Overdose after Cephalexin in cats

29 reports to the FDA describe overdose in cats given Cephalexin. That is 33% of all reports for this medicine, compared with 0.9% across reports for all cat medicines, so it is reported unusually often with this medicine.

29Reports

28%Marked serious

34%Recovered

0.0%Died or euthanised

Same dayTypical onset

How soon it started

Same day

18 90%

1–2 days

2 10%

3–7 days

0 0.0%

1–4 weeks

0 0.0%

Over a month

0 0.0%

How the animals did

Recovered

10 34%

Not known

19 66%

Problems reported at the same time

Accidental exposure

29 100%

Vomiting

27 93%

Kidney problems

5 17%

Crystalluria

4 14%

Lethargy

3 10%

Diarrhea

2 6.9%

Tremors

2 6.9%

Decreased urine concentration

2 6.9%

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 Cephalexin cause overdose in cats?: 29 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 the same day 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).

Overdose with similar medicines

Overdose after Methylprednisolone 21 reports · 1.3% of its reports

All reported side effects of Cephalexin in cats · Medicines most reported with overdose