Birth Control
"I was on this pill for 3 years and absolutely loved it. I had no negative side affects during this time.  My pharmacy stopped providing this pill around July 2015 and I was switched to something else until September 2015 when I was told Lo Loestrin was available again.  I immediately gained 10 pounds (I ran daily and ate healthy) and started to develop hives off and on for the next 4 months.  I ended up gaining 35 pounds over an 8 month duration due to the change in the chemical makeup of the pill that occurred in the fall of 2015.  Be wary if you have any sort of hypersensitivity to hormones as I do."