Didn't stop worms after Epsiprantel in dogs

The FDA has received 271 reports of didn't stop worms in dogs after Epsiprantel. That is 64% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

271Reports

13%Marked serious

4.1%Recovered

0.4%Died or euthanised

22 daysTypical onset

How soon it started

Same day

7 8.0%

1–2 days

6 6.9%

3–7 days

7 8.0%

1–4 weeks

35 40%

Over a month

32 37%

How the animals did

Recovered

11 4.1%

Still unwell when reported

69 25%

Died

1 0.4%

Not known

190 70%

Problems reported at the same time

Overdose

20 7.4%

Didn't work as expected

18 6.6%

Vomiting

7 2.6%

Diarrhea

7 2.6%

Drug dose administration interval too short

6 2.2%

Underdose

6 2.2%

Loss of appetite

5 1.8%

Incorrect dose administered

5 1.8%

Age of the animals

Under 1 year

109

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Epsiprantel cause didn't stop worms in dogs?: 271 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 22 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 Melarsomine (Immiticide) 67 reports · 0.3% of its reports
Didn't stop worms after Diphenhydramine 24 reports · 0.5% of its reports
Didn't stop worms after Cefpodoxime 30 reports · 0.7% of its reports
Didn't stop worms after Tramadol 40 reports · 1.1% of its reports
Didn't stop worms after Cephalexin 24 reports · 0.9% of its reports
Didn't stop worms after Chondroitin + Glucosamine 47 reports · 1.8% of its reports
Didn't stop worms after Glucosamine 46 reports · 2.5% of its reports
Didn't stop worms after Enalapril 25 reports · 1.5% of its reports
Didn't stop worms after Phenobarbital 22 reports · 1.4% of its reports
Didn't stop worms after Fish Oil 29 reports · 1.9% of its reports

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