diarrhea
"I am a 54-year-old man and have suffered from chronic stomach problems for more than 7 years--the worst in the last 3.  I went 6 months gluten free with little help.  Six month ago I started taking Nature's Bounty Priobiotic 10 (bought at Costco).  I would say that it improved my condition by 25%.  Two weeks ago someone recommended Florastor.  I tried it and my churning, gassy stomach went away in the first day.  BUT...I started feeling by the end of the first day a bloating of my upper GI that got increasingly uncomfortable with each passing day.  I reduced the dosage from two caps a day to just 1 cap a day.  No change.  Bloated upper GI still.  I'm on my fourth day back on Nature's Bounty Probiotic 10.  No more chest pressure."