Loss of appetite after Sildenafil in dogs

The FDA has received 20 reports of loss of appetite in dogs after Sildenafil. That is 29% of all reports for this medicine, compared with 8.4% across reports for all dog medicines, so it is reported unusually often with this medicine.

20Reports
45%Marked serious
20%Recovered
25%Died or euthanised
47 daysTypical onset
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How soon it started

Same day
2 13%
1–2 days
2 13%
3–7 days
1 6.7%
1–4 weeks
0 0.0%
Over a month
10 67%

How the animals did

Recovered
4 20%
Still unwell when reported
7 35%
Died
3 15%
Euthanised
2 10%
Not known
4 20%

Problems reported at the same time

Lethargy
7 35%
Kidney problems
6 30%
Breathing problems
5 25%
Death
5 25%
Tremors
4 20%
Hyperkalaemia
4 20%
Low sodium-potassium ratio (na:k ratio)
3 15%
Diarrhea
3 15%

Age of the animals

Under 1 year
0
1–3 years
0
4–7 years
1
8–11 years
5
12+ years
13

About this medicine

Type: medicine.

Questions owners ask

Can Sildenafil cause loss of appetite in dogs?
20 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 47 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).

Loss of appetite with similar medicines

All reported side effects of Sildenafil in dogs · Medicines most reported with loss of appetite