According to the FDA Center for Veterinary Medicine openFDA adverse-event extract, Sentinel ranks #827 of 2679 by total reports (88) and #750 of 1130 by death-coded share (5.7%). National dual: Milbemycin Oxime + Spinosad is #1 of 2679 drugs by total adverse-event reports (149,624) at death-coded-share rank 965 of 1130 drugs with at least 50 reports (2.3%); separately, Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) is #1 highest death-coded share at 97.8% (report rank #821).

149,624
Milbemycin Oxime + Spinosad reports (#1)
97.8%
Atlantic Salmon Transgenic Whole (Opafp-Ghc2 Rdna Construct Inserted Into The A-Locus In The Eo-1A Lineage) death share (#1)
#827
This drug, reports of 2679
#750
This drug, death share of 1130

Report volume reflects how common a breed or drug is and how often owners and vets file — not actual risk. Death-coded share ranks are limited to entries with enough reports to be meaningful. The two maps do not agree at #1.

Release-over-release change

What changed in the latest FDA data snapshot

PlainBreed reconstructed the prior snapshot from dated openFDA partitions through 2025 Q4, then compared it with the 2026-07-27 openFDA export. Sentinel has 88 reports now versus 87 in that prior snapshot: 1 more (1.1%).

Report change
+1
Death-coded reports
+0
Death-coded share
−0.1 pts

This compares reported-event counts in two source snapshots. It does not establish a change in real-world risk, product safety, or disease incidence.

Subscribe to Sentinel changes

Signature read: 88 reports place Sentinel in the upper third of FDA AER volume (#833 of 2,679).

Important: Adverse event reports do not establish that a drug caused or contributed to the event. Consult your veterinarian before making treatment decisions.
88
Total Reports
5
Deaths Reported
5.7%
Death-coded share of reports

Active Ingredients

Sentinel

Administration Routes

OralUnknown

Species Affected

Dog 88

Most Affected Breeds

Crossbred Canine/dog 11
Retriever - Labrador 10
Retriever - Golden 7
Shepherd Dog - German 7
Chihuahua 5
Terrier (unspecified) 4
Whippet 4
Bulldog - French 3
Shih Tzu 3
Samoyed 3

Most Reported Reactions

Lack of efficacy (endoparasite) - heartworm 24
Vomiting 11
Diarrhoea 10
Weakness 8
Walking difficulty 6
Decreased appetite 5
Emesis (multiple) 5
Ataxia 5
Death by euthanasia 5
Lethargy (see also Central nervous system depression in 'Neurological') 4
Other abnormal test result NOS 4
Not eating 4

Outcome Breakdown

Ongoing
55 (62.5%)
Recovered/Normal
21 (23.9%)
Outcome Unknown
7 (8.0%)
Euthanized
5 (5.7%)

Sentinel: low death-coded share in the FDA AER row

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.

High-volume nationwide drug peers

Two openFDA-derived peer sets for Sentinel, both floored at ≥50 reports so the neighborhoods stay in the advertised mass.

Similar report volume

Nearest other drugs by FDA report count (88 here).

What to do with this drug

A report does not prove a drug caused the reaction; consult a veterinarian before acting on this data.

Source: FDA Center for Veterinary Medicine openFDA Animal & Veterinary Adverse Events (CVM AER) · 2025

openFDA Animal & Veterinary Adverse Events (FDA CVM) for Sentinel (#833 of 2,679 by report volume); death-coded 5.7%. PlainBreed drug row · report volume stamp 88 · vintage 2025.

Informational only. FDA adverse-event reports are voluntary and do not prove causation; consult a veterinarian before acting on them. Verify with FDA CVM →