Hi Sandmdc!
A bit of background for my rant. Check out the following
Metformin - Wikipedia, the free encyclopedia. You might try printing it out after you read it and highlight the portions referring to the fact that this drug is aimed at, and most useful for, Type-2 diabetics who are both overweight and Insulin Resistant.
From your self-description you are not overweight and it is yet to be proven that you are Insulin Resistant.
Ask your MD if S/He (I have the feeling that it's a "he" but I'm not sure) knows about Type-1.5 diabetes or adult onset Type-1? Does s/he know if you are simply slowing down in the pancreas department, or is s/he simply writing a prescription based on insufficient knowledge just to do a trial?
Please get more information on your condition.
__________________
Be well, do good work, and keep in touch
[Garison Keilor]
Ronin (a.k.a, George N. Wells, CPIM)
Tandemist/Lay Theologian
Enjoying Life and Learning about myself everyday.
Pre-D -- Not on Insulin

(yet)
For Cholesterol though:
2500 mg Niacin
10 mg Zocor
2008 cycling miles: 5372 (29 Dec)
2009 Cycling Miles: 4843 (20 Nov)
Fasting C-Peptide 1.4 (02 Oct 08)
HbA1c's:
01 July 2008 -- 5.0%
02 Oct 2008 -- 5.4%
01 Apr 2009 -- 5.6%
01 Oct 2009 -- 5.6%
01-Nov 2009 -- 5.4%