Drug profile

The FDA adverse-event record for Phenylpropanolamine Hydrochloride

884 adverse-event reports submitted to the FDA Center for Veterinary Medicine reference Phenylpropanolamine Hydrochloride. See the species affected, top reactions, and outcomes below.

884
adverse-event reports
3.5%
death-coded share
Dog
most-reported species
291
Lack of efficacy - 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.
884
Total Reports
31
Deaths Reported
3.5%
Death Rate

Active Ingredients

Phenylpropanolamine Hydrochloride

Administration Routes

OralUnknownOther

Species Affected

Dog 824
Unknown 55
Human 2
Other 2
Dormouse 1

Most Affected Breeds

Retriever - Labrador 109
Unknown 67
Shepherd Dog - German 59
Dog (unknown) 36
Crossbred Canine/dog 35
Boxer (German Boxer) 35
Pit Bull 31
Doberman Pinscher 25
Collie - Border 24
Siberian Husky 22

Most Reported Reactions

Lack of efficacy - NOS 291
Vomiting 141
Panting 101
Diarrhoea 85
Lethargy (see also Central nervous system depression in 'Neurological') 67
Emesis (multiple) 60
Behavioural disorder NOS 48
Anorexia 43
Lethargy (see also Central nervous system depression in Neurological) 43
Restlessness 37
Agitation 36
Underfilling, Package 32

Outcome Breakdown

Outcome Unknown
393 (47.3%)
Recovered/Normal
338 (40.7%)
Ongoing
59 (7.1%)
Euthanized
18 (2.2%)
Died
13 (1.6%)
Recovered with Sequela
9 (1.1%)

Phenylpropanolamine Hydrochloride Adverse Event Insights

884 reports name Phenylpropanolamine Hydrochloride; 31 recorded a death outcome (3.5% of reported events, not a population-level mortality rate). Active ingredient: Phenylpropanolamine Hydrochloride. Administration routes: Oral, Unknown, Other.

By species: Dog (824 reports), Unknown (55 reports), Human (2 reports). By breed: Retriever - Labrador (109), Unknown (67), Shepherd Dog - German (59).

Leading clinical signs: Lack of efficacy - NOS (291), Vomiting (141), Panting (101), Diarrhoea (85). Outcome, 830 coded reports: Outcome Unknown leads at 47.3%.

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.