Insulin Resistance Syndrome
"I took Metformin Hcl ER 500 mg 2xday, for 2  years. I never felt quite well w it, especially  the constant fatigue. So I stopped. 

Now , 11/16, I was prescribed it again, &amp; almost immediately became lethargic,  weak, plus experienced extreme muscle pain &amp; stiffness in quadriceps (frontal thigh muscles) which caused my legs to become so weak &amp; stiff, walking was difficult."