Monocytosis after Gabapentin in dogs

164 reports to the FDA describe monocytosis in dogs given Gabapentin. That is 1.8% of all reports for this medicine, compared with 0.3% across reports for all dog medicines, so it is reported unusually often with this medicine.

164Reports

88%Marked serious

5.5%Recovered

39%Died or euthanised

7 daysTypical onset

How soon it started

Same day

17 12%

1–2 days

23 17%

3–7 days

32 23%

1–4 weeks

25 18%

Over a month

40 29%

How the animals did

Recovered

8 4.9%

Recovered with lasting effects

1 0.6%

Still unwell when reported

59 36%

Died

22 13%

Euthanised

42 26%

Not known

32 20%

Problems reported at the same time

112 68%

101 62%

100 61%

81 49%

65 40%

65 40%

64 39%

63 38%

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 monocytosis in dogs?: 164 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 7 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).

Monocytosis with similar medicines

Monocytosis after Trazodone 56 reports · 2.2% of its reports

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