Hi there,
I don’t take metformin. But here is some NHS advice on the medication & a brief section on recommended timing of it?
NHS medicines information on dosage for metformin, how to take it and what to do if you miss a dose or take too much.
www.nhs.uk
What insulin are your prescribed?
Regarding the metformin interacting with your insulin dose. Speaking with your pharmacist & or doctor for some rough guidance.
It will be a little trial and error fitting the meds with your lifestyle.
Keep testing bloods & logging results to spot a general trend.
Best wishes.
Jay.