Metformin
"I had been prescribed metformin for weight loss and being pre-diabetic. My GP wanted to treat it aggressively. Also slightly hypoglycemic. I had taken it religiously for about 2 mos. then went off it due to it gave me a metallic taste in my mouth and I just couldn't stand it anymore.

For the last month almost everyday, I've felt shaky, weak, fatigued and just weird whenever I was hungry and after almost every meal. (My blood sugar sometimes goes down way too low after eating). I decided this morning that maybe I should be back on the metformin so I took 1 at breakfast. Well I don't know if 1 pill can do it, but within an hour I've felt better than I have in months. The shaky weak feeling completely went away and I had a ton of energy since."