Metformin
"I was on this medication for about 14yrs.
I am multiply disabled, with PCOS & Diabetes type 2, being the reasons why I was on this drug. 
Its an excellent drug, one that I was comfortable taking for many years, but recently was having issues with it. 
It started making my GERD get really bad. 
Also the smell of the pills themselves made me want to puke daily."