Didn't stop worms after Phenylpropanolamine (Proin) in dogs

The FDA has received 39 reports of didn't stop worms in dogs after Phenylpropanolamine. That is 0.9% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported less often than average with this medicine.

39Reports

10%Marked serious

7.7%Recovered

2.6%Died or euthanised

275 daysTypical onset

How soon it started

Same day

0 0.0%

1–2 days

1 6.3%

3–7 days

0 0.0%

1–4 weeks

1 6.3%

Over a month

14 88%

How the animals did

Recovered

2 5.1%

Recovered with lasting effects

1 2.6%

Still unwell when reported

2 5.1%

Euthanised

1 2.6%

Not known

33 85%

Problems reported at the same time

Didn't work as expected

15 38%

Diarrhea

6 15%

Urinary incontinence

4 10%

Bone and joint disorder

2 5.1%

Weight loss

2 5.1%

Unclassifiable adverse event

2 5.1%

Gastroenteritis

1 2.6%

Malaise

1 2.6%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Phenylpropanolamine treats urinary incontinence.

Products with this ingredient include Proin. The FDA hides brand names in its public data, so these reports cover every product with the same active ingredients.

Questions owners ask

Can Phenylpropanolamine cause didn't stop worms in dogs?: 39 reports link the two, but a report alone does not prove the medicine was the cause: other illnesses, other medicines or coincidence can be involved. Your vet can judge it for your animal.
How soon after a dose was it reported?: In half of the reports with dates, it started within 275 days of the first dose.
What should I do?: Don't give another dose until you've spoken to your vet, and keep the packaging so you can tell them the product and dose. Your vet can also report it to the FDA (or you can, through the manufacturer or FDA form 1932a).

Didn't stop worms with similar medicines

Didn't stop worms after Levothyroxine 50 reports · 1.7% of its reports

All reported side effects of Phenylpropanolamine in dogs · Medicines most reported with didn't stop worms