Lethargy after Gabapentin in cats

342 reports to the FDA describe lethargy in cats given Gabapentin. That is 17% of all reports for this medicine, compared with 14% across reports for all cat medicines.

342Reports

69%Marked serious

19%Recovered

24%Died or euthanised

5 daysTypical onset

How soon it started

Same day

82 27%

1–2 days

45 15%

3–7 days

48 16%

1–4 weeks

60 20%

Over a month

69 23%

How the animals did

Recovered

66 19%

Still unwell when reported

139 41%

Died

33 9.6%

Euthanised

49 14%

Not known

55 16%

Problems reported at the same time

212 62%

89 26%

79 23%

69 20%

57 17%

56 16%

54 16%

49 14%

Age of the animals

Under 1 year

1–3 years

4–7 years

8–11 years

12+ years

145

About this medicine

Gabapentin used for pain and to reduce stress or anxiety.

Questions owners ask

Can Gabapentin cause lethargy in cats?: 342 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 5 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).

Lethargy with similar medicines

Lethargy after Fluoxetine 38 reports · 16% of its reports
Lethargy after Clomipramine (Clomicalm) 35 reports · 28% of its reports

All reported side effects of Gabapentin in cats · Medicines most reported with lethargy