Weight gain after Gabapentin in dogs

70 reports to the FDA describe weight gain in dogs given Gabapentin. That is 0.8% of all reports for this medicine, compared with 0.6% across reports for all dog medicines.

70Reports

57%Marked serious

4.3%Recovered

19%Died or euthanised

48 daysTypical onset

How soon it started

Same day

4 7.8%

1–2 days

8 16%

3–7 days

4 7.8%

1–4 weeks

8 16%

Over a month

27 53%

How the animals did

Recovered

3 4.3%

Still unwell when reported

23 33%

Died

7 10%

Euthanised

6 8.6%

Not known

31 44%

Problems reported at the same time

Liver problems

27 39%

Loss of appetite

25 36%

Didn't work as expected

20 29%

20 29%

19 27%

17 24%

14 20%

14 20%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

About this medicine

Gabapentin used for pain and to reduce stress or anxiety.

Questions owners ask

Can Gabapentin cause weight gain in dogs?: 70 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 48 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).

Weight gain with similar medicines

Weight gain after Fluoxetine 21 reports · 0.8% of its reports
Weight gain after Trazodone 38 reports · 1.5% of its reports

All reported side effects of Gabapentin in dogs · Medicines most reported with weight gain