Drug profile

The FDA adverse-event record for Hyposensitization Injections

31 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Hyposensitization Injections. See the species affected, top reactions, and outcomes below.

31
adverse-event reports
9.7%
death-coded share
Dog
most-reported species
9
Vomiting - 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.
31
Total Reports
3
Deaths Reported
9.7%
Death Rate

Active Ingredients

Hyposensitization Injections

Administration Routes

UnknownParenteralSubcutaneous

Species Affected

Dog 29
Cat 2

Most Affected Breeds

Retriever - Labrador 9
Crossbred Canine/dog 2
Bichon Frise 2
Chihuahua 2
Terrier - Jack Russell 1
Terrier - West Highland White 1
Pit Bull 1
Lhasa Apso 1
Akita 1
Beagle 1

Most Reported Reactions

Vomiting 9
Lack of efficacy - NOS 6
Other abnormal test result NOS 4
Anorexia 4
Elevated serum alkaline phosphatase (SAP) 3
Diarrhoea 3
Weight loss 3
Elevated alanine aminotransferase (ALT) 3
INEFFECTIVE, HEARTWORM LARVAE 2
Itching 2
Reddening of the skin 2
Seizure NOS 2

Outcome Breakdown

Recovered/Normal
10 (32.3%)
Outcome Unknown
8 (25.8%)
Ongoing
8 (25.8%)
Recovered with Sequela
2 (6.5%)
Euthanized
2 (6.5%)
Died
1 (3.2%)

Hyposensitization Injections Adverse Event Insights

31 reports name Hyposensitization Injections; 3 recorded a death outcome (9.7% of reported events, not a population-level mortality rate). Active ingredient: Hyposensitization Injections. Administration routes: Unknown, Parenteral, Subcutaneous.

By species: Dog (29 reports), Cat (2 reports). By breed: Retriever - Labrador (9), Crossbred Canine/dog (2), Bichon Frise (2).

Leading clinical signs: Vomiting (9), Lack of efficacy - NOS (6), Other abnormal test result NOS (4), Anorexia (4). Outcome, 31 coded reports: Recovered/Normal leads at 32.3%.

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.