CGA and urogram

[Groda]

Hi All good advisers.

Have been on pred for CGA since July 2023, starting at 60mg. now at 12 mg with very slow taper.

I am having a kidney urogram this April. I am also on metformin 3 x daily 500 mg. I have read that I should stop taking metformin before this procedure. How many days before should I stop?

Thanks for your helpful input.

Groda

[DorsetLady PMRGCAuk volunteer]

Where have you read it ? In the metformin paperwork, or the procedure paperwork from the hospital? If latter then check with the hospital team.

[Groda in reply to DorsetLady]

I will check with the hospital about that. Thanks.

[PMRpro Ambassador in reply to DorsetLady]

Metformin, not MTX ...

[DorsetLady PMRGCAuk volunteer in reply to PMRpro]

Oops sorry … have amended

[PMRpro Ambassador]

Noone here capable of answering that I fear - your diabetes or renal teams or the radiology unit would be the place to start. However - here is an article with guidelines, but even they are undecided

ncbi.nlm.nih.gov/pmc/articl...

"For most patients, metformin should be stopped at the time of contrast administration

There is some controversy about when to stop and restart metformin for patients scheduled to undergo intravenous contrast-enhanced examinations.4 The guidelines from the Canadian Association of Radiologists2 state that patients taking metformin who have an estimated glomerular filtration rate (eGFR) of less than 60 mL/min should stop taking metformin at the time of contrast administration. The European Society of Urogenital Radiology advocates stopping metformin 48 hours before CT for patients with an eGFR of less than 45 mL/min.5"

So no straight answer!