If your cat is about to undergo a surgical procedure, it is likely that the vet will use Metacam Sub-Q injection at the time of the operation for pain relief.
This is fairly routine and will help to make your cat more comfortable after the operation.
However, make sure that your cat is administered one dose only.

Metacam Sub-Q injection for Cats is a one dose only medication and the Boehringer Ingelheim (the manufacturer’s) are very careful to spell that out.
According to the manufacturer’s own guidelines:
“Repeated use in cats has been associated with acute renal failure and death”
‘Do not administer a second dose’
“No safe repeat dose has been established in cats”
“Repeated use in cats has been associated with acute renal failure and death
‘The safety studies demonstrate a narrow margin of safety’

When you collect your cat after the surgery, ask the vet if he or she has been injected with Metacam. If so, talk to your vet about what the adverse reactions might be and keep an eye on your cat for several days (this is also clearly stated in the manufacturer’s instructions)
Also, check with your Vet that puss has had only one dose.

Our cat went into renal failure after 3 injections of Metacam. Our Vet admitted their well-meaning oversight and agreed Metacam was the cause. Our cat was 3 years old and survived.
Being informed beforehand is more important than acting afterwards.

Please click on this link to read Boehringer Ingelheim’s own instructions for Metacam.
Please read carefully under the sections ‘Warning’ “Dosage and Administration “ and ‘Foreign Experience’.

http://www.bi-vetmedica.com/product_...cam_Cat_RP.pdf