Hello Ann, I use Salbutamol (Blue) and Beclometazone (Brown) inhalers.
I am aware of the possibilty of interaction with Metformin (which I also take 500mg daily) but in practice have not found it makes much difference.
Mine is only a low dose of Metformin so maybe that makes a difference.
I suppose the way to find out would be to not use the inhaler for a week or so and check your BGs, then carry on using at normal and repeat the BG checks, but speak to your doc. first. I am assuming you have a meter and strips?
The trouble is, not using the inhaler is sometimes just not possible, if you get an attack there is no option.
I am also on Bendrofloumethiazide and that can also interact with Metformin, but since my Bgs stay pretty much under control I is all a bit academic.
Sorry, not much help am I?
H