bacterial infection
"I took the probiotic (2 hrs before/after) this antibiotic and still slept in my clothes the first night because I was convinced I may be having a heart attack and may have to go to the ER.  Now, I'm taking Pepsid, as well, but today had to stop on my way to work because the hearburn is so severe. On day 3, I forgot the probiotic and had severe diarrhea - so don't do that.  The dental surgery was mild by comparison - I stopped the prescription painkillers after the first day - but the antibiotic is killing me."