Didn't work as expected after Phenobarbital in dogs

174 reports to the FDA describe didn't work as expected in dogs given Phenobarbital. That is 11% of all reports for this medicine, compared with 13% across reports for all dog medicines.

174Reports

33%Marked serious

8.0%Recovered

10%Died or euthanised

57 daysTypical onset

How soon it started

Same day

11 15%

1–2 days

3 4.1%

3–7 days

3 4.1%

1–4 weeks

12 16%

Over a month

45 61%

How the animals did

Recovered

11 6.3%

Recovered with lasting effects

3 1.7%

Still unwell when reported

59 34%

Died

9 5.2%

Euthanised

9 5.2%

Not known

83 48%

Problems reported at the same time

26 15%

17 9.8%

16 9.2%

16 9.2%

14 8.0%

13 7.5%

11 6.3%

11 6.3%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Type: medicine.

Questions owners ask

Can Phenobarbital cause didn't work as expected in dogs?: 174 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 57 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 work as expected with similar medicines

Didn't work as expected after Melarsomine (Immiticide) 646 reports · 2.8% of its reports
Didn't work as expected after Polysulfated Glycosaminoglycan 698 reports · 13% of its reports
Didn't work as expected after Diphenhydramine 585 reports · 12% of its reports
Didn't work as expected after Butorphanol 1,022 reports · 23% of its reports
Didn't work as expected after Cefpodoxime 671 reports · 17% of its reports
Didn't work as expected after Tramadol 475 reports · 13% of its reports
Didn't work as expected after Florfenicol + Mometasone + Terbinafine 969 reports · 27% of its reports
Didn't work as expected after Desoxycorticosterone Pivalate 355 reports · 11% of its reports
Didn't work as expected after Propofol 600 reports · 20% of its reports
Didn't work as expected after Dirlotapide 712 reports · 25% of its reports

All reported side effects of Phenobarbital in dogs · Medicines most reported with didn't work as expected