Hyperphosphataemia after Tramadol in dogs

127 reports to the FDA describe hyperphosphataemia in dogs given Tramadol. That is 3.4% of all reports for this medicine, compared with 0.6% across reports for all dog medicines, so it is reported unusually often with this medicine.

127Reports
91%Marked serious
10%Recovered
53%Died or euthanised
12 daysTypical onset
SponsoredWorried about your pet? Ask a veterinarian online, 24/7

How soon it started

Same day
3 3.3%
1–2 days
12 13%
3–7 days
23 26%
1–4 weeks
18 20%
Over a month
34 38%

How the animals did

Recovered
10 7.9%
Recovered with lasting effects
3 2.4%
Still unwell when reported
33 26%
Died
19 15%
Euthanised
48 38%
Not known
14 11%

Problems reported at the same time

Age of the animals

Under 1 year
2
1–3 years
18
4–7 years
32
8–11 years
48
12+ years
26

About this medicine

Type: medicine.

Questions owners ask

Can Tramadol cause hyperphosphataemia in dogs?
127 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 12 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).

Hyperphosphataemia with similar medicines

All reported side effects of Tramadol in dogs · Medicines most reported with hyperphosphataemia