Lethargy after Amlodipine in cats

The FDA has received 71 reports of lethargy in cats after Amlodipine. That is 18% of all reports for this medicine, compared with 14% across reports for all cat medicines.

71Reports
55%Marked serious
20%Recovered
28%Died or euthanised
8 daysTypical onset
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How soon it started

Same day
14 24%
1–2 days
9 16%
3–7 days
4 6.9%
1–4 weeks
13 22%
Over a month
18 31%

How the animals did

Recovered
14 20%
Still unwell when reported
25 35%
Died
7 9.9%
Euthanised
13 18%
Not known
12 17%

Problems reported at the same time

Age of the animals

Under 1 year
0
1–3 years
0
4–7 years
3
8–11 years
7
12+ years
60

About this medicine

Type: medicine.

Questions owners ask

Can Amlodipine cause lethargy in cats?
71 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 8 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

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