Drug profile

The FDA adverse-event record for Penicillin G Procaine

192 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Penicillin G Procaine. See the species affected, top reactions, and outcomes below.

192
adverse-event reports
6.8%
death-coded share
Unknown
most-reported species
71
Suspension, Abnormal - 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.
192
Total Reports
13
Deaths Reported
6.8%
Death Rate

Active Ingredients

Penicillin G Procaine

Administration Routes

UnknownSubcutaneousIntramuscularIntravenousParenteralOralOphthalmic

Species Affected

Unknown 120
Dog 40
Horse 11
Cattle 8
Cat 7
Pig 4
Other 1
Rabbit 1

Most Affected Breeds

Unknown 125
Holstein-Friesian also known as Holstein 6
Dog (unknown) 5
Quarter Horse 4
Domestic Shorthair 4
Terrier - Bull - American Pit 3
Chihuahua 3
Crossbred Porcine/Pig 2
Thoroughbred 2
Cat (unknown) 2

Most Reported Reactions

Suspension, Abnormal 71
Injection site abscess 11
Death 10
Missing Labels 8
Injection site pain 6
Injection site seroma 6
Dyspnoea 6
Product Defect, General 6
Lethargy (see also Central nervous system depression in 'Neurological') 6
Leucocytosis NOS 5
Anorexia 5
Lot # and /or Expiration date missing 5

Outcome Breakdown

Recovered/Normal
32 (46.4%)
Outcome Unknown
15 (21.7%)
Died
12 (17.4%)
Ongoing
6 (8.7%)
Recovered with Sequela
3 (4.3%)
Euthanized
1 (1.4%)

Penicillin G Procaine Adverse Event Insights

192 reports name Penicillin G Procaine; 13 recorded a death outcome (6.8% of reported events, not a population-level mortality rate). Active ingredient: Penicillin G Procaine. Administration routes: Unknown, Subcutaneous, Intramuscular, Intravenous.

By species: Unknown (120 reports), Dog (40 reports), Horse (11 reports). By breed: Unknown (125), Holstein-Friesian also known as Holstein (6), Dog (unknown) (5).

Leading clinical signs: Suspension, Abnormal (71), Injection site abscess (11), Death (10), Missing Labels (8). Outcome, 69 coded reports: Recovered/Normal leads at 46.4%.

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.